Re: Invocation of applications which require root permitions

Jury Levykin <jury@xxxxxxxxxxxxx> · Fri, 06 Jan 2006 12:35:53 +0300

. . .
I don't think so. You both did some job, but no one knows on what type 
of machine you performed and other details, I don't know too much what.

IBM ThinkPad Z60t

I did about 28 installations among 3 or more distributions but 3 
principally. What it leads me to say, is that during the several I did 
with Ubuntu among which half a dozen just for tests and explore the 
install possibilities, expert mode would never ruin a user's 
caracteristics.
About sudoers file, it has to be edited as root so if you can't use your
password it's of no use.

I have root's permissions:
$ su -
Password: **********
#
I can use console tools but can not use X tools.

What to do ? same as Old Rocker did to solve his recent problem with a 
file that he could not reach as root : take a live CD, run the 
terminal as root (no password required in a live CD) mount the / 
partition of your install in the /mnt of the live CD's / then chroot 
it and add a root account :

see on the CategoryDocumentation to find the 'HowToRootSudo'. It look 
like something like that:

$sudo passwd root

or $sudo root passwd I'n not sure anymore.
Then you can reboot and login as user (Jury how did you login as user 
anyhow ?

I login to X session as user without any problem, but I can not to do it 
as root.

I can login to console session (Alt + Ctrl + F2) as root and as user.
From X session (xterm):
----------------------------------
jura@thinkpad:~$ su -
Password:
root@thinkpad:~# synaptic
(synaptic:8219): Gtk-WARNING **: cannot open display:
root@thinkpad:~#
root@thinkpad:~# export DISPLAY=:0.0
root@thinkpad:~#
root@thinkpad:~# synaptic
Xlib: connection to ":0.0" refused by server
Xlib: No protocol specified
(synaptic:8258): Gtk-WARNING **: cannot open display:
root@thinkpad:~#
----------------------------------
What tools or files I need use to solve this problem?
cat /etc/sudoers
# /etc/sudoers
#
# This file MUST be edited with the 'visudo' command as root.
#
# See the man page for details on how to write a sudoers file.
#
# Host alias specification
# User alias specification
# Cmnd alias specification
# Defaults
Defaults        !lecture,tty_tickets,!fqdn
# User privilege specification
root    ALL=(ALL) ALL
Then you can access to administration tools to make things properly 
for your user (change the password to have a new user password I'd say).
When finished, do lock the root account again, for safe :
$sudo -l root
(this one I'm sure to remember).
HowTo chroot ?
#chroot /mnt
HowTo mount "/" in "/mnt" ?
#mount /dev/hdax /mnt
(or sdxx) where x are numbers I don't know...
HowTo see how is your device named in the partitions ?
#mount
HowTo see in what partition you have your "/" ?
#cfdisk /dev/hdx
(or sdx...)
be careful with cfdisk, it's a partitioning tool, so quit with the 
quit option you reach with the direction arrows as soon as you have 
seen the content.

Best greetings, and welcome in the Tux country.

:-)
Joyce Markoll.

Thanks, Jury
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Re: Invocation of applications which require root permitions

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