Uploaded 1.2.17 to xenial-proposed

apt (1.2.17) xenial; urgency=medium

  [ David Kalnischkies ]
  * apt-key: warn instead of fail on unreadable keyrings (LP: #1642386)
  * show apt-key warnings in apt update (Closes: 834973)

  [ Julian Andres Klode ]
  * test-releasefile-verification: installaptold: Clean up before run

 -- Julian Andres Klode <juli...@ubuntu.com>  Wed, 23 Nov 2016 20:09:27
+0100


** Changed in: apt (Ubuntu Xenial)
       Status: Triaged => In Progress

** Description changed:

+ [Impact]
+ Breaks update on systems with unreadable GPG keys
+ 
+ [Test case]
+ Run apt update with an unreadable GPG key file in trusted.gpg.d. This should 
work and (stretch goal) print a warning about the key being unreadable.
+ 
+ [Regression potential]
+ Low risk. We check that very situation in the automated test suite now like 
we did a lot of other situations before. The fix has been available in apt 
since 1.3_rc3 on Aug 30, and there have been no regressions reported since then.
+ 
+ [Original bug report]
  Hello, a recent apt update appears to have broken apt entirely.
  
  A coworker reported seeing troubles: http://paste.ubuntu.com/23487135/
  
  To test, I upgraded my laptop then immediately re-ran apt-get update &&
  apt-get -u dist-upgrade:
  
  sarnold@hunt:~/Downloads$ sudo apt-get update && sudo apt-get -u dist-upgrade
  Hit:1 http://mirrors.kernel.org/ubuntu xenial InRelease
- Hit:2 http://mirrors.kernel.org/ubuntu xenial-updates InRelease               
                                    
- Hit:3 http://mirrors.kernel.org/ubuntu xenial-security InRelease              
                                    
- Ign:4 http://mirrors.kernel.org/ubuntu precise InRelease                      
                                    
- Get:5 http://mirrors.kernel.org/ubuntu precise-updates InRelease [55.7 kB]    
                                    
- Get:6 http://mirrors.kernel.org/ubuntu precise-security InRelease [55.7 kB]   
                                    
- Get:7 http://mirrors.kernel.org/ubuntu precise-proposed InRelease [55.7 kB]   
                                    
- Ign:8 http://mirrors.kernel.org/ubuntu trusty InRelease                       
                                    
- Get:9 http://mirrors.kernel.org/ubuntu trusty-updates InRelease [65.9 kB]     
                                    
- Hit:10 http://mirrors.kernel.org/ubuntu trusty-security InRelease             
                                    
- Get:11 http://mirrors.kernel.org/ubuntu trusty-proposed InRelease [65.9 kB]   
                                    
- Get:12 http://mirrors.kernel.org/ubuntu xenial-proposed InRelease [247 kB]    
                                    
- Err:1 http://mirrors.kernel.org/ubuntu xenial InRelease                       
                                    
-   At least one invalid signature was encountered.
- Hit:13 http://security.debian.org jessie/updates InRelease                    
                                    
- Err:2 http://mirrors.kernel.org/ubuntu xenial-updates InRelease               
                                    
-   At least one invalid signature was encountered.
- Get:14 http://mirrors.kernel.org/ubuntu yakkety InRelease [247 kB]            
                                    
- Err:3 http://mirrors.kernel.org/ubuntu xenial-security InRelease              
                                    
-   At least one invalid signature was encountered.
- Hit:15 http://mirrors.kernel.org/ubuntu yakkety-updates InRelease             
                                    
- Get:16 http://mirrors.kernel.org/ubuntu yakkety-security InRelease [93.3 kB]  
                                    
- Hit:17 http://security.debian.org wheezy/updates InRelease                    
                                    
- Get:18 http://mirrors.kernel.org/ubuntu yakkety-proposed InRelease [95.7 kB]  
                                    
- Hit:19 http://mirrors.kernel.org/ubuntu zesty InRelease                       
                                    
- Hit:20 http://mirrors.kernel.org/ubuntu zesty-updates InRelease               
                                    
- Hit:21 http://mirrors.kernel.org/ubuntu zesty-security InRelease              
                                    
- Err:5 http://mirrors.kernel.org/ubuntu precise-updates InRelease              
                                    
-   At least one invalid signature was encountered.
- Hit:22 http://mirrors.kernel.org/ubuntu zesty-proposed InRelease              
                                    
- Hit:23 http://mirrors.kernel.org/ubuntu precise Release                       
                                    
- Hit:24 http://mirrors.kernel.org/ubuntu trusty Release                        
                                    
- Ign:25 http://archive.canonical.com/ubuntu precise InRelease                  
                                    
- Hit:26 http://security.ubuntu.com/ubuntu xenial-security InRelease            
                                    
+ Hit:2 http://mirrors.kernel.org/ubuntu xenial-updates InRelease
+ Hit:3 http://mirrors.kernel.org/ubuntu xenial-security InRelease
+ Ign:4 http://mirrors.kernel.org/ubuntu precise InRelease
+ Get:5 http://mirrors.kernel.org/ubuntu precise-updates InRelease [55.7 kB]
+ Get:6 http://mirrors.kernel.org/ubuntu precise-security InRelease [55.7 kB]
+ Get:7 http://mirrors.kernel.org/ubuntu precise-proposed InRelease [55.7 kB]
+ Ign:8 http://mirrors.kernel.org/ubuntu trusty InRelease
+ Get:9 http://mirrors.kernel.org/ubuntu trusty-updates InRelease [65.9 kB]
+ Hit:10 http://mirrors.kernel.org/ubuntu trusty-security InRelease
+ Get:11 http://mirrors.kernel.org/ubuntu trusty-proposed InRelease [65.9 kB]
+ Get:12 http://mirrors.kernel.org/ubuntu xenial-proposed InRelease [247 kB]
+ Err:1 http://mirrors.kernel.org/ubuntu xenial InRelease
+   At least one invalid signature was encountered.
+ Hit:13 http://security.debian.org jessie/updates InRelease
+ Err:2 http://mirrors.kernel.org/ubuntu xenial-updates InRelease
+   At least one invalid signature was encountered.
+ Get:14 http://mirrors.kernel.org/ubuntu yakkety InRelease [247 kB]
+ Err:3 http://mirrors.kernel.org/ubuntu xenial-security InRelease
+   At least one invalid signature was encountered.
+ Hit:15 http://mirrors.kernel.org/ubuntu yakkety-updates InRelease
+ Get:16 http://mirrors.kernel.org/ubuntu yakkety-security InRelease [93.3 kB]
+ Hit:17 http://security.debian.org wheezy/updates InRelease
+ Get:18 http://mirrors.kernel.org/ubuntu yakkety-proposed InRelease [95.7 kB]
+ Hit:19 http://mirrors.kernel.org/ubuntu zesty InRelease
+ Hit:20 http://mirrors.kernel.org/ubuntu zesty-updates InRelease
+ Hit:21 http://mirrors.kernel.org/ubuntu zesty-security InRelease
+ Err:5 http://mirrors.kernel.org/ubuntu precise-updates InRelease
+   At least one invalid signature was encountered.
+ Hit:22 http://mirrors.kernel.org/ubuntu zesty-proposed InRelease
+ Hit:23 http://mirrors.kernel.org/ubuntu precise Release
+ Hit:24 http://mirrors.kernel.org/ubuntu trusty Release
+ Ign:25 http://archive.canonical.com/ubuntu precise InRelease
+ Hit:26 http://security.ubuntu.com/ubuntu xenial-security InRelease
  Hit:27 
http://ppa.launchpad.net/ci-train-ppa-service/stable-phone-overlay/ubuntu vivid 
InRelease
- Hit:28 http://ftp.debian.org/debian unstable InRelease                        
                 
- Err:6 http://mirrors.kernel.org/ubuntu precise-security InRelease        
-   At least one invalid signature was encountered.
- Err:7 http://mirrors.kernel.org/ubuntu precise-proposed InRelease             
                 
-   At least one invalid signature was encountered.
- Err:9 http://mirrors.kernel.org/ubuntu trusty-updates InRelease               
                 
-   At least one invalid signature was encountered.
- Ign:29 http://archive.canonical.com/ubuntu trusty InRelease                   
                  
- Hit:30 http://ppa.launchpad.net/snappy-dev/image/ubuntu vivid InRelease       
                  
- Hit:31 http://ftp.debian.org/debian testing InRelease                     
- Err:10 http://mirrors.kernel.org/ubuntu trusty-security InRelease         
-   At least one invalid signature was encountered.
- Err:11 http://mirrors.kernel.org/ubuntu trusty-proposed InRelease             
                  
-   At least one invalid signature was encountered.
- Err:13 http://security.debian.org jessie/updates InRelease                    
                  
-   At least one invalid signature was encountered.
- Hit:32 http://archive.canonical.com/ubuntu xenial InRelease                   
                  
+ Hit:28 http://ftp.debian.org/debian unstable InRelease
+ Err:6 http://mirrors.kernel.org/ubuntu precise-security InRelease
+   At least one invalid signature was encountered.
+ Err:7 http://mirrors.kernel.org/ubuntu precise-proposed InRelease
+   At least one invalid signature was encountered.
+ Err:9 http://mirrors.kernel.org/ubuntu trusty-updates InRelease
+   At least one invalid signature was encountered.
+ Ign:29 http://archive.canonical.com/ubuntu trusty InRelease
+ Hit:30 http://ppa.launchpad.net/snappy-dev/image/ubuntu vivid InRelease
+ Hit:31 http://ftp.debian.org/debian testing InRelease
+ Err:10 http://mirrors.kernel.org/ubuntu trusty-security InRelease
+   At least one invalid signature was encountered.
+ Err:11 http://mirrors.kernel.org/ubuntu trusty-proposed InRelease
+   At least one invalid signature was encountered.
+ Err:13 http://security.debian.org jessie/updates InRelease
+   At least one invalid signature was encountered.
+ Hit:32 http://archive.canonical.com/ubuntu xenial InRelease
  Hit:33 
http://ppa.launchpad.net/ci-train-ppa-service/stable-phone-overlay/ubuntu 
xenial InRelease
- Ign:34 http://ftp.debian.org/debian jessie InRelease                     
- Err:12 http://mirrors.kernel.org/ubuntu xenial-proposed InRelease        
-   At least one invalid signature was encountered.
- Err:14 http://mirrors.kernel.org/ubuntu yakkety InRelease                
-   At least one invalid signature was encountered.
- Hit:35 http://archive.canonical.com/ubuntu yakkety InRelease              
- Err:15 http://mirrors.kernel.org/ubuntu yakkety-updates InRelease         
-   At least one invalid signature was encountered.
- Hit:36 http://ftp.debian.org/debian jessie-updates InRelease              
- Err:16 http://mirrors.kernel.org/ubuntu yakkety-security InRelease        
-   At least one invalid signature was encountered.
- Err:17 http://security.debian.org wheezy/updates InRelease                
-   At least one invalid signature was encountered.
- Hit:37 http://archive.canonical.com/ubuntu zesty InRelease                
- Err:18 http://mirrors.kernel.org/ubuntu yakkety-proposed InRelease        
-   At least one invalid signature was encountered.
- Ign:38 http://ftp.debian.org/debian wheezy InRelease                     
- Err:19 http://mirrors.kernel.org/ubuntu zesty InRelease                  
-   At least one invalid signature was encountered.
- Err:20 http://mirrors.kernel.org/ubuntu zesty-updates InRelease           
-   At least one invalid signature was encountered.
- Hit:39 http://archive.canonical.com/ubuntu precise Release                
- Err:21 http://mirrors.kernel.org/ubuntu zesty-security InRelease          
-   At least one invalid signature was encountered.
- Hit:40 http://ftp.debian.org/debian wheezy-updates InRelease              
- Err:22 http://mirrors.kernel.org/ubuntu zesty-proposed InRelease          
-   At least one invalid signature was encountered.
- Err:41 http://mirrors.kernel.org/ubuntu precise Release.gpg               
-   At least one invalid signature was encountered.
- Hit:42 http://archive.canonical.com/ubuntu trusty Release                
- Err:43 http://mirrors.kernel.org/ubuntu trusty Release.gpg               
-   At least one invalid signature was encountered.
- Hit:44 http://ftp.debian.org/debian jessie Release  
+ Ign:34 http://ftp.debian.org/debian jessie InRelease
+ Err:12 http://mirrors.kernel.org/ubuntu xenial-proposed InRelease
+   At least one invalid signature was encountered.
+ Err:14 http://mirrors.kernel.org/ubuntu yakkety InRelease
+   At least one invalid signature was encountered.
+ Hit:35 http://archive.canonical.com/ubuntu yakkety InRelease
+ Err:15 http://mirrors.kernel.org/ubuntu yakkety-updates InRelease
+   At least one invalid signature was encountered.
+ Hit:36 http://ftp.debian.org/debian jessie-updates InRelease
+ Err:16 http://mirrors.kernel.org/ubuntu yakkety-security InRelease
+   At least one invalid signature was encountered.
+ Err:17 http://security.debian.org wheezy/updates InRelease
+   At least one invalid signature was encountered.
+ Hit:37 http://archive.canonical.com/ubuntu zesty InRelease
+ Err:18 http://mirrors.kernel.org/ubuntu yakkety-proposed InRelease
+   At least one invalid signature was encountered.
+ Ign:38 http://ftp.debian.org/debian wheezy InRelease
+ Err:19 http://mirrors.kernel.org/ubuntu zesty InRelease
+   At least one invalid signature was encountered.
+ Err:20 http://mirrors.kernel.org/ubuntu zesty-updates InRelease
+   At least one invalid signature was encountered.
+ Hit:39 http://archive.canonical.com/ubuntu precise Release
+ Err:21 http://mirrors.kernel.org/ubuntu zesty-security InRelease
+   At least one invalid signature was encountered.
+ Hit:40 http://ftp.debian.org/debian wheezy-updates InRelease
+ Err:22 http://mirrors.kernel.org/ubuntu zesty-proposed InRelease
+   At least one invalid signature was encountered.
+ Err:41 http://mirrors.kernel.org/ubuntu precise Release.gpg
+   At least one invalid signature was encountered.
+ Hit:42 http://archive.canonical.com/ubuntu trusty Release
+ Err:43 http://mirrors.kernel.org/ubuntu trusty Release.gpg
+   At least one invalid signature was encountered.
+ Hit:44 http://ftp.debian.org/debian jessie Release
  Err:26 http://security.ubuntu.com/ubuntu xenial-security InRelease
-   At least one invalid signature was encountered.
+   At least one invalid signature was encountered.
  Err:27 
http://ppa.launchpad.net/ci-train-ppa-service/stable-phone-overlay/ubuntu vivid 
InRelease
-   At least one invalid signature was encountered.
+   At least one invalid signature was encountered.
  Err:28 http://ftp.debian.org/debian unstable InRelease
-   At least one invalid signature was encountered.
- Hit:45 http://ftp.debian.org/debian wheezy Release  
+   At least one invalid signature was encountered.
+ Hit:45 http://ftp.debian.org/debian wheezy Release
  Err:30 http://ppa.launchpad.net/snappy-dev/image/ubuntu vivid InRelease
-   At least one invalid signature was encountered.
+   At least one invalid signature was encountered.
  Err:31 http://ftp.debian.org/debian testing InRelease
-   At least one invalid signature was encountered.
+   At least one invalid signature was encountered.
  Err:32 http://archive.canonical.com/ubuntu xenial InRelease
-   At least one invalid signature was encountered.
+   At least one invalid signature was encountered.
  Err:33 
http://ppa.launchpad.net/ci-train-ppa-service/stable-phone-overlay/ubuntu 
xenial InRelease
-   At least one invalid signature was encountered.
+   At least one invalid signature was encountered.
  Err:35 http://archive.canonical.com/ubuntu yakkety InRelease
-   At least one invalid signature was encountered.
+   At least one invalid signature was encountered.
  Err:36 http://ftp.debian.org/debian jessie-updates InRelease
-   At least one invalid signature was encountered.
+   At least one invalid signature was encountered.
  Err:37 http://archive.canonical.com/ubuntu zesty InRelease
-   At least one invalid signature was encountered.
+   At least one invalid signature was encountered.
  Err:46 http://archive.canonical.com/ubuntu precise Release.gpg
-   At least one invalid signature was encountered.
+   At least one invalid signature was encountered.
  Err:40 http://ftp.debian.org/debian wheezy-updates InRelease
-   At least one invalid signature was encountered.
+   At least one invalid signature was encountered.
  Err:47 http://archive.canonical.com/ubuntu trusty Release.gpg
-   At least one invalid signature was encountered.
+   At least one invalid signature was encountered.
  Err:48 http://ftp.debian.org/debian jessie Release.gpg
-   At least one invalid signature was encountered.
+   At least one invalid signature was encountered.
  Err:49 http://ftp.debian.org/debian wheezy Release.gpg
-   At least one invalid signature was encountered.
+   At least one invalid signature was encountered.
  Fetched 981 kB in 1s (496 kB/s)
  Reading package lists... Done
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://mirrors.kernel.org/ubuntu xenial InRelease: At least one invalid 
signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://mirrors.kernel.org/ubuntu xenial-updates InRelease: At least one invalid 
signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://mirrors.kernel.org/ubuntu xenial-security InRelease: At least one 
invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://mirrors.kernel.org/ubuntu precise-updates InRelease: At least one 
invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://mirrors.kernel.org/ubuntu precise-security InRelease: At least one 
invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://mirrors.kernel.org/ubuntu precise-proposed InRelease: At least one 
invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://mirrors.kernel.org/ubuntu trusty-updates InRelease: At least one invalid 
signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://mirrors.kernel.org/ubuntu trusty-security InRelease: At least one 
invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://mirrors.kernel.org/ubuntu trusty-proposed InRelease: At least one 
invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://security.debian.org jessie/updates InRelease: At least one invalid 
signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://mirrors.kernel.org/ubuntu xenial-proposed InRelease: At least one 
invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://mirrors.kernel.org/ubuntu yakkety InRelease: At least one invalid 
signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://mirrors.kernel.org/ubuntu yakkety-updates InRelease: At least one 
invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://mirrors.kernel.org/ubuntu yakkety-security InRelease: At least one 
invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://security.debian.org wheezy/updates InRelease: At least one invalid 
signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://mirrors.kernel.org/ubuntu yakkety-proposed InRelease: At least one 
invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://mirrors.kernel.org/ubuntu zesty InRelease: At least one invalid 
signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://mirrors.kernel.org/ubuntu zesty-updates InRelease: At least one invalid 
signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://mirrors.kernel.org/ubuntu zesty-security InRelease: At least one invalid 
signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://mirrors.kernel.org/ubuntu zesty-proposed InRelease: At least one invalid 
signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://mirrors.kernel.org/ubuntu precise Release: At least one invalid 
signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://mirrors.kernel.org/ubuntu trusty Release: At least one invalid signature 
was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://security.ubuntu.com/ubuntu xenial-security InRelease: At least one 
invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://ppa.launchpad.net/ci-train-ppa-service/stable-phone-overlay/ubuntu vivid 
InRelease: At least one invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://ftp.debian.org/debian unstable InRelease: At least one invalid signature 
was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://ppa.launchpad.net/snappy-dev/image/ubuntu vivid InRelease: At least one 
invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://ftp.debian.org/debian testing InRelease: At least one invalid signature 
was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://archive.canonical.com/ubuntu xenial InRelease: At least one invalid 
signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://ppa.launchpad.net/ci-train-ppa-service/stable-phone-overlay/ubuntu 
xenial InRelease: At least one invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://archive.canonical.com/ubuntu yakkety InRelease: At least one invalid 
signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://ftp.debian.org/debian jessie-updates InRelease: At least one invalid 
signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://archive.canonical.com/ubuntu zesty InRelease: At least one invalid 
signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://archive.canonical.com/ubuntu precise Release: At least one invalid 
signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://ftp.debian.org/debian wheezy-updates InRelease: At least one invalid 
signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://archive.canonical.com/ubuntu trusty Release: At least one invalid 
signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://ftp.debian.org/debian jessie Release: At least one invalid signature was 
encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://ftp.debian.org/debian wheezy Release: At least one invalid signature was 
encountered.
  W: Failed to fetch http://mirrors.kernel.org/ubuntu/dists/xenial/InRelease  
At least one invalid signature was encountered.
  W: Failed to fetch 
http://mirrors.kernel.org/ubuntu/dists/xenial-updates/InRelease  At least one 
invalid signature was encountered.
  W: Failed to fetch 
http://mirrors.kernel.org/ubuntu/dists/xenial-security/InRelease  At least one 
invalid signature was encountered.
  W: Failed to fetch 
http://security.ubuntu.com/ubuntu/dists/xenial-security/InRelease  At least one 
invalid signature was encountered.
  W: Failed to fetch 
http://ppa.launchpad.net/ci-train-ppa-service/stable-phone-overlay/ubuntu/dists/vivid/InRelease
  At least one invalid signature was encountered.
  W: Failed to fetch 
http://ppa.launchpad.net/snappy-dev/image/ubuntu/dists/vivid/InRelease  At 
least one invalid signature was encountered.
  W: Failed to fetch 
http://ppa.launchpad.net/ci-train-ppa-service/stable-phone-overlay/ubuntu/dists/xenial/InRelease
  At least one invalid signature was encountered.
  W: Failed to fetch 
http://mirrors.kernel.org/ubuntu/dists/precise-updates/InRelease  At least one 
invalid signature was encountered.
  W: Failed to fetch 
http://mirrors.kernel.org/ubuntu/dists/precise-security/InRelease  At least one 
invalid signature was encountered.
  W: Failed to fetch 
http://mirrors.kernel.org/ubuntu/dists/precise-proposed/InRelease  At least one 
invalid signature was encountered.
  W: Failed to fetch 
http://mirrors.kernel.org/ubuntu/dists/trusty-updates/InRelease  At least one 
invalid signature was encountered.
  W: Failed to fetch 
http://mirrors.kernel.org/ubuntu/dists/trusty-security/InRelease  At least one 
invalid signature was encountered.
  W: Failed to fetch 
http://mirrors.kernel.org/ubuntu/dists/trusty-proposed/InRelease  At least one 
invalid signature was encountered.
  W: Failed to fetch 
http://mirrors.kernel.org/ubuntu/dists/xenial-proposed/InRelease  At least one 
invalid signature was encountered.
  W: Failed to fetch http://archive.canonical.com/ubuntu/dists/xenial/InRelease 
 At least one invalid signature was encountered.
  W: Failed to fetch http://mirrors.kernel.org/ubuntu/dists/yakkety/InRelease  
At least one invalid signature was encountered.
  W: Failed to fetch 
http://mirrors.kernel.org/ubuntu/dists/yakkety-updates/InRelease  At least one 
invalid signature was encountered.
  W: Failed to fetch 
http://mirrors.kernel.org/ubuntu/dists/yakkety-security/InRelease  At least one 
invalid signature was encountered.
  W: Failed to fetch 
http://mirrors.kernel.org/ubuntu/dists/yakkety-proposed/InRelease  At least one 
invalid signature was encountered.
  W: Failed to fetch 
http://archive.canonical.com/ubuntu/dists/yakkety/InRelease  At least one 
invalid signature was encountered.
  W: Failed to fetch http://mirrors.kernel.org/ubuntu/dists/zesty/InRelease  At 
least one invalid signature was encountered.
  W: Failed to fetch 
http://mirrors.kernel.org/ubuntu/dists/zesty-updates/InRelease  At least one 
invalid signature was encountered.
  W: Failed to fetch 
http://mirrors.kernel.org/ubuntu/dists/zesty-security/InRelease  At least one 
invalid signature was encountered.
  W: Failed to fetch 
http://mirrors.kernel.org/ubuntu/dists/zesty-proposed/InRelease  At least one 
invalid signature was encountered.
  W: Failed to fetch http://archive.canonical.com/ubuntu/dists/zesty/InRelease  
At least one invalid signature was encountered.
  W: Failed to fetch http://ftp.debian.org/debian/dists/unstable/InRelease  At 
least one invalid signature was encountered.
  W: Failed to fetch http://ftp.debian.org/debian/dists/testing/InRelease  At 
least one invalid signature was encountered.
  W: Failed to fetch 
http://ftp.debian.org/debian/dists/jessie-updates/InRelease  At least one 
invalid signature was encountered.
  W: Failed to fetch http://security.debian.org/dists/jessie/updates/InRelease  
At least one invalid signature was encountered.
  W: Failed to fetch 
http://ftp.debian.org/debian/dists/wheezy-updates/InRelease  At least one 
invalid signature was encountered.
  W: Failed to fetch http://security.debian.org/dists/wheezy/updates/InRelease  
At least one invalid signature was encountered.
  W: Failed to fetch http://mirrors.kernel.org/ubuntu/dists/precise/Release.gpg 
 At least one invalid signature was encountered.
  W: Failed to fetch http://mirrors.kernel.org/ubuntu/dists/trusty/Release.gpg  
At least one invalid signature was encountered.
  W: Failed to fetch 
http://archive.canonical.com/ubuntu/dists/precise/Release.gpg  At least one 
invalid signature was encountered.
  W: Failed to fetch 
http://archive.canonical.com/ubuntu/dists/trusty/Release.gpg  At least one 
invalid signature was encountered.
  W: Failed to fetch http://ftp.debian.org/debian/dists/jessie/Release.gpg  At 
least one invalid signature was encountered.
  W: Failed to fetch http://ftp.debian.org/debian/dists/wheezy/Release.gpg  At 
least one invalid signature was encountered.
  W: Some index files failed to download. They have been ignored, or old ones 
used instead.
  Reading package lists... Done
- Building dependency tree       
+ Building dependency tree
  Reading state information... Done
  Calculating upgrade... Done
  The following packages were automatically installed and are no longer 
required:
-   linux-headers-4.4.0-21 linux-headers-4.4.0-21-generic 
linux-headers-4.4.0-22 linux-headers-4.4.0-22-generic
-   linux-headers-4.4.0-24 linux-headers-4.4.0-24-generic 
linux-headers-4.4.0-28 linux-headers-4.4.0-28-generic
-   linux-headers-4.4.0-31 linux-headers-4.4.0-31-generic 
linux-headers-4.4.0-34 linux-headers-4.4.0-34-generic
-   linux-headers-4.4.0-36 linux-headers-4.4.0-36-generic 
linux-headers-4.4.0-38 linux-headers-4.4.0-38-generic
-   linux-image-4.4.0-21-generic linux-image-4.4.0-22-generic 
linux-image-4.4.0-24-generic
-   linux-image-4.4.0-28-generic linux-image-4.4.0-31-generic 
linux-image-4.4.0-34-generic
-   linux-image-4.4.0-36-generic linux-image-4.4.0-38-generic
+   linux-headers-4.4.0-21 linux-headers-4.4.0-21-generic 
linux-headers-4.4.0-22 linux-headers-4.4.0-22-generic
+   linux-headers-4.4.0-24 linux-headers-4.4.0-24-generic 
linux-headers-4.4.0-28 linux-headers-4.4.0-28-generic
+   linux-headers-4.4.0-31 linux-headers-4.4.0-31-generic 
linux-headers-4.4.0-34 linux-headers-4.4.0-34-generic
+   linux-headers-4.4.0-36 linux-headers-4.4.0-36-generic 
linux-headers-4.4.0-38 linux-headers-4.4.0-38-generic
+   linux-image-4.4.0-21-generic linux-image-4.4.0-22-generic 
linux-image-4.4.0-24-generic
+   linux-image-4.4.0-28-generic linux-image-4.4.0-31-generic 
linux-image-4.4.0-34-generic
+   linux-image-4.4.0-36-generic linux-image-4.4.0-38-generic
  Use 'sudo apt autoremove' to remove them.
  0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
- 
  
  I'll attach the full terminal log soon.
  
  Thanks
  
  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: apt 1.2.15
  ProcVersionSignature: Ubuntu 4.4.0-45.66-generic 4.4.21
  Uname: Linux 4.4.0-45-generic x86_64
  NonfreeKernelModules: zfs zunicode zcommon znvpair zavl
  ApportVersion: 2.20.1-0ubuntu2.1
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Wed Nov 16 12:29:54 2016
  InstallationDate: Installed on 2012-10-18 (1490 days ago)
  InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 
(20120823.1)
  SourcePackage: apt
  UpgradeStatus: Upgraded to xenial on 2016-04-30 (200 days ago)

-- 
You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to apt in Ubuntu.
https://bugs.launchpad.net/bugs/1642386

Title:
  At least one invalid signature was encountered.

Status in apt package in Ubuntu:
  Fix Released
Status in apt source package in Xenial:
  In Progress

Bug description:
  [Impact]
  Breaks update on systems with unreadable GPG keys

  [Test case]
  Run apt update with an unreadable GPG key file in trusted.gpg.d. This should 
work and (stretch goal) print a warning about the key being unreadable.

  [Regression potential]
  Low risk. We check that very situation in the automated test suite now like 
we did a lot of other situations before. The fix has been available in apt 
since 1.3_rc3 on Aug 30, and there have been no regressions reported since then.

  [Original bug report]
  Hello, a recent apt update appears to have broken apt entirely.

  A coworker reported seeing troubles: http://paste.ubuntu.com/23487135/

  To test, I upgraded my laptop then immediately re-ran apt-get update
  && apt-get -u dist-upgrade:

  sarnold@hunt:~/Downloads$ sudo apt-get update && sudo apt-get -u dist-upgrade
  Hit:1 http://mirrors.kernel.org/ubuntu xenial InRelease
  Hit:2 http://mirrors.kernel.org/ubuntu xenial-updates InRelease
  Hit:3 http://mirrors.kernel.org/ubuntu xenial-security InRelease
  Ign:4 http://mirrors.kernel.org/ubuntu precise InRelease
  Get:5 http://mirrors.kernel.org/ubuntu precise-updates InRelease [55.7 kB]
  Get:6 http://mirrors.kernel.org/ubuntu precise-security InRelease [55.7 kB]
  Get:7 http://mirrors.kernel.org/ubuntu precise-proposed InRelease [55.7 kB]
  Ign:8 http://mirrors.kernel.org/ubuntu trusty InRelease
  Get:9 http://mirrors.kernel.org/ubuntu trusty-updates InRelease [65.9 kB]
  Hit:10 http://mirrors.kernel.org/ubuntu trusty-security InRelease
  Get:11 http://mirrors.kernel.org/ubuntu trusty-proposed InRelease [65.9 kB]
  Get:12 http://mirrors.kernel.org/ubuntu xenial-proposed InRelease [247 kB]
  Err:1 http://mirrors.kernel.org/ubuntu xenial InRelease
    At least one invalid signature was encountered.
  Hit:13 http://security.debian.org jessie/updates InRelease
  Err:2 http://mirrors.kernel.org/ubuntu xenial-updates InRelease
    At least one invalid signature was encountered.
  Get:14 http://mirrors.kernel.org/ubuntu yakkety InRelease [247 kB]
  Err:3 http://mirrors.kernel.org/ubuntu xenial-security InRelease
    At least one invalid signature was encountered.
  Hit:15 http://mirrors.kernel.org/ubuntu yakkety-updates InRelease
  Get:16 http://mirrors.kernel.org/ubuntu yakkety-security InRelease [93.3 kB]
  Hit:17 http://security.debian.org wheezy/updates InRelease
  Get:18 http://mirrors.kernel.org/ubuntu yakkety-proposed InRelease [95.7 kB]
  Hit:19 http://mirrors.kernel.org/ubuntu zesty InRelease
  Hit:20 http://mirrors.kernel.org/ubuntu zesty-updates InRelease
  Hit:21 http://mirrors.kernel.org/ubuntu zesty-security InRelease
  Err:5 http://mirrors.kernel.org/ubuntu precise-updates InRelease
    At least one invalid signature was encountered.
  Hit:22 http://mirrors.kernel.org/ubuntu zesty-proposed InRelease
  Hit:23 http://mirrors.kernel.org/ubuntu precise Release
  Hit:24 http://mirrors.kernel.org/ubuntu trusty Release
  Ign:25 http://archive.canonical.com/ubuntu precise InRelease
  Hit:26 http://security.ubuntu.com/ubuntu xenial-security InRelease
  Hit:27 
http://ppa.launchpad.net/ci-train-ppa-service/stable-phone-overlay/ubuntu vivid 
InRelease
  Hit:28 http://ftp.debian.org/debian unstable InRelease
  Err:6 http://mirrors.kernel.org/ubuntu precise-security InRelease
    At least one invalid signature was encountered.
  Err:7 http://mirrors.kernel.org/ubuntu precise-proposed InRelease
    At least one invalid signature was encountered.
  Err:9 http://mirrors.kernel.org/ubuntu trusty-updates InRelease
    At least one invalid signature was encountered.
  Ign:29 http://archive.canonical.com/ubuntu trusty InRelease
  Hit:30 http://ppa.launchpad.net/snappy-dev/image/ubuntu vivid InRelease
  Hit:31 http://ftp.debian.org/debian testing InRelease
  Err:10 http://mirrors.kernel.org/ubuntu trusty-security InRelease
    At least one invalid signature was encountered.
  Err:11 http://mirrors.kernel.org/ubuntu trusty-proposed InRelease
    At least one invalid signature was encountered.
  Err:13 http://security.debian.org jessie/updates InRelease
    At least one invalid signature was encountered.
  Hit:32 http://archive.canonical.com/ubuntu xenial InRelease
  Hit:33 
http://ppa.launchpad.net/ci-train-ppa-service/stable-phone-overlay/ubuntu 
xenial InRelease
  Ign:34 http://ftp.debian.org/debian jessie InRelease
  Err:12 http://mirrors.kernel.org/ubuntu xenial-proposed InRelease
    At least one invalid signature was encountered.
  Err:14 http://mirrors.kernel.org/ubuntu yakkety InRelease
    At least one invalid signature was encountered.
  Hit:35 http://archive.canonical.com/ubuntu yakkety InRelease
  Err:15 http://mirrors.kernel.org/ubuntu yakkety-updates InRelease
    At least one invalid signature was encountered.
  Hit:36 http://ftp.debian.org/debian jessie-updates InRelease
  Err:16 http://mirrors.kernel.org/ubuntu yakkety-security InRelease
    At least one invalid signature was encountered.
  Err:17 http://security.debian.org wheezy/updates InRelease
    At least one invalid signature was encountered.
  Hit:37 http://archive.canonical.com/ubuntu zesty InRelease
  Err:18 http://mirrors.kernel.org/ubuntu yakkety-proposed InRelease
    At least one invalid signature was encountered.
  Ign:38 http://ftp.debian.org/debian wheezy InRelease
  Err:19 http://mirrors.kernel.org/ubuntu zesty InRelease
    At least one invalid signature was encountered.
  Err:20 http://mirrors.kernel.org/ubuntu zesty-updates InRelease
    At least one invalid signature was encountered.
  Hit:39 http://archive.canonical.com/ubuntu precise Release
  Err:21 http://mirrors.kernel.org/ubuntu zesty-security InRelease
    At least one invalid signature was encountered.
  Hit:40 http://ftp.debian.org/debian wheezy-updates InRelease
  Err:22 http://mirrors.kernel.org/ubuntu zesty-proposed InRelease
    At least one invalid signature was encountered.
  Err:41 http://mirrors.kernel.org/ubuntu precise Release.gpg
    At least one invalid signature was encountered.
  Hit:42 http://archive.canonical.com/ubuntu trusty Release
  Err:43 http://mirrors.kernel.org/ubuntu trusty Release.gpg
    At least one invalid signature was encountered.
  Hit:44 http://ftp.debian.org/debian jessie Release
  Err:26 http://security.ubuntu.com/ubuntu xenial-security InRelease
    At least one invalid signature was encountered.
  Err:27 
http://ppa.launchpad.net/ci-train-ppa-service/stable-phone-overlay/ubuntu vivid 
InRelease
    At least one invalid signature was encountered.
  Err:28 http://ftp.debian.org/debian unstable InRelease
    At least one invalid signature was encountered.
  Hit:45 http://ftp.debian.org/debian wheezy Release
  Err:30 http://ppa.launchpad.net/snappy-dev/image/ubuntu vivid InRelease
    At least one invalid signature was encountered.
  Err:31 http://ftp.debian.org/debian testing InRelease
    At least one invalid signature was encountered.
  Err:32 http://archive.canonical.com/ubuntu xenial InRelease
    At least one invalid signature was encountered.
  Err:33 
http://ppa.launchpad.net/ci-train-ppa-service/stable-phone-overlay/ubuntu 
xenial InRelease
    At least one invalid signature was encountered.
  Err:35 http://archive.canonical.com/ubuntu yakkety InRelease
    At least one invalid signature was encountered.
  Err:36 http://ftp.debian.org/debian jessie-updates InRelease
    At least one invalid signature was encountered.
  Err:37 http://archive.canonical.com/ubuntu zesty InRelease
    At least one invalid signature was encountered.
  Err:46 http://archive.canonical.com/ubuntu precise Release.gpg
    At least one invalid signature was encountered.
  Err:40 http://ftp.debian.org/debian wheezy-updates InRelease
    At least one invalid signature was encountered.
  Err:47 http://archive.canonical.com/ubuntu trusty Release.gpg
    At least one invalid signature was encountered.
  Err:48 http://ftp.debian.org/debian jessie Release.gpg
    At least one invalid signature was encountered.
  Err:49 http://ftp.debian.org/debian wheezy Release.gpg
    At least one invalid signature was encountered.
  Fetched 981 kB in 1s (496 kB/s)
  Reading package lists... Done
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://mirrors.kernel.org/ubuntu xenial InRelease: At least one invalid 
signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://mirrors.kernel.org/ubuntu xenial-updates InRelease: At least one invalid 
signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://mirrors.kernel.org/ubuntu xenial-security InRelease: At least one 
invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://mirrors.kernel.org/ubuntu precise-updates InRelease: At least one 
invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://mirrors.kernel.org/ubuntu precise-security InRelease: At least one 
invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://mirrors.kernel.org/ubuntu precise-proposed InRelease: At least one 
invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://mirrors.kernel.org/ubuntu trusty-updates InRelease: At least one invalid 
signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://mirrors.kernel.org/ubuntu trusty-security InRelease: At least one 
invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://mirrors.kernel.org/ubuntu trusty-proposed InRelease: At least one 
invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://security.debian.org jessie/updates InRelease: At least one invalid 
signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://mirrors.kernel.org/ubuntu xenial-proposed InRelease: At least one 
invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://mirrors.kernel.org/ubuntu yakkety InRelease: At least one invalid 
signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://mirrors.kernel.org/ubuntu yakkety-updates InRelease: At least one 
invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://mirrors.kernel.org/ubuntu yakkety-security InRelease: At least one 
invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://security.debian.org wheezy/updates InRelease: At least one invalid 
signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://mirrors.kernel.org/ubuntu yakkety-proposed InRelease: At least one 
invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://mirrors.kernel.org/ubuntu zesty InRelease: At least one invalid 
signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://mirrors.kernel.org/ubuntu zesty-updates InRelease: At least one invalid 
signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://mirrors.kernel.org/ubuntu zesty-security InRelease: At least one invalid 
signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://mirrors.kernel.org/ubuntu zesty-proposed InRelease: At least one invalid 
signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://mirrors.kernel.org/ubuntu precise Release: At least one invalid 
signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://mirrors.kernel.org/ubuntu trusty Release: At least one invalid signature 
was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://security.ubuntu.com/ubuntu xenial-security InRelease: At least one 
invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://ppa.launchpad.net/ci-train-ppa-service/stable-phone-overlay/ubuntu vivid 
InRelease: At least one invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://ftp.debian.org/debian unstable InRelease: At least one invalid signature 
was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://ppa.launchpad.net/snappy-dev/image/ubuntu vivid InRelease: At least one 
invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://ftp.debian.org/debian testing InRelease: At least one invalid signature 
was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://archive.canonical.com/ubuntu xenial InRelease: At least one invalid 
signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://ppa.launchpad.net/ci-train-ppa-service/stable-phone-overlay/ubuntu 
xenial InRelease: At least one invalid signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://archive.canonical.com/ubuntu yakkety InRelease: At least one invalid 
signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://ftp.debian.org/debian jessie-updates InRelease: At least one invalid 
signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://archive.canonical.com/ubuntu zesty InRelease: At least one invalid 
signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://archive.canonical.com/ubuntu precise Release: At least one invalid 
signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://ftp.debian.org/debian wheezy-updates InRelease: At least one invalid 
signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://archive.canonical.com/ubuntu trusty Release: At least one invalid 
signature was encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://ftp.debian.org/debian jessie Release: At least one invalid signature was 
encountered.
  W: An error occurred during the signature verification. The repository is not 
updated and the previous index files will be used. GPG error: 
http://ftp.debian.org/debian wheezy Release: At least one invalid signature was 
encountered.
  W: Failed to fetch http://mirrors.kernel.org/ubuntu/dists/xenial/InRelease  
At least one invalid signature was encountered.
  W: Failed to fetch 
http://mirrors.kernel.org/ubuntu/dists/xenial-updates/InRelease  At least one 
invalid signature was encountered.
  W: Failed to fetch 
http://mirrors.kernel.org/ubuntu/dists/xenial-security/InRelease  At least one 
invalid signature was encountered.
  W: Failed to fetch 
http://security.ubuntu.com/ubuntu/dists/xenial-security/InRelease  At least one 
invalid signature was encountered.
  W: Failed to fetch 
http://ppa.launchpad.net/ci-train-ppa-service/stable-phone-overlay/ubuntu/dists/vivid/InRelease
  At least one invalid signature was encountered.
  W: Failed to fetch 
http://ppa.launchpad.net/snappy-dev/image/ubuntu/dists/vivid/InRelease  At 
least one invalid signature was encountered.
  W: Failed to fetch 
http://ppa.launchpad.net/ci-train-ppa-service/stable-phone-overlay/ubuntu/dists/xenial/InRelease
  At least one invalid signature was encountered.
  W: Failed to fetch 
http://mirrors.kernel.org/ubuntu/dists/precise-updates/InRelease  At least one 
invalid signature was encountered.
  W: Failed to fetch 
http://mirrors.kernel.org/ubuntu/dists/precise-security/InRelease  At least one 
invalid signature was encountered.
  W: Failed to fetch 
http://mirrors.kernel.org/ubuntu/dists/precise-proposed/InRelease  At least one 
invalid signature was encountered.
  W: Failed to fetch 
http://mirrors.kernel.org/ubuntu/dists/trusty-updates/InRelease  At least one 
invalid signature was encountered.
  W: Failed to fetch 
http://mirrors.kernel.org/ubuntu/dists/trusty-security/InRelease  At least one 
invalid signature was encountered.
  W: Failed to fetch 
http://mirrors.kernel.org/ubuntu/dists/trusty-proposed/InRelease  At least one 
invalid signature was encountered.
  W: Failed to fetch 
http://mirrors.kernel.org/ubuntu/dists/xenial-proposed/InRelease  At least one 
invalid signature was encountered.
  W: Failed to fetch http://archive.canonical.com/ubuntu/dists/xenial/InRelease 
 At least one invalid signature was encountered.
  W: Failed to fetch http://mirrors.kernel.org/ubuntu/dists/yakkety/InRelease  
At least one invalid signature was encountered.
  W: Failed to fetch 
http://mirrors.kernel.org/ubuntu/dists/yakkety-updates/InRelease  At least one 
invalid signature was encountered.
  W: Failed to fetch 
http://mirrors.kernel.org/ubuntu/dists/yakkety-security/InRelease  At least one 
invalid signature was encountered.
  W: Failed to fetch 
http://mirrors.kernel.org/ubuntu/dists/yakkety-proposed/InRelease  At least one 
invalid signature was encountered.
  W: Failed to fetch 
http://archive.canonical.com/ubuntu/dists/yakkety/InRelease  At least one 
invalid signature was encountered.
  W: Failed to fetch http://mirrors.kernel.org/ubuntu/dists/zesty/InRelease  At 
least one invalid signature was encountered.
  W: Failed to fetch 
http://mirrors.kernel.org/ubuntu/dists/zesty-updates/InRelease  At least one 
invalid signature was encountered.
  W: Failed to fetch 
http://mirrors.kernel.org/ubuntu/dists/zesty-security/InRelease  At least one 
invalid signature was encountered.
  W: Failed to fetch 
http://mirrors.kernel.org/ubuntu/dists/zesty-proposed/InRelease  At least one 
invalid signature was encountered.
  W: Failed to fetch http://archive.canonical.com/ubuntu/dists/zesty/InRelease  
At least one invalid signature was encountered.
  W: Failed to fetch http://ftp.debian.org/debian/dists/unstable/InRelease  At 
least one invalid signature was encountered.
  W: Failed to fetch http://ftp.debian.org/debian/dists/testing/InRelease  At 
least one invalid signature was encountered.
  W: Failed to fetch 
http://ftp.debian.org/debian/dists/jessie-updates/InRelease  At least one 
invalid signature was encountered.
  W: Failed to fetch http://security.debian.org/dists/jessie/updates/InRelease  
At least one invalid signature was encountered.
  W: Failed to fetch 
http://ftp.debian.org/debian/dists/wheezy-updates/InRelease  At least one 
invalid signature was encountered.
  W: Failed to fetch http://security.debian.org/dists/wheezy/updates/InRelease  
At least one invalid signature was encountered.
  W: Failed to fetch http://mirrors.kernel.org/ubuntu/dists/precise/Release.gpg 
 At least one invalid signature was encountered.
  W: Failed to fetch http://mirrors.kernel.org/ubuntu/dists/trusty/Release.gpg  
At least one invalid signature was encountered.
  W: Failed to fetch 
http://archive.canonical.com/ubuntu/dists/precise/Release.gpg  At least one 
invalid signature was encountered.
  W: Failed to fetch 
http://archive.canonical.com/ubuntu/dists/trusty/Release.gpg  At least one 
invalid signature was encountered.
  W: Failed to fetch http://ftp.debian.org/debian/dists/jessie/Release.gpg  At 
least one invalid signature was encountered.
  W: Failed to fetch http://ftp.debian.org/debian/dists/wheezy/Release.gpg  At 
least one invalid signature was encountered.
  W: Some index files failed to download. They have been ignored, or old ones 
used instead.
  Reading package lists... Done
  Building dependency tree
  Reading state information... Done
  Calculating upgrade... Done
  The following packages were automatically installed and are no longer 
required:
    linux-headers-4.4.0-21 linux-headers-4.4.0-21-generic 
linux-headers-4.4.0-22 linux-headers-4.4.0-22-generic
    linux-headers-4.4.0-24 linux-headers-4.4.0-24-generic 
linux-headers-4.4.0-28 linux-headers-4.4.0-28-generic
    linux-headers-4.4.0-31 linux-headers-4.4.0-31-generic 
linux-headers-4.4.0-34 linux-headers-4.4.0-34-generic
    linux-headers-4.4.0-36 linux-headers-4.4.0-36-generic 
linux-headers-4.4.0-38 linux-headers-4.4.0-38-generic
    linux-image-4.4.0-21-generic linux-image-4.4.0-22-generic 
linux-image-4.4.0-24-generic
    linux-image-4.4.0-28-generic linux-image-4.4.0-31-generic 
linux-image-4.4.0-34-generic
    linux-image-4.4.0-36-generic linux-image-4.4.0-38-generic
  Use 'sudo apt autoremove' to remove them.
  0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

  I'll attach the full terminal log soon.

  Thanks

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: apt 1.2.15
  ProcVersionSignature: Ubuntu 4.4.0-45.66-generic 4.4.21
  Uname: Linux 4.4.0-45-generic x86_64
  NonfreeKernelModules: zfs zunicode zcommon znvpair zavl
  ApportVersion: 2.20.1-0ubuntu2.1
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Wed Nov 16 12:29:54 2016
  InstallationDate: Installed on 2012-10-18 (1490 days ago)
  InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 
(20120823.1)
  SourcePackage: apt
  UpgradeStatus: Upgraded to xenial on 2016-04-30 (200 days ago)

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