I want to change sudo timeout, so I edit sudoers via visudo (as adviced in many tutorials online) to the following form:
Defaults env_reset , timestamp_timeout=20 root ALL=(ALL:ALL) ALL %admin ALL=(ALL) ALL %sudo ALL=(ALL:ALL) ALL Defaults:my_username timestamp_timeout=10
the problem is, that nothing works and it seems I have sudo timeout=0. This is my output from
Linux comp 3.0.0-12-generic #20-Ubuntu SMP Fri Oct 7 14:56:25 UTC 2011 x86_64 x86_64 x86_64 GNU/Linux
What I've noticed it's only happens when I use fish (aka user friendly shell). So problem probably with fish itself not with sudoers file.
SOLUTION The problem was with my shell fish aka user friendly (not very friendly this time, isn't it?) shell. For some reason it seemed that sudo command each time went from different sessions. Adding Defaults !tty_tickets in sudoers file (as described http://us.generation-nt.com/answer/bug-598567-sudo-requires-reauthentication-each-use-ignoring-time-stamp-help-200510161.html ) solved the problem. See the link above for the addition information.
Thank you all for your attention without it I could not figure the thing out.