Locked out of sudo

[Erwin Smout]

When I sudo anything, response is "erwin is not in the sudoers file".

erwin was in the sudoers file yesterday.

How is it possible that this disappears ?

And is it possible to recover ?

[vinnywright]

imposable to know without knowing what you have been doing .

type

groups

in a terminal and see what it spits out.

        [FONT=monospace][COLOR=#000000]vinny@vinny-Bonobo-Extreme:~$ groups [/COLOR]
vinny adm cdrom sudo dip plugdev lpadmin sambashare
[/FONT]

you want to make sure you are in the "adm" group .

if not we can tell you how to get back in.

VINNY

[Feathers McGraw]

you want to make sure you are in the "adm" group .

I don't think the adm group is very important actually, as I understand it it's mainly used for read access to log files without using sudo (very handy on a server, but not essential on a desktop)... or is it used for other things too?

The sudo group is the important one.

[Erwin Smout]

groups output

imposable to know without knowing what you have been doing .

type

groups

in a terminal and see what it spits out.

        [FONT=monospace][COLOR=#000000]vinny@vinny-Bonobo-Extreme:~$ groups [/COLOR]
vinny adm cdrom sudo dip plugdev lpadmin sambashare
[/FONT]

you want to make sure you are in the "adm" group .

if not we can tell you how to get back in.

VINNY

spits out "erwin svn".
I installed SVN yesterday, created a user and group for it, and added my user to the group.
Seems like I erased all the other groups the user participated in.

[Feathers McGraw]

You probably did this:

sudo usermod -G svn erwin

Whereas you wanted to do this:

sudo usermod -a -G svn erwin

The -a appends the group you're adding to the existing list of groups.

Assuming you're using grub, this link should help you boot to a root shell:

http://askubuntu.com/questions/92556...o-a-root-shell

Then as root, you should run something like this:

usermod -a -G erwin,adm,cdrom,sudo,dip,plugdev,lpadmin,sambashare erwin

(based on the groups my user is in).

[vinnywright]

I don't think the adm group is very important actually, as I understand it it's mainly used for read access to log files without using sudo (very handy on a server, but not essential on a desktop)... or is it used for other things too?

The sudo group is the important one.

Humm seams you may be correct ,,,,,,,,,,,,

        [FONT=monospace][COLOR=#000000]# [/COLOR]
# This file MUST be edited with the 'visudo' command as root. 
# 
# Please consider adding local content in /etc/sudoers.d/ instead of 
# directly modifying this file. 
# 
# See the man page for details on how to write a sudoers file. 
# 
Defaults        env_reset 
Defaults        mail_badpass 
Defaults        secure_path="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin" 

# Host alias specification 

# User alias specification 

# Cmnd alias specification 

# User privilege specification 
root    ALL=(ALL:ALL) ALL 

# Members of the admin group may gain root privileges 
%admin ALL=(ALL) ALL 

# Allow members of group sudo to execute any command 
%sudo   ALL=(ALL:ALL) ALL 

# See sudoers(5) for more information on "#include" directives: 

#includedir /etc/sudoers.d

[/FONT]

it used to be "adm" and or "admin" seems sudo group is back as well but I would check the sudoers file on your system (I am on 15.04)to be sure as it has changed through the years .

any way ,,,,,,,,,@erwin you will nead to boot into recovery mode from grub menu and chose root shell then do

mount -o --remount rw /

then

useradd -G adm,sudo,cdrom,dip,plugdev,lpadmin,sambashare,admin erwin

note the space between the last group and your user name.

VINNY

EDIT: Humm the feathery one beet me to it

[kubicle]

usermod -a -G erwin,adm,cdrom,sudo,dip,plugdev,lpadmin,sambashare erwin

(based on the groups my user is in).

You'll probably want to also restore group erwin as the primary group of user erwin

usermod -g erwin erwin

it used to be "adm" and or "admin" seems sudo group is back as well but I would check the sudoers file on your system

Old releases of *buntu used the "admin" as the group ("adm" group has always served a different purpose), but they changed it to the "sudo" group a while back...the "admin" group was kept in sudoers for backwards compatibility.

[Feathers McGraw]

it used to be "adm" and or "admin" seems sudo group is back as well but I would check the sudoers file on your system (I am on 15.04)to be sure as it has changed through the years

I see! You've been doing this for a lot longer than I have. Possibly there was adm and admin, and admin was deprecated because it was confusing to have two groups with very similar names?

EDIT: Humm the feathery one beet me to it

Well I do have the advantage of a pair of robotic trousers

[vinnywright]

Well I do have the advantage of a pair of robotic trousers

+ I cant type fast or spell ,,,,,so am forced to spell check my hole post

VINNY

[vinnywright]

Old releases of *buntu used the "admin" as the group ("adm" group has always served a different purpose), but they changed it to the "sudo" group a while back...the "admin" group was kept in sudoers for backwards compatibility.

yes , yes ,,,,,,that was it

VINNY

[Erwin Smout]

You probably did this:

sudo usermod -G svn erwin

Whereas you wanted to do this:

sudo usermod -a -G svn erwin

The -a appends the group you're adding to the existing list of groups.

Assuming you're using grub, this link should help you boot to a root shell:

http://askubuntu.com/questions/92556...o-a-root-shell

Then as root, you should run something like this:

usermod -a -G erwin,adm,cdrom,sudo,dip,plugdev,lpadmin,sambashare erwin

(based on the groups my user is in).

OK Thnx will try that tomorrow evening (sleep time now).