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Posted on: 15 Apr 2008
Author: mandrei
Section: Server Operating Systems | Problems and Solutions
Views: 1197
Comments: 1 (Add)

SU Error - su: not running setuid - FreeBSD - Linux
su: not running setuid, cannot su, su error, su problem

 



SU Error - su: not running setuid

If this error occures while you try to su, it means that you need to set SUID bit to su binary like below:

$ su -
su: not running setuid

(BECOME ROOT SOMEHOW AND THEN...)

# ls -l `which su`
-r-xr-x---  1 root  wheel  14324 Apr 12 23:14 /usr/bin/su
# chmod u+s `which su`
# ls -l `which su`
-r-sr-x---  1 root  wheel  - 14324 Apr 12 23:14 /usr/bin/su
# su - andrei
$ su -
Password:

 So above commands do:

1. ls -l `which su` - lists su binary 

2. chmod u+s `which su` - adds SUID bit to su binary

3 exactly like 1.

4. su to another user ( andrei in this case)

4. su to root from a normal user. See that the error does not occure any more.

notes: instead of `which su` you could use directly /path/to/su/binary if you know it, and you can use `which su` and it'll work on both Linux & FreeBSD.

This error occured  after a buildworld. I  suspect that because of  file flags I use.

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1 comment(s) to SU Error - su: not running setuid - FreeBSD - Linux:

1. Re: SU Error - su: not running setuid - FreeBSD - Linux
Thank you very much by Matthew at February 23rd, 2009 - 23:47
Thank you very much, this was very helpful

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