Question

Unable delete user?

Asked by: 1ce

I'm not quite sure what happened, but now every time I try to delete a
user (userdel), it would sit there, hog up CPU/Memory and spam this
line in audit.log

type=USER_CHAUTHTOK msg=audit(1250709320.731:194488024): user
pid=25086 uid=0 auid=502 msg='op=deleting user from group acct=admin
exe="/usr/sbin/userdel" (hostname=?, addr=?, terminal=? res=failed)'
type=USER_CHAUTHTOK msg=audit(1250709320.731:194488025): user
pid=25086 uid=0 auid=502 msg='op=deleting user from group acct=admin
exe="/usr/sbin/userdel" (hostname=?, addr=?, terminal=? res=failed)'
type=USER_CHAUTHTOK msg=audit(1250709320.731:194488026): user
pid=25086 uid=0 auid=502 msg='op=deleting user from group acct=admin
exe="/usr/sbin/userdel" (hostname=?, addr=?, terminal=? res=failed)'
type=USER_CHAUTHTOK msg=audit(1250709320.731:194488027): user
pid=25086 uid=0 auid=502 msg='op=deleting user from group acct=admin
exe="/usr/sbin/userdel" (hostname=?, addr=?, terminal=? res=failed)'
type=USER_CHAUTHTOK msg=audit(1250709320.731:194488028): user
pid=25086 uid=0 auid=502 msg='op=deleting user from group acct=admin
exe="/usr/sbin/userdel" (hostname=?, addr=?, terminal=? res=failed)'
type=USER_CHAUTHTOK msg=audit(1250709320.731:194488029): user
pid=25086 uid=0 auid=502 msg='op=deleting user from group acct=admin
exe="/usr/sbin/userdel" (hostname=?, addr=?, terminal=? res=failed)'


Googling suggested that something went wrong with selinux? Could
anyone point me the right direction.

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Asked On
2009-08-19 at 12:30:55ID24666053
Tags

userdel selinux centos

Topics

Linux Administration

,

Linux Network Security

Participating Experts
2
Points
250
Comments
7

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Answers

 

by: fosiul01Posted on 2009-08-20 at 01:01:59ID: 25140115

try to disable selinux and delete a user

see if  that works fine

then try to enable again ...

 

by: KeremEPosted on 2009-08-20 at 03:06:34ID: 25140703

If it is a selinux problem you'd get extra messages in audit log and syslog (messages) did you check these files for any extra messages?

Cheers,
K.

 

by: KeremEPosted on 2009-08-20 at 03:13:40ID: 25140737

First of ll it does not seem to be your system is SELinux enabled. If it were running SELinux then you would have SELinux info logged with your operation in the log such as:

type=USER_CHAUTHTOK msg=audit(1250763032.627:18542): user pid=32371 uid=0 auid=0 subj=root:system_r:unconfined_t:s0-s0:c0.c1023 msg='op=deleting home directory acct="ddddd" exe="/usr/sbin/userdel" (hostname=?, addr=?, terminal=pts/1 res=
success)'

and it seems that you've auid=502. What is that ??  Will you post your output for these commands

id
finger admin


 

by: 1cePosted on 2009-08-20 at 11:31:09ID: 25145671

Nope, doesn't look like selinux is running, 502 is the group id of another group that admin belong to

[~]# selinuxenabled
[~]# echo $?
1

[~]# id
uid=0(root) gid=0(root) groups=0(root),1(bin),2(daemon),3(sys),4(adm),6(disk),10(wheel)
[~]# finger admin
Login: admin                            Name: (null)
Directory: /home/admin                  Shell: /opt/scripts/startup.sh
Last login Mon Jun  8 14:16 (EDT) on pts/1 from 10.0.2.50
No mail.
No Plan.

 

by: KeremEPosted on 2009-08-20 at 16:23:22ID: 25147970

Hi,

According to your posting the user has a shell /opt/scripts/startup.sh. But it seesm that neither the file exists not it is listed in /etc/shells. Try to change shell to bash: chsh admin and selecting bash.

you might like to remomve the user useing -f -r switches. The first is for force and rthe second is removing the home directory.

Please post the output og /var/lohG/messages too after an unsuccessfull attempt.

Cheers,
K.

 

by: 1cePosted on 2009-08-20 at 16:40:40ID: 25148046

I found my issue, somehow my group file was kinda hose. So essentially i have 2 users A and B

/etc/password

A:x:502:503
B:x:555:555

/etc/group
A:x:502:A,B
A:x:503:A,B
B:x:555:B

Somewhere in my adding removing the user scripts must have duplicate the user groups. So after fixing up the passwd and group file life is good again, Thanks for calling attention to the 502.

 

by: KeremEPosted on 2009-08-20 at 16:43:18ID: 25148065

You'rewelcome nice to see that you have successfully finished the issue.

20120131-EE-VQP-002

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