Public bug reported:
1 and 2:
```
$ lsb_release -rd
Description: Ubuntu 20.04.2 LTS
Release: 20.04
$ apt-cache policy command-not-found
command-not-found:
Installed: 20.04.4
Candidate: 20.04.4
Version table:
*** 20.04.4 500
500 http://archive.ubuntu.com/ubuntu focal-updates/main amd64 Packages
500 http://archive.ubuntu.com/ubuntu focal-updates/main i386 Packages
100 /var/lib/dpkg/status
20.04.2 500
500 http://archive.ubuntu.com/ubuntu focal/main amd64 Packages
500 http://archive.ubuntu.com/ubuntu focal/main i386 Packages
```
I was trying to connect to psql server. I didn't know what package I
need to install so hoped that the I would get help from the system
itself:
```
$ psql
Command 'psql' not found, but can be installed with:
sudo apt install postgresql-client-common
```
3) What I expected to happen:
I was expecting that after installing postgresql-client-common I would be able
to run the command.
Digging further, I found out that there's only one postgresql-
client-<version> package (postgresql-client-12), and that's not the
latest version of psql. I expect to be suggested to install either
`postgresql-client` or a correct version of `postgresql-
client-<version>` package
4) What happened instead:
I was not able to run command straightaway and had to figure out which package
to install next with no clear help
Here's what happened when I was installing it:
```
$ sudo apt-get install postgresql-client-common
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following NEW packages will be installed:
postgresql-client-common
0 upgraded, 1 newly installed, 0 to remove and 1 not upgraded.
Need to get 28,2 kB of archives.
After this operation, 182 kB of additional disk space will be used.
Get:1 http://archive.ubuntu.com/ubuntu focal-updates/main amd64
postgresql-client-common all 214ubuntu0.1 [28,2 kB]
Fetched 28,2 kB in 0s (93,2 kB/s)
Selecting previously unselected package postgresql-client-common.
(Reading database ... 282382 files and directories currently installed.)
Preparing to unpack .../postgresql-client-common_214ubuntu0.1_all.deb ...
Unpacking postgresql-client-common (214ubuntu0.1) ...
Setting up postgresql-client-common (214ubuntu0.1) ...
Processing triggers for man-db (2.9.1-1) ...
```
Here's the error message:
```
$ psql --host 178.154.223.198 -U user9 db9
Error: You must install at least one postgresql-client-<version> package
```
** Affects: command-not-found (Ubuntu)
Importance: Undecided
Status: New
--
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Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1939412
Title:
command-not-found suggests postgresql-client-common when trying to use
psql for the first time, but this package is useless
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