Every since I upgraded all my linux-vserver Debian guests from Lenny to Squeeze I've the apparent problem that whenever I want to use sudo it asks me for my password. Every time.
I've configured sudo to have a timeout of 30 minutes: Defaults timestamp_timeout=30 . This has been configured when it was still Lenny (note: as suggested by EightBitTony I've also tried without this setting - no change).
I've a hard time figuring out what the problem here is, since I think my configuration is right.
I thought about it being a problem with the file used to record the timestamp, maybe a permission issue, but was unlucky to find any hard evidence. I've compared the contents of /var/lib/sudo/ between a working and a non-working system but couldn't spot any difference. The version of sudo used in both environments is 1.7.4p4-2.squeeze.3.
My non-working system(s):
find /var/lib/sudo/ -ls
17319289 4 drwx------ 4 root root 4096 Jan 1 1985 /var/lib/sudo/
17319286 4 drwx------ 2 root mark 4096 Jan 1 1985 /var/lib/sudo/mark
17319312 4 -rw------- 1 root mark 40 Jan 1 1985 /var/lib/sudo/mark/6
17319361 4 -rw------- 1 root mark 40 Jan 1 1985 /var/lib/sudo/mark/9
17319490 4 -rw------- 1 root mark 40 Jan 1 1985 /var/lib/sudo/mark/10
17319326 4 -rw------- 1 root mark 40 Jan 1 1985 /var/lib/sudo/mark/4
17319491 4 -rw------- 1 root mark 40 Jan 1 1985 /var/lib/sudo/mark/2
A working system:
find /var/lib/sudo -ls
2598921 4 drwx------ 5 root root 4096 Jan 1 1985 /var/lib/sudo
1999522 4 drwx------ 2 root mark 4096 Jan 1 1985 /var/lib/sudo/mark
2000781 4 -rw------- 1 root mark 40 Jan 1 1985 /var/lib/sudo/mark/8
1998998 4 -rw------- 1 root mark 40 Jan 1 1985 /var/lib/sudo/mark/17
1999459 4 -rw------- 1 root mark 40 Jan 1 1985 /var/lib/sudo/mark/26
1998930 4 -rw------- 1 root mark 40 Jan 1 1985 /var/lib/sudo/mark/24
2000771 4 -rw------- 1 root mark 40 Jun 25 11:39 /var/lib/sudo/mark/4
2000773 4 -rw------- 1 root mark 40 Jan 1 1985 /var/lib/sudo/mark/5
1999223 4 -rw------- 1 root mark 40 Jan 1 1985 /var/lib/sudo/mark/0
1998908 4 -rw------- 1 root mark 40 Jan 1 1985 /var/lib/sudo/mark/14
2000769 4 -rw------- 1 root mark 40 Jul 9 13:30 /var/lib/sudo/mark/2
2000770 4 -rw------- 1 root mark 40 Jan 1 1985 /var/lib/sudo/mark/3
2000782 4 -rw------- 1 root mark 40 Jan 1 1985 /var/lib/sudo/mark/9
2000778 4 -rw------- 1 root mark 40 Jul 8 00:11 /var/lib/sudo/mark/7
1998892 4 -rw------- 1 root mark 40 Jan 1 1985 /var/lib/sudo/mark/19
1999264 4 -rw------- 1 root mark 40 Jan 1 1985 /var/lib/sudo/mark/23
2000789 4 -rw------- 1 root mark 40 Jan 1 1985 /var/lib/sudo/mark/12
1999093 4 -rw------- 1 root mark 40 Jan 1 1985 /var/lib/sudo/mark/25
1998880 4 -rw------- 1 root mark 40 Jan 1 1985 /var/lib/sudo/mark/18
1998853 4 -rw------- 1 root mark 40 Jan 1 1985 /var/lib/sudo/mark/20
2000790 4 -rw------- 1 root mark 40 Jan 1 1985 /var/lib/sudo/mark/15
1998878 4 -rw------- 1 root mark 40 Jan 1 1985 /var/lib/sudo/mark/16
1998874 4 -rw------- 1 root mark 40 Jan 1 1985 /var/lib/sudo/mark/13
2000774 4 -rw------- 1 root mark 40 Jan 1 1985 /var/lib/sudo/mark/6
2000786 4 -rw------- 1 root mark 40 Jan 1 1985 /var/lib/sudo/mark/11
1998893 4 -rw------- 1 root mark 40 Jan 1 1985 /var/lib/sudo/mark/22
2000783 4 -rw------- 1 root mark 40 Jan 1 1985 /var/lib/sudo/mark/10
1998949 4 -rw------- 1 root mark 40 Jan 1 1985 /var/lib/sudo/mark/1
Despite the obvious (some up2date timestamps on the working system) I don't see anything wrong here, so it could be as well be a wrong track.
Here's my current /etc/sudoers:
# /etc/sudoers
#
# This file MUST be edited with the 'visudo' command as root.
#
# See the man page for details on how to write a sudoers file.
#
Defaults env_reset
# Host alias specification
# User alias specification
User_Alias FULLADMIN = user1, user2, user3
# Cmnd alias specification
# User privilege specification
root ALL=(ALL) ALL
FULLADMIN ALL = (ALL) ALL
# Allow members of group sudo to execute any command
# (Note that later entries override this, so you might need to move
# it further down)
%sudo ALL=(ALL) ALL
#
#includedir /etc/sudoers.d
#Defaults always_set_home,timestamp_timeout=30
