[SOLVED] sudo issue

zosty · 06-05-2010, 08:53 AM

I've just installed Slackware64 13.1 on my PC and I have a problem with sudo command.
I have added myself to "wheel" group

Code:

wheel:x:10:root,zosty

and I have modified the /etc/sudoers file in order to allow to "wheel" members to run any command with root privileges....

Code:

# sudoers file.
#
# This file MUST be edited with the 'visudo' command as root.
# Failure to use 'visudo' may result in syntax or file permission errors
# that prevent sudo from running.
#
# See the sudoers man page for the details on how to write a sudoers file.
#

# Host alias specification

# User alias specification

# Cmnd alias specification

# Defaults specification

# Runas alias specification

# User privilege specification
root    ALL=(ALL) ALL

# Uncomment to allow people in group wheel to run all commands
%wheel  ALL=(ALL) ALL

# Same thing without a password
# %wheel        ALL=(ALL) NOPASSWD: ALL

# Samples
%users  ALL=/sbin/mount /cdrom,/sbin/umount /cdrom
%users  localhost=/sbin/shutdown -h now

but it doesn't work...
Where is my mistake?
Thanks!
Z

thinknix · 06-05-2010, 09:11 AM

If you run the 'groups' command as user zosty, do you see the wheel group listed in the output? If not, either log out/in again or start a subshell under the new group with 'newgrp wheel'. sudo should then work for you in either case.

zosty · 06-05-2010, 09:18 AM

This is the output to groups:

Quote:

zosty@Zosty:~$ groups
zosty wheel floppy audio video cdrom plugdev power scanner users

So...it should be correct but it still doesn't work.

thinknix · 06-05-2010, 09:24 AM

OK, that is odd...I'm assuming you used visudo to edit the sudoers file? What does the output of 'visudo -c' show you? You should see this:

Code:

root@nix0:~# visudo -c
/etc/sudoers: parsed OK

zosty · 06-05-2010, 09:29 AM

I confirm I used visudo to edit sudoers file.
This is the output:

Quote:

root@Zosty:/home/zosty# visudo -c
/etc/sudoers: parsed OK

forrestt · 06-05-2010, 09:33 AM

And, what is the output of

Code:

ls -la `which sudo`

Forrest

zosty · 06-05-2010, 09:38 AM

It seems correct...

Quote:

root@Zosty:/home/zosty# ls -la `which sudo`
-rws--x--x 1 root root 149088 Apr 20 14:19 /usr/bin/sudo

Z

thinknix · 06-05-2010, 09:46 AM

I'm curious what you see in your /var/log/syslog and on your console when you try to run any command under sudo. If I take myself out of the wheel group, I see this:

Code:

dmaxwell@nix0:~$ sudo ls -l /root/
Password:
dmaxwell is not in the sudoers file.  This incident will be reported.
dmaxwell@nix0:~$
...
Jun  5 10:42:49 nix0 sudo: dmaxwell : user NOT in sudoers ; TTY=pts/3 ; PWD=/home/dmaxwell ; USER=root ; COMMAND=/usr/bin/ls -l /root/

zosty · 06-05-2010, 09:56 AM

OK! I think I have to say sorry for the question...maybe I need to understand better how sudo works!

Anyway, this is the output:

Code:

sudo ls -l /root/
Password:
total 4
drwx------ 2 root root 4096 2010-06-02 20:16 Desktop

The problem is (for example...):

Code:

zosty@Zosty:~$ sudo visudo 
sudo: visudo: command not found
zosty@Zosty:~$ sudo halt
sudo: halt: command not found

So...I thougth was a sudo problem...but it is a Zosty's problem!

thinknix · 06-05-2010, 10:00 AM

Ah, OK, so sudo does work for you. This is just a path issue - just add /sbin, /usr/sbin and maybe /usr/local/sbin/ to your $PATH, or use the absolute paths, like this:

Code:

sudo /sbin/halt

zosty · 06-05-2010, 10:04 AM

Thanks!!!

bgeddy · 06-05-2010, 01:23 PM

Personally I never use sudo and don't really like setting up sudoers. I find it much more convenient to run a command as root with :

Code:

su -c "command"

where command is what I want to run. Admittedly this needs the root password but as it's only me using this it's no problem. This also automatically sets up the paths for the superuser.