"Empty" sessions

lodziarz · 09-07-2007, 12:14 PM

Hello! I have a little problem.

Some time ago, when I was working via SSH on my server, connection was reseted, but session was still hanging on process list. I used kill -9, but it doesn't help enough, 'cause when I'm typing "who" I see them:

Code:

user@machine:~> who
user     pts/1        2007-09-07 18:57 (xxx.xxx.xxx.xxx)
root     pts/7        2007-09-07 15:00 (xxx.xxx.xxx.xxx)
root     pts/8        2007-09-07 15:07 (xxx.xxx.xxx.xxx)
user     pts/9        2007-09-07 16:39 (xxx.xxx.xxx.xxx)
user     pts/11       2007-07-22 18:53 (xxx.xxx.xxx.xxx)

How to "kill" them from that list?

{BBI}Nexus{BBI} · 09-08-2007, 09:36 AM

Quote:

Originally Posted by lodziarz

Hello! I have a little problem.

Some time ago, when I was working via SSH on my server, connection was reseted, but session was still hanging on process list. I used kill -9, but it doesn't help enough, 'cause when I'm typing "who" I see them:

Code:

user@machine:~> who
user     pts/1        2007-09-07 18:57 (xxx.xxx.xxx.xxx)
root     pts/7        2007-09-07 15:00 (xxx.xxx.xxx.xxx)
root     pts/8        2007-09-07 15:07 (xxx.xxx.xxx.xxx)
user     pts/9        2007-09-07 16:39 (xxx.xxx.xxx.xxx)
user     pts/11       2007-07-22 18:53 (xxx.xxx.xxx.xxx)

How to "kill" them from that list?

To kill and logout a user you could try: skill -KILL -u (username here) or to kill and logout all users try: skill -KILL -v /dev/pts/*

lodziarz · 09-10-2007, 11:59 AM

Quote:

Originally Posted by {BBI}Nexus{BBI}

To kill and logout a user you could try: skill -KILL -u (username here) or to kill and logout all users try: skill -KILL -v /dev/pts/*

Thx for your reply {BBI}Nexus{BBI}

Code:

$ skill -KILL -u user
$ who
root     pts/1        Sep 10 18:50 (xxx.xxx.xxx.xxx)
root     pts/8        Sep  7 15:07 (xxx.xxx.xxx.xxx)
user pts/9        Sep  7 16:39 (xxx.xxx.xxx.xxx)
user pts/11       Jul 22 18:53 (xxx.xxx.xxx.xxx)
root     :1/host Sep  3 22:26 (host)
$ ls /dev/pts/
.  ..  1  2

Doesn't work. This user isn't logged in from long time, just connection resetted during SSH session and user disconnected from the server, but this session from x days are still hanging in "who"

Btw. It's SuSe 9.3 if it matters.

{BBI}Nexus{BBI} · 09-10-2007, 04:17 PM

Try using top to kill the hanging processes. Simply type top in a console (Note: you need to run top as root to kill root processes).

Some useful commands:

u then type username and press enter <-- Only shows info about username specified.

c <-- Shows detailed info about users running processes.

k then type pid number then press enter twice <-- Sends a kill signal with a default value of 15 (If this fails to kill the process, repeat except do not press enter twice, when asked for a value use 9 then press enter).

u then press enter <-- This with no other parameters will show all users and their processes.

q <-- Quits top.

You should also check your settings in your /etc/ssh/ssh_config file for a command which may be keeping your connections alive. Type: man ssh and man ssh_config for further info.

lodziarz · 09-11-2007, 12:29 AM

The problem is that they aren't hanging in processes list. They stand ONLY in "who" command, nowhere else. I'm thinking how to kill them from there. I've restarted sshd deamon, but didn't help. Is there any way to kill them?