I am encountering an odd problem with su. Up until quite recently I was
able to connect to one of my servers (CentOS-5.2) via ssh as an ordinary
user and then, from the shell, perform an $ su -l to obtain root access.
Now when I try to do this I see the following:
$ su -l
Password:
su: incorrect password
If, instead of I ssh to this machine as the root user ($ ssh -l root host)
and enter exactly the same password from the same keyboard then I log in
successfully as root. I have made no conscious changes to the target
system configuration files and I know that the first method, logging in as
a normal user and then su -l to root, was working just a few days ago.
Review of the man and info pages does not enlighten me as to what might be
wrong. The log file says this:
Jan 14 12:00:22 inet01 sshd[15433]: Accepted password for myuser from
x.x.x.x port 53458 ssh2
Jan 14 12:00:22 inet01 sshd[15433]: pam_unix(sshd:session): session opened
for user myuser by (uid=0)
Jan 14 12:00:32 inet01 su: pam_unix(su-l:auth): authentication failure;
logname=myuser uid=500 euid=500 tty=pts/8 ruser=myuser rhost= user=root
Any ideas as to what might be happening here and how I might fix it?
Regards,
--
*** E-Mail is NOT a SECURE channel ***
James B. Byrne mailto:ByrneJB@xxxxxxxxxxxxx
Harte & Lyne Limited http://www.harte-lyne.ca
9 Brockley Drive vox: +1 905 561 1241
Hamilton, Ontario fax: +1 905 561 0757
Canada L8E 3C3
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