I'm trying to understand if anyone is left on a server. Basically I manage a simple linux server remotely used by 3-4 individuals. I can never tell if someone is actually on or not using w/who.
What I'm seeing is some people having what appears to be inactive/lost VNC sessions. I don't understand idle fully, but I do believe a program (without user interaction) can clear idle back to 0, correct?
Anyway, I'm asking because every now and then I need to reboot the server, and I do not want to interrupt any program working on calculations or waiting on having the data saved.
Here's what I see in w:
06:59:54 up 170 days, 9:13, 16 users, load average: 0.52, 0.16, 0.06
USER TTY LOGIN@ IDLE JCPU PCPU WHAT
me :2/matri 06:59 ?xdm? 7days 0.10s /bin/sh /usr/X11R6/bin/kde
user1 pts/0 21Dec10 15days 0.00s 1.44s kded [kdeinit]
user3 pts/1 29Oct10 10:42m 0.31s 0.20s ssh -Y firstname.lastname@example.org
user2 pts/2 27Nov10 39days 0.00s 24.94s kded [kdeinit]
user3 pts/4 20Jul10 169days 0.00s 1:36 kded [kdeinit]
user1 :0 21Dec10 ?xdm? 7days 0.09s /bin/sh /usr/X11R6/bin/kde
user2 matrix.w 27Nov10 0.00s 0.00s 0.06s /bin/sh /usr/X11R6/bin/kde
me pts/5 06:59 0.00s 0.08s 0.01s w
me matrix.w 06:59 0.00s 0.00s 0.10s /bin/sh /usr/X11R6/bin/kde
user3 pts/12 14Dec10 10:30m 0.10s 0.01s ssh ccc.aaa.ca -l rpd2
me pts/3 06:59 46.00s 0.00s 1.36s kded [kdeinit]
Where can I go from here? How can I tell what users I can log off? How can I tell that there has been no user interaction for a week for example?