Re: sudo disappears after latest update

[Tim]

Allegedly, on or about 10 February 2016, Patrick O'Callaghan sent:
> I prefer to type less rather than more :-) 

Groan...

-- 
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Linux 3.9.10-100.fc17.x86_64 #1 SMP Sun Jul 14 01:31:27 UTC 2013 x86_64

Boilerplate:  All mail to my mailbox is automatically deleted, there is
no point trying to privately email me, I only get to see the messages
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This email has been brought to you by beetwix. Mmm, spewy! Get some into
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Re: sudo disappears after latest update

[Tim]

Allegedly, on or about 10 February 2016, jd1008 sent:
> I am sorry to burst the bubble that was perpetrated by Sun
> Microsystems. I worked at Sun Microsystems as a contractor and talked
> to a very senior developer at Menlo Park. I knew this developer from
> working with him in a previous company. Under my oath never to reveal
> his name, he clued me in that the fictitious "sandbox" was the entire
> system. 

I'd go along with that, I never believed the sandbox thing.  After all,
you can upload any file of your choosing through a Java thing in a
website, and it could save a file to anywhere you selected.  That's
hardly sandboxed.

And, if you went through the Java preferences, on those browsers that
gave you an extensive interface.  You could select all sorts of breakout
allowances, many of which were preset to allowed.

-- 
[tim@localhost ~]$ uname -rsvp
Linux 3.9.10-100.fc17.x86_64 #1 SMP Sun Jul 14 01:31:27 UTC 2013 x86_64

Boilerplate:  All mail to my mailbox is automatically deleted, there is
no point trying to privately email me, I only get to see the messages
posted to the mailing list.

Next time your service provider asks you to reboot your equipment, ask
them to reboot theirs, first.



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Re: sudo disappears after latest update

[Joe Zeff]

On 02/10/2016 08:13 PM, Joseph Loo wrote:

I am a little late in the discussion. Is your username in the wheel group?


Mine isn't because I don't use sudo.  The original poster of this thread 
is in the wheel group, I believe.

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Re: sudo disappears after latest update

[Joseph Loo]

On 02/10/2016 08:48 AM, Joe Zeff wrote:
> On 02/10/2016 04:53 AM, Timothy Murphy wrote:
>> Surely this takes substantially more time than sudo?
>> Presumably you have to give the argument in quotes,
>> and then give the password?
>>
> 
> So?  Time is not everything, and being retired, I have all that I need.
> 
>> And doesn't it give an alternative way for the hacker
>> to get the superuser password, eg by key-logging?
>> So is it even safer in the end?
> 
> If the hacker's gotten through my firewall and installed a key logger,
> it's already too late.
I am a little late in the discussion. Is your username in the wheel group?

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Re: sudo disappears after latest update

[jd1008]

On 02/10/2016 02:45 PM, Patrick O'Callaghan wrote:

On Wed, 2016-02-10 at 10:53 -0700, jd1008 wrote:

On 02/10/2016 10:27 AM, Patrick O'Callaghan wrote:

On Wed, 2016-02-10 at 10:17 -0700, jd1008 wrote:

A malefic website can and does user JS to fork out processes that
can
sudo whatever they want.

Are you sure? If so, please give a reference.

poc

Some years ago, the reference came directly from google website
analysis
(obtained via the noscript add-on).
to paraphrase what I read then (as I am sorry I did not keep that
link),
stated
 it installs malware without the user's knowledge or permission


I will strive to locate that analysis and share it with th list.

Unless of course, it has been sanitized or removed - because google
re-analyzes websites
once every 90 days.

I suspect you're thinking of a bug in some earlier version of JS (or
Java). Normally these things are supposed to run in a sandbox precisely
to prevent this. That's probably the main reason Google has just
announced they'll be blocking Flash content in the near future, as it's
notorious for this kind of problem.

poc

I am sorry to burst the bubble that was perpetrated by Sun Microsystems.
I worked at Sun Microsystems as a contractor and talked to a very senior
developer at Menlo Park. I knew this developer from working with him in
a previous company. Under my oath never to reveal his name, he clued me in
that the fictitious "sandbox" was the entire system. Sun was clever to 
use the

term sandbox as a subterfuge for the silicon of the chips.
This "sandbox=entire system" was confirmed to me in an email from another
very senior developer who is still on this list, but will not expose his 
name.

He confirmed that the sandbox is the entirety of the system.
Reason why some people will go to email flame wars on this issue is because
either it is their penny at stake, or they are obeying their superiors.
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Re: Fedora 23 KDE Desktop sharing

[Rick Stevens]

On 02/10/2016 12:30 PM, Gary Baribault wrote:

You are a champ!!! Worked first time. Thanks and thanks to the community!


Glad to help!


On 10/02/16 03:02 PM, Rick Stevens wrote:

On 02/10/2016 11:07 AM, Gary Baribault wrote:

Hello All,

  I've been running Fedore for years, and it used to be I could just
walk the menus and share my desktop. That doesn't seem to work any more.
I've googled until my fingers bled... I can get VNCServer up and running
but when I access it from another machine I get a desktop but it's a new
desktop. I want to access the existing desktop from another computer...

I know, it's dangerous, but my FW to the internet is a CentOS box with
SSH and to get to my desktop you need to ssh to my FW with proper
credentials, and forward a tunnel to my desktop and then log in there as
well, so I'm comfortable with the security.

So, how do I set it up to share the existing desktop?


You need to a) make sure you've installed the "tigervnc-server-module"
RPM (which provides the /usr/lib64/xorg/modules/extensions/libvnc.so
module); and b) add the "vnc" module to X.

To do the latter, I have a file:

 /etc/X11/xorg.conf.d/00-system-setup-vnc.conf

that contains this content:

 # This file was manually created by Rick Stevens
 Section "Module"
 Load "vnc"
 EndSection

 Section "Screen"
 Identifier "Screen0"
 Device "Videocard0"
 Option "SecurityTypes" "VncAuth"
 Option "UserPasswdVerifier" "VncAuth"
 Option "passwordfile" "/path/to/your/vncpasswd/file"
 EndSection

Obviously, replace "/path/to/your/vncpasswd/file" with the appropriate
stuff (the double quotes MUST be there) and you'll need to create
that password file and password using

 vncpasswd /path/to/your/vncpasswd/file

Then reboot and you SHOULD be able to just "vncviewer remotehostname",
enter the password you used for the "vncpasswd" command and the main
main desktop should appear (assuming your firewall permits incoming
connections for that port, typically TCP port 5900).

You can also tunnel the remote VNC session via ssh:

 vncviewer --via user@hostname hostname

You'd need to put in the ssh password first, then the VNC password.
I do this to access my desktop at home (my firewall only permits
incoming ssh sessions from my office IP or my internal home network).

Alternately, you can use something like TeamViewer. It's up to you.

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Re: sudo disappears after latest update

[Patrick O'Callaghan]

On Wed, 2016-02-10 at 10:53 -0700, jd1008 wrote:
> 
> On 02/10/2016 10:27 AM, Patrick O'Callaghan wrote:
> > On Wed, 2016-02-10 at 10:17 -0700, jd1008 wrote:
> > > A malefic website can and does user JS to fork out processes that
> > > can
> > > sudo whatever they want.
> > Are you sure? If so, please give a reference.
> > 
> > poc
> Some years ago, the reference came directly from google website
> analysis 
> (obtained via the noscript add-on).
> to paraphrase what I read then (as I am sorry I did not keep that
> link), 
> stated
>  it installs malware without the user's knowledge or permission
> 
> 
> I will strive to locate that analysis and share it with th list.
> 
> Unless of course, it has been sanitized or removed - because google 
> re-analyzes websites
> once every 90 days.

I suspect you're thinking of a bug in some earlier version of JS (or
Java). Normally these things are supposed to run in a sandbox precisely
to prevent this. That's probably the main reason Google has just
announced they'll be blocking Flash content in the near future, as it's
notorious for this kind of problem.

poc
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Re: Lan connection problem -

[Tom Rivers]

On 2/10/2016 12:35 PM, Bob Goodwin wrote:
Note: This morning's tests are using the original Linksys E3000 router 
and Tomato 1.28 which was in use when the problem first appeared. Just 
thought I needed to go back and reassure myself that the replacement 
Buffalo/OpenWRT router wasn't introducing new problems.


I was under the impression that your router was the Fedora 23 box - now 
this is making a little more sense.  I notice you're using custom 
firmware on those devices and it makes me wonder whether they might play 
a role in some way.


The next thing I would try would be to wire the Fedora system and one of 
your other devices to the router and see if a router reboot affects the 
connectivity between the system and the device.  This procedure 
simplifies the problem set by removing the wireless piece of the 
puzzle.  If rebooting the router affects connectivity between the two 
wired devices, then you might have a problem with the router's switch.  
To confirm this you can substitute a simple switch for the router, 
connect both the system and the device to it, check connectivity, reboot 
the switch and check connectivity again - rebooting the switch should 
have no effect and the systems should be able to interact with each 
other consistently.


If rebooting the router doesn't affect the connectivity of the wired 
system and another wired device, then the problem might be with the 
router's wireless capability and possibly with how the system and other 
devices interact with it.



Tom
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Re: sudo disappears after latest update

[Joe Zeff]

On 02/10/2016 11:31 AM, Tom H wrote:

Your malefic JS will still need the user's password to run "sudo some_command".


Not if you've set sudo up not to need a password.
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Re: Thunderbird problem/question

[jd1008]

On 02/10/2016 12:15 PM, Gordon Messmer wrote:

On 02/10/2016 10:10 AM, jd1008 wrote:
How can I revert it back to original expected behavior? 


View -> Layout -> Message Pane

Is it enabled/checked?
In message pane, there appear a bunch of tabs at bottom, one of which is 
labeled More

Clicking on More, I see that the selection Open in Conversation
is grayed out. The other selections are Open in New Window and Open in 
New Tab.

But the message still is not displayed.
So, something is awry.
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Re: Fedora 23 KDE Desktop sharing

[Gary Baribault]

You are a champ!!! Worked first time. Thanks and thanks to the community!

Gary B



On 10/02/16 03:02 PM, Rick Stevens wrote:
> On 02/10/2016 11:07 AM, Gary Baribault wrote:
>> Hello All,
>>
>>  I've been running Fedore for years, and it used to be I could just
>> walk the menus and share my desktop. That doesn't seem to work any more.
>> I've googled until my fingers bled... I can get VNCServer up and running
>> but when I access it from another machine I get a desktop but it's a new
>> desktop. I want to access the existing desktop from another computer...
>>
>> I know, it's dangerous, but my FW to the internet is a CentOS box with
>> SSH and to get to my desktop you need to ssh to my FW with proper
>> credentials, and forward a tunnel to my desktop and then log in there as
>> well, so I'm comfortable with the security.
>>
>> So, how do I set it up to share the existing desktop?
>
> You need to a) make sure you've installed the "tigervnc-server-module"
> RPM (which provides the /usr/lib64/xorg/modules/extensions/libvnc.so
> module); and b) add the "vnc" module to X.
>
> To do the latter, I have a file:
>
> /etc/X11/xorg.conf.d/00-system-setup-vnc.conf
>
> that contains this content:
>
> # This file was manually created by Rick Stevens
> Section "Module"
> Load "vnc"
> EndSection
>
> Section "Screen"
> Identifier "Screen0"
> Device "Videocard0"
> Option "SecurityTypes" "VncAuth"
> Option "UserPasswdVerifier" "VncAuth"
> Option "passwordfile" "/path/to/your/vncpasswd/file"
> EndSection
>
> Obviously, replace "/path/to/your/vncpasswd/file" with the appropriate
> stuff (the double quotes MUST be there) and you'll need to create
> that password file and password using
>
> vncpasswd /path/to/your/vncpasswd/file
>
> Then reboot and you SHOULD be able to just "vncviewer remotehostname",
> enter the password you used for the "vncpasswd" command and the main
> main desktop should appear (assuming your firewall permits incoming
> connections for that port, typically TCP port 5900).
>
> You can also tunnel the remote VNC session via ssh:
>
> vncviewer --via user@hostname hostname
>
> You'd need to put in the ssh password first, then the VNC password.
> I do this to access my desktop at home (my firewall only permits
> incoming ssh sessions from my office IP or my internal home network).
>
> Alternately, you can use something like TeamViewer. It's up to you.
> --
> - Rick Stevens, Systems Engineer, AllDigitalri...@alldigital.com -
> - AIM/Skype: therps2ICQ: 226437340   Yahoo: origrps2 -
> --
> -Brain:  The organ with which we think that we think.-
> --

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Re: Fedora 23 KDE Desktop sharing

[Rex Dieter]

Gary Baribault wrote:

> Hello All,
> 
> I've been running Fedore for years, and it used to be I could just
> walk the menus and share my desktop. That doesn't seem to work any more.
> I've googled until my fingers bled... I can get VNCServer up and running
> but when I access it from another machine I get a desktop but it's a new
> desktop. I want to access the existing desktop from another computer...
> 
> I know, it's dangerous, but my FW to the internet is a CentOS box with
> SSH and to get to my desktop you need to ssh to my FW with proper
> credentials, and forward a tunnel to my desktop and then log in there as
> well, so I'm comfortable with the security.
> 
> So, how do I set it up to share the existing desktop?

The easiest way (imo) is probably to install and run krfb

-- Rex

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Re: Fedora 23 KDE Desktop sharing

[Rick Stevens]

On 02/10/2016 11:07 AM, Gary Baribault wrote:

Hello All,

 I've been running Fedore for years, and it used to be I could just
walk the menus and share my desktop. That doesn't seem to work any more.
I've googled until my fingers bled... I can get VNCServer up and running
but when I access it from another machine I get a desktop but it's a new
desktop. I want to access the existing desktop from another computer...

I know, it's dangerous, but my FW to the internet is a CentOS box with
SSH and to get to my desktop you need to ssh to my FW with proper
credentials, and forward a tunnel to my desktop and then log in there as
well, so I'm comfortable with the security.

So, how do I set it up to share the existing desktop?


You need to a) make sure you've installed the "tigervnc-server-module"
RPM (which provides the /usr/lib64/xorg/modules/extensions/libvnc.so
module); and b) add the "vnc" module to X.

To do the latter, I have a file:

/etc/X11/xorg.conf.d/00-system-setup-vnc.conf

that contains this content:

# This file was manually created by Rick Stevens
Section "Module"
Load "vnc"
EndSection

Section "Screen"
Identifier "Screen0"
Device "Videocard0"
Option "SecurityTypes" "VncAuth"
Option "UserPasswdVerifier" "VncAuth"
Option "passwordfile" "/path/to/your/vncpasswd/file"
EndSection

Obviously, replace "/path/to/your/vncpasswd/file" with the appropriate
stuff (the double quotes MUST be there) and you'll need to create
that password file and password using

vncpasswd /path/to/your/vncpasswd/file

Then reboot and you SHOULD be able to just "vncviewer remotehostname",
enter the password you used for the "vncpasswd" command and the main
main desktop should appear (assuming your firewall permits incoming
connections for that port, typically TCP port 5900).

You can also tunnel the remote VNC session via ssh:

vncviewer --via user@hostname hostname

You'd need to put in the ssh password first, then the VNC password.
I do this to access my desktop at home (my firewall only permits
incoming ssh sessions from my office IP or my internal home network).

Alternately, you can use something like TeamViewer. It's up to you.
--
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- AIM/Skype: therps2ICQ: 226437340   Yahoo: origrps2 -
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Re: sudo disappears after latest update

[Rick Stevens]

On 02/10/2016 11:28 AM, Tom H wrote:

On Wed, Feb 10, 2016 at 4:45 PM, Ranjan Maitra
 wrote:

On Wed, 10 Feb 2016 16:24:44 +0100 Tom H  wrote:


root's presumably disabled on the OP's box so rather than change this
setup, the OP should run "visudo -f /etc/sudoers.d/maitra" after
"chroot /fedora" (or "systemd-nspawn -D /fedora") to create the
following line in "/etc/sudoers.d/maitra":

maitra ALL=(ALL) ALL


Thanks! This is exactly what I did.


You're welcome.

I hope that you can now figure out why sudo stopped working for maitra.


Look at the dnf logs and look for ".rpmnew" files as well.
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Re: sudo disappears after latest update

[Tom H]

On Wed, Feb 10, 2016 at 6:17 PM, jd1008  wrote:
> On 02/10/2016 08:24 AM, Tom H wrote:
>>
>> root's presumably disabled on the OP's box so rather than change this
>> setup, the OP should run "visudo -f /etc/sudoers.d/maitra" after
>> "chroot /fedora" (or "systemd-nspawn -D /fedora") to create the
>> following line in "/etc/sudoers.d/maitra":
>>
>> maitra ALL=(ALL) ALL
>
> The problem with allowing the user to be effectively root (via sudoers) is
> that
> ubiquotous browser. I have zero faith in browsers. No, not 0, but -infinity
> .
> A malefic website can and does user JS to fork out processes that can sudo
> whatever they want.
> This is why broswers should be set to suid some user other than the
> logged-in user,
> and having no privileges outside it's own directory. This would be like a
> jail.
> Many of you already know how to set up such a jail.

Your malefic JS will still need the user's password to run "sudo some_command".
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Re: sudo disappears after latest update

[Tom H]

On Wed, Feb 10, 2016 at 4:45 PM, Ranjan Maitra
 wrote:
> On Wed, 10 Feb 2016 16:24:44 +0100 Tom H  wrote:
>>
>> root's presumably disabled on the OP's box so rather than change this
>> setup, the OP should run "visudo -f /etc/sudoers.d/maitra" after
>> "chroot /fedora" (or "systemd-nspawn -D /fedora") to create the
>> following line in "/etc/sudoers.d/maitra":
>>
>> maitra ALL=(ALL) ALL
>
> Thanks! This is exactly what I did.

You're welcome.

I hope that you can now figure out why sudo stopped working for maitra.
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Re: Thunderbird problem/question

[Gordon Messmer]

On 02/10/2016 10:10 AM, jd1008 wrote:
How can I revert it back to original expected behavior? 


View -> Layout -> Message Pane

Is it enabled/checked?
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Fedora 23 KDE Desktop sharing

[Gary Baribault]

Hello All,

I've been running Fedore for years, and it used to be I could just
walk the menus and share my desktop. That doesn't seem to work any more.
I've googled until my fingers bled... I can get VNCServer up and running
but when I access it from another machine I get a desktop but it's a new
desktop. I want to access the existing desktop from another computer...

I know, it's dangerous, but my FW to the internet is a CentOS box with
SSH and to get to my desktop you need to ssh to my FW with proper
credentials, and forward a tunnel to my desktop and then log in there as
well, so I'm comfortable with the security.

So, how do I set it up to share the existing desktop?

Gary B

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Thunderbird problem/question

[jd1008]

I caused a problem for myself in TB (using a different email account).

By accident I had clicked on "Quick Filter", without noticing I had done 
that.


Then I had proceeded to highlight all messages in Inbox in order to move 
them to

another folder.
As soon as I realized I had done that, I did not proceed with the  move.

But now, clicking on any message (be it in Inbox or in Sent) the message is
not displayed.

If I double click on a message, then it is displayed in an external 
window of TB.


How can I revert it back to original expected behavior?

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Re: sudo disappears after latest update

[jd1008]

On 02/10/2016 10:27 AM, Patrick O'Callaghan wrote:

On Wed, 2016-02-10 at 10:17 -0700, jd1008 wrote:

A malefic website can and does user JS to fork out processes that can
sudo whatever they want.

Are you sure? If so, please give a reference.

poc
Some years ago, the reference came directly from google website analysis 
(obtained via the noscript add-on).
to paraphrase what I read then (as I am sorry I did not keep that link), 
stated

 it installs malware without the user's knowledge or permission 

I will strive to locate that analysis and share it with th list.

Unless of course, it has been sanitized or removed - because google 
re-analyzes websites

once every 90 days.




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Re: Lan connection problem -

[Bob Goodwin]

On 02/10/16 09:44, Tom Rivers wrote:

On 2/9/2016 6:01 PM, Bob Goodwin wrote:
Now to add to the confusion I just 
tried an F23 portable that doesn't 
get updated as often and it connects 
to the camera 192.168.1.52 that this 
box10 can't as shown above. I will 
try booting another computer to 
Fedora 22 and see if it still works 
as before ... I suspect that perhaps 
something may have changed in network 
manager?


If I understand what you're saying, 
the following conditions are true:


- router reboot makes router unable to 
connect to other devices on the LAN 
that connect to it via wireless
- reboot of devices restores 
connectivity to router

- devices have static IP addresses on LAN

.
The first three items are true.
- when devices are unable to 
communicate with router they can 
communicate with other devices on the 
network

.
I do not think the last statement is 
true but the cameras and the printer do 
not normally communicate between 
themselves, I guess "I dunno?"


A sticking point for me, assuming I am 
not missing something, is that other 
devices can communicate with each 
other over the wireless link provided 
by the router but the router can't see 
any of them. That is really strange.  
I would recommend restarting the 
firewall service but the fact 
rebooting a device makes things work 
again seems to indicate the firewall 
isn't the problem.


The fact rebooting a device, an 
external entity, causes the router to 
be able to communicate with it again 
might indicate that reconnecting to 
the wireless access point is what 
kicks things back into gear.  I know 
that a reboot will do this by default 
(grasping at straws here), but have 
you tried disabling/enabling the 
wireless service on the router after 
it has fully rebooted to see if that 
has any effect?  Maybe the run level 
it is being started at has something 
to do with the problem.  Also, it 
might be interesting to execute "arp 
-a" on the router both before and 
after it reboots to see what results 
you get.



.

[root@Box10 bobg]# arp -a 192.168.1.1
RT-C0C1C04C27FE (192.168.1.1) at 
c0:c1:c0:4c:27:fe [ether] on enp1s0


Reboot router:
[root@Box10 bobg]# arp -a 192.168.1.1
RT-C0C1C04C27FE (192.168.1.1) at 
c0:c1:c0:4c:27:fe [ether] on enp1s0


Note: This morning's tests are using the 
original Linksys E3000 router and Tomato 
1.28 which was in use when the problem 
first appeared. Just thought I needed to 
go back and reassure myself that the 
replacement Buffalo/OpenWRT router 
wasn't introducing new problems.


The more I look into this the more 
puzzled I become, presently the router 
is connected to my portable which I just 
booted as a trial, and an Apple Watch, 
but it wont connect to my Brother 
Printer. That will require a wired 
connection to investigate. It also does 
not connect to the remote "IP" cameras 
until I "re-cycle" the ac power, I just 
did that on the nearest one and it came 
up, but not the printer.


I may have to live with what I have 
until F-24 comes along.


Thanks for considering this,

Bob


Tom



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http://www.qrz.com/db/W2BOD
box10  FEDORA-23/64bit LINUX XFCE POP3

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Re: sudo disappears after latest update

[Patrick O'Callaghan]

On Wed, 2016-02-10 at 10:17 -0700, jd1008 wrote:
> A malefic website can and does user JS to fork out processes that can
> sudo whatever they want.

Are you sure? If so, please give a reference.

poc
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Re: sudo disappears after latest update

[jd1008]

On 02/10/2016 08:24 AM, Tom H wrote:

On Tue, Feb 9, 2016 at 6:02 PM, jd1008  wrote:

To the OP of this thread:

Why not

boot a live CD or DVD

Once booted,
su - root

mkdir /fedora
mount /dev/sd ??  /fedora   (??  are something like a0  or a1 ...etc ... the
name of your hard drive boot partition)

chroot /fedora

passwd root

root's presumably disabled on the OP's box so rather than change this
setup, the OP should run "visudo -f /etc/sudoers.d/maitra" after
"chroot /fedora" (or "systemd-nspawn -D /fedora") to create the
following line in "/etc/sudoers.d/maitra":

maitra ALL=(ALL) ALL
The problem with allowing the user to be effectively root (via sudoers) 
is that
ubiquotous browser. I have zero faith in browsers. No, not 0, but 
-infinity .

A malefic website can and does user JS to fork out processes that can sudo
whatever they want.
This is why broswers should be set to suid some user other than the 
logged-in user,
and having no privileges outside it's own directory. This would be like 
a jail.

Many of you already know how to set up such a jail.


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Re: sudo disappears after latest update

[Patrick O'Callaghan]

On Wed, 2016-02-10 at 08:48 -0800, Joe Zeff wrote:
> On 02/10/2016 04:53 AM, Timothy Murphy wrote:
> > Surely this takes substantially more time than sudo?
> > Presumably you have to give the argument in quotes,
> > and then give the password?
> >
> 
> So?  Time is not everything, and being retired, I have all that I
> need.

Also retired, for what it's worth. All the same I prefer to type less
rather than more :-)

poc
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Re: sudo disappears after latest update

[Joe Zeff]

On 02/10/2016 04:53 AM, Timothy Murphy wrote:

Surely this takes substantially more time than sudo?
Presumably you have to give the argument in quotes,
and then give the password?



So?  Time is not everything, and being retired, I have all that I need.


And doesn't it give an alternative way for the hacker
to get the superuser password, eg by key-logging?
So is it even safer in the end?


If the hacker's gotten through my firewall and installed a key logger, 
it's already too late.

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Re: sudo disappears after latest update

[Ranjan Maitra]

On Wed, 10 Feb 2016 16:24:44 +0100 Tom H  wrote:

> On Tue, Feb 9, 2016 at 6:02 PM, jd1008  wrote:
> >
> > To the OP of this thread:
> >
> > Why not
> >
> > boot a live CD or DVD
> >
> > Once booted,
> > su - root
> >
> > mkdir /fedora
> > mount /dev/sd ??  /fedora   (??  are something like a0  or a1 ...etc ... the
> > name of your hard drive boot partition)
> >
> > chroot /fedora
> >
> > passwd root
> 
> root's presumably disabled on the OP's box so rather than change this
> setup, the OP should run "visudo -f /etc/sudoers.d/maitra" after
> "chroot /fedora" (or "systemd-nspawn -D /fedora") to create the
> following line in "/etc/sudoers.d/maitra":
> 
> maitra ALL=(ALL) ALL

Thanks! This is exactly what I did.

Best wishes,
Ranjan

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Re: zfs module not loaded on fedora 23

[Chris Murphy]

On Wed, Feb 10, 2016, 2:05 AM thibaut noah  wrote:

> @maikel : Not the same issue mate, this is the first time ever i install
> zfsonlinux and my packages are for fedora 23.
> I used the new packages available through github (specific for fedora 23),
> the module could not build for whathever reason, seems that it is looking
> for files i do not have since a genius decided that when you update the
> system why not update the kernel itself #yolo.
>


You aren't giving us any useful information. There is no such error as
"could not build for whatever reason". Give us the actual failure message
instead of being coy about it.

Best. Star in a new Terminal window, follow their two steps, copy paste the
entire result to fpaste.org, and then post the URL here.



So i'm screwed, i have absolutly zero knowledge in kernel so i have no idea
> how to get those files back (something like kernel-header, sources etc) and
> i have to boot on my previous kernel otherwise i cannot launch my qemu vm
> which uses vfio.
>


Hopefully you filled a kernel bug on that?

In the meantime you need to use --exclude=kernel whenever you do system
updates or it will update the kernel and kernel-headers.

And there can be only one kernel-headers version installed at a time. This
can get tricky (OK annoying).

What do you get for

dnf downgrade kernel-headers

Does it correctly offer to install the version for the kernel needed for
vfio? If yes, let dnf downgrade kernel-headers. Then retry reinstalling ZFS
stuff.

Next look at man dnf.conf to see how you can add an exclude for the kernel,
until the kernel vfio bug gets fixed.


Chris Murphy
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Re: sudo disappears after latest update

[Tom H]

On Tue, Feb 9, 2016 at 6:02 PM, jd1008  wrote:
>
> To the OP of this thread:
>
> Why not
>
> boot a live CD or DVD
>
> Once booted,
> su - root
>
> mkdir /fedora
> mount /dev/sd ??  /fedora   (??  are something like a0  or a1 ...etc ... the
> name of your hard drive boot partition)
>
> chroot /fedora
>
> passwd root

root's presumably disabled on the OP's box so rather than change this
setup, the OP should run "visudo -f /etc/sudoers.d/maitra" after
"chroot /fedora" (or "systemd-nspawn -D /fedora") to create the
following line in "/etc/sudoers.d/maitra":

maitra ALL=(ALL) ALL
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Re: Cannot Boot Fedora 23 live media on Lenovo C540

[Chris Murphy]

Fixing bugs is always worthwhile.

If neither Fedora 22 or 23 install media can be booted, but Ubuntu can,
then i suspect it's not kernel related.

Do you get different results when you use dd to create installer media?
That really is the most reliable way to create media. But also dd and
livecd-iso-to-disk create very different install media. Both should work.
But the three finger salute with litd appears to not work on your system
for as yet unknown reasons.

My suggestion:
- Create the installer media with dd
- Find a reset to defaults option in the firmware setup, and reset the
firmware.
- Make sure you have the latest firmware version from the manufacturer.
- When you get to the boot menu, the UEFI bootloader will be white text on
a black background, and e is used to edit boot entries. A gray background
or color text is the BIOS borrower, tab key edits boot entries. You really
want the former, fewer layers.

- Select the first boot option, e to edit, navigate to the linuxefi line,
find the parameters 'quiet rhgb' and delete them both. Then use with F10 or
Ctrl-x to boot this edited entry. Removing those will show more text on
screen, and maybe the failure cause becomes more obvious.

Also, report what does happen, rather than what doesn't.


Chris Murphy
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Re: Lan connection problem -

[Tom Rivers]

On 2/9/2016 6:01 PM, Bob Goodwin wrote:
Now to add to the confusion I just tried an F23 portable that doesn't 
get updated as often and it connects to the camera 192.168.1.52 that 
this box10 can't as shown above. I will try booting another computer 
to Fedora 22 and see if it still works as before ... I suspect that 
perhaps something may have changed in network manager?


If I understand what you're saying, the following conditions are true:

- router reboot makes router unable to connect to other devices on the 
LAN that connect to it via wireless

- reboot of devices restores connectivity to router
- devices have static IP addresses on LAN
- when devices are unable to communicate with router they can 
communicate with other devices on the network


A sticking point for me, assuming I am not missing something, is that 
other devices can communicate with each other over the wireless link 
provided by the router but the router can't see any of them. That is 
really strange.  I would recommend restarting the firewall service but 
the fact rebooting a device makes things work again seems to indicate 
the firewall isn't the problem.


The fact rebooting a device, an external entity, causes the router to be 
able to communicate with it again might indicate that reconnecting to 
the wireless access point is what kicks things back into gear.  I know 
that a reboot will do this by default (grasping at straws here), but 
have you tried disabling/enabling the wireless service on the router 
after it has fully rebooted to see if that has any effect?  Maybe the 
run level it is being started at has something to do with the problem.  
Also, it might be interesting to execute "arp -a" on the router both 
before and after it reboots to see what results you get.



Tom
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Re: sudo disappears after latest update

[Patrick O'Callaghan]

On Wed, 2016-02-10 at 12:53 +, Timothy Murphy wrote:
> Joe Zeff wrote:
> 
> > I, OTOH, find su -c quite satisfactory, TYVM.
> 
> Surely this takes substantially more time than sudo?
> Presumably you have to give the argument in quotes,
> and then give the password?

My thinking exactly.

> And doesn't it give an alternative way for the hacker
> to get the superuser password, eg by key-logging?
> So is it even safer in the end?

If there's a keylogger, all bets are off anyway, so I wouldn't give
much weight to this as an argument.

poc
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Re: sudo disappears after latest update

[Timothy Murphy]

Joe Zeff wrote:

> I, OTOH, find su -c quite satisfactory, TYVM.

Surely this takes substantially more time than sudo?
Presumably you have to give the argument in quotes,
and then give the password?

And doesn't it give an alternative way for the hacker
to get the superuser password, eg by key-logging?
So is it even safer in the end?

-- 
Timothy Murphy  
gayleard /at/ eircom.net
School of Mathematics, Trinity College, Dublin


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Re: Postfix and PTR record issues

[arnaud gaboury]

On Wed, Feb 10, 2016 at 12:29 AM, Ed Greshko  wrote:
>
>
> On 02/09/16 21:14, arnaud gaboury wrote:
>> Now trying to an external user:
>>
>> % telnet mail.thetradinghall.com 587
>> 
>> ..
>> email from:arnaud.gabo...@thetradinghall.com
>> 502 5.5.2 Error: command not recognized
>> mail from:arnaud.gabo...@thetradinghall.com
>> 250 2.1.0 Ok
>> rcpt to:arnaud.gabo...@gmail.com
>> 454 4.7.1 : Relay access denied
>> ---
>>
>> $ journactl --unit postfix -r
>> 
>> Feb 09 13:47:05 poppy postfix/smtpd[1518]: NOQUEUE: reject: RCPT from
>> unknown[MyPublicIp]: 454 4.7.1 : Relay
>> access denied; from=> Feb 09 13:46:02 poppy postfix/smtpd[1518]: connect from unknown[MyPublicIp]
>> Feb 09 13:46:02 poppy postfix/smtpd[1518]: warning: hostname
>> dsldevice.lan does not resolve to address MyPublicIp
>>
>> ***
>>
>> After some reading, I came to the conclusion I did not setup any PTR
>> record. hostname dsldevice.lan is in fact my gateway (168.192.1.254).
>
> I doubt the problem is the lack of a PTR record.
>
> If you tried the reverse, "mail from x...@gmail.com" to 
> some...@thetradinghall.com chances
> are it would work.

You are right. Sending emails from outside works.

>
> The error message you are getting is "Relay access denied".  This is normally 
> a good thing
> since if the mail server is facing the Internet you'd have what is known as 
> an "open
> relay" which spammers use and would get you blacklisted.
>
> I've not worked with postfix or sendmail for quite some time.  Most recently 
> I worked with
> another MTA which had a concept of "Trusted Domains".  One could define a 
> domain or a
> range of IP addresses where relaying would be allowed.  I don't know if 
> postfix has that
> sort of configuration option.

I will have a closer look at the relay settings.
TY

>
> The other option, and the best one if you plan to use the server as your SMTP 
> host when
> traveling or outside the local network, is to configure your system for SMTP 
> AUTH.  With
> SMTP AUTH a user authenticates to the server and then is allow to send mail 
> anywhere.
>
>
> --
> In reality, some people should stick to running Windows and others should 
> stay away from
> computers altogether.
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Re: zfs module not loaded on fedora 23

[thibaut noah]

@maikel : Not the same issue mate, this is the first time ever i install
zfsonlinux and my packages are for fedora 23.
I used the new packages available through github (specific for fedora 23),
the module could not build for whathever reason, seems that it is looking
for files i do not have since a genius decided that when you update the
system why not update the kernel itself #yolo.
So i'm screwed, i have absolutly zero knowledge in kernel so i have no idea
how to get those files back (something like kernel-header, sources etc) and
i have to boot on my previous kernel otherwise i cannot launch my qemu vm
which uses vfio.

@chris : already did, still waiting for an answer...

2016-02-10 9:44 GMT+01:00 Maikel van Leeuwen 
:

> Hey all,
>
> I ran in the same problem. I removed the ZFS repo of ZFS itself. I
> installed the Fedora version, after that the ZFS pool was unable to be
> mounted (something with dependencies of features).
>
> I then proceeded to remove everything of ZFS on my system and installed
> again the ZFS repository. This turned out to be the winning move. Why? I
> don't know, but the ZFS packages of the repository compiles something. So,
> my bet it does something to the kernel and with the upgrade of Fedora 23 it
> got broken.
>
> Installed packages ATM:
> libnvpair1.x86_64 0.6.5.4-1.fc23
> @zfs
> libuutil1.x86_64  0.6.5.4-1.fc23
> @zfs
> libzfs2.x86_640.6.5.4-1.fc23
> @zfs
> libzpool2.x86_64  0.6.5.4-1.fc23
> @zfs
> spl.x86_640.6.5.4-1.fc23
> @zfs
> spl-dkms.noarch   0.6.5.4-1.fc23
> @zfs
> zfs.x86_640.6.5.4-1.fc23
> @zfs
> zfs-dkms.noarch   0.6.5.4-1.fc23
> @zfs
> zfs-release.noarch1-4.fc23
> @@commandline
>
> Repository:
> [zfs]
> name=ZFS on Linux for Fedora $releasever
> baseurl=http://archive.zfsonlinux.org/fedora/$releasever/$basearch/
> enabled=1
> metadata_expire=7d
> gpgcheck=1
> gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-zfsonlinux
>
> [zfs-source]
> name=ZFS on Linux for Fedora $releasever - Source
> baseurl=http://archive.zfsonlinux.org/fedora/$releasever/SRPMS/
> enabled=0
> gpgcheck=1
> gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-zfsonlinux
>
> [zfs-testing]
> name=ZFS on Linux for Fedora $releasever - Testing
> baseurl=
> http://archive.zfsonlinux.org/fedora-testing/$releasever/$basearch/
> enabled=0
> metadata_expire=7d
> gpgcheck=1
> gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-zfsonlinux
>
> [zfs-testing-source]
> name=ZFS on Linux for Fedora $releasever - Testing Source
> baseurl=http://archive.zfsonlinux.org/fedora-testing/$releasever/SRPMS/
> enabled=0
> gpgcheck=1
> gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-zfsonlinux
>
>
>
> On 02/10/2016 09:28 AM, Chris Murphy wrote:
>
>
>
> On Tue, Feb 9, 2016, 11:58 PM thibaut noah  wrote:
>
>> That's exactly what i did and it ain't working
>
>
>
> I suggest filling an issue ticket with upstream, or ask on their list or
> forum.
>
>
> Chris Murphy
>
>
>
>
> --
> users mailing list
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>
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Re: Postfix and PTR record issues

[arnaud gaboury]

On Wed, Feb 10, 2016 at 6:32 AM, Tim  wrote:
> Allegedly, on or about 09 February 2016, arnaud gaboury sent:
>
>> When looking at my DNS provider (Hurricane Electric), I effectively
>> have no PTR record. I must set one but honestly, I am far from
>> understanding everything about PTR.
>
> Unless you have a unique IP, one that's always assigned solely to you,

That is the case. My IP is fixed and dedicated to me.


> your ISP is unlikely to set a PTR record for you.  Usually, they share
> addresses, one way or another (e.g. dynamic IPs) between their users,
> and PTRs point to their own hostnames.
>
> --
> [tim@localhost ~]$ uname -rsvp
> Linux 3.9.10-100.fc17.x86_64 #1 SMP Sun Jul 14 01:31:27 UTC 2013 x86_64
>
> Boilerplate:  All mail to my mailbox is automatically deleted, there is
> no point trying to privately email me, I only get to see the messages
> posted to the mailing list.
>
>
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Re: zfs module not loaded on fedora 23

[Maikel van Leeuwen]

Hey all,

I ran in the same problem. I removed the ZFS repo of ZFS itself. I
installed the Fedora version, after that the ZFS pool was unable to be
mounted (something with dependencies of features). 

I then proceeded to remove everything of ZFS on my system and installed
again the ZFS repository. This turned out to be the winning move. Why? I
don't know, but the ZFS packages of the repository compiles something.
So, my bet it does something to the kernel and with the upgrade of
Fedora 23 it got broken.

Installed packages ATM:
libnvpair1.x86_64 0.6.5.4-1.fc23   
@zfs   
libuutil1.x86_64  0.6.5.4-1.fc23   
@zfs   
libzfs2.x86_640.6.5.4-1.fc23   
@zfs   
libzpool2.x86_64  0.6.5.4-1.fc23   
@zfs   
spl.x86_640.6.5.4-1.fc23   
@zfs   
spl-dkms.noarch   0.6.5.4-1.fc23   
@zfs   
zfs.x86_640.6.5.4-1.fc23   
@zfs   
zfs-dkms.noarch   0.6.5.4-1.fc23   
@zfs   
zfs-release.noarch1-4.fc23 
@@commandline

Repository:
[zfs]
name=ZFS on Linux for Fedora $releasever
baseurl=http://archive.zfsonlinux.org/fedora/$releasever/$basearch/
enabled=1
metadata_expire=7d
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-zfsonlinux

[zfs-source]
name=ZFS on Linux for Fedora $releasever - Source
baseurl=http://archive.zfsonlinux.org/fedora/$releasever/SRPMS/
enabled=0
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-zfsonlinux

[zfs-testing]
name=ZFS on Linux for Fedora $releasever - Testing
baseurl=http://archive.zfsonlinux.org/fedora-testing/$releasever/$basearch/
enabled=0
metadata_expire=7d
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-zfsonlinux

[zfs-testing-source]
name=ZFS on Linux for Fedora $releasever - Testing Source
baseurl=http://archive.zfsonlinux.org/fedora-testing/$releasever/SRPMS/
enabled=0
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-zfsonlinux


On 02/10/2016 09:28 AM, Chris Murphy wrote:
>
>
> On Tue, Feb 9, 2016, 11:58 PM thibaut noah  > wrote:
>
> That's exactly what i did and it ain't working
>
>
>
> I suggest filling an issue ticket with upstream, or ask on their list
> or forum.
>
>
> Chris Murphy
>
>

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Re: Cannot Boot Fedora 23 live media on Lenovo C540

[R Mercado]

On Mon, 2016-02-08 at 16:14 -0700, Chris Murphy wrote:
> How are you creating the USB stick? How does it fail? The description
> "it fails" isn't helpful because it doesn't tell us what does happen.
> There's no way to know from this description whether it fails to find
> the bootloader (or which one, there's more than one possible).
Hi,

Thanks for writing.

The failure is described in https://bugzilla.redhat.com/show_bug.cgi?id
=1303446 

I generate the USB stick using 

sudo ./livecd-iso-to-disk --efi --reset-mbr --format
'/home/rmercado/Downloads/hj/Fedora-Live-Workstation-x86_64-23-
10.iso'  /dev/sdb

The system freezes after showing a boot menu. It does indeed look like
the UEFI boot menu is different to the non-UEFI menu, at least because
the boot screen font looks like in a type of graphics mode (UEFI boot
menu) instead of text mode (non-UEFI boot menu).

Josh Boyer offers to pursue this in rawhide/Fedora 24 images. I wonder
if it is worthwhile.

Regards,
RM


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Re: zfs module not loaded on fedora 23

[Chris Murphy]

On Tue, Feb 9, 2016, 11:58 PM thibaut noah  wrote:

> That's exactly what i did and it ain't working



I suggest filling an issue ticket with upstream, or ask on their list or
forum.


Chris Murphy
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