Can't use "su"

[Cheung_2]

In our system, part of Login ID can't run ???su??? to login as other user

eg.
# su - tommy
Password:
su: incorrect password

After I use ???su??? and userid , it will pop up ???incorrect password??? , someone can suggest how to fix it? Thx.

[U.SivaKumar_2 · Accepted solution]

Hi,

Login as root.

#chmod +s /bin/su

hope your problem is solved

regards,
U.SivaKumar

[Cheung_2]

Hi U.SivaKumar,

I tried your method , it is not success . Thx.

[Rajeev Shukla]

Can you let us know two things.
1. Is your systems trusted?
2. do "which su" and let me know what it returns and the permission of this file which is returned by above command.

Rajeev

[Cheung_2]

cus//test> which su
/bin/su
cus//test> ll /bin/su
-rwsr-sr-x 1 root root 18452 Jul 24 2001 /bin/su

[Rajeev Shukla]

sorry for one more thing ..
what version of HP-UX is it.

Thanks
Rajeev

[Cheung_2]

HP UX 11.0

[T G Manikandan]

Some of the su problems are fixed in this patch.

PHCO_16127
http://www1.itrc.hp.com/service/patch/patchDetail.do?patchid=PHCO_16127&context=hpux:800:11:00

check it out and revert

[Rajeev Shukla]

I am surprised at a few things.
1. The file size for 11.00 is different from what you have specified.
2. Ownership of the files are wrong.
Can you do few things.
/bin/sh is a hard link or a copy of /usr/bin/sh. Can you make sure that /usr/bin/sh and /bin/sh have same ownership and permission.
Alternatevely as you said for some logins its working, which might be because some users have /usr/bin/sh as their default shell where as others might be having /bin/sh


Rajeev

[Fragon]

This is my data in L2000 with HP-UX11.00:
#ll /usr/bin/su
-r-sr-xr-x 1 root bin 24576 Aug 7 1998 su
#ll /bin/su
-r-sr-xr-x 1 root bin 24576 Aug 7 1998 su

[John Collier]

I have the exact same info for those two files that Gerald has. Not that this will help you much, but it is offered to verify that his readings are consistant with other systems.

[Jose Mosquera]

Usually, the error message is other, but...

Are you using /etc/default/security implementation? pls review SU_ROOT_GROUP definition.

Rgds