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How TO Kill and Logout users in pts/* Linux

  • 2013/01/21
  • 系统相关
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  • How TO Kill and Logout users in pts/* Linux已关闭评论

Sometimes you may need to force logout and kill a specific user, or an active user in pts/0 pts/1 pts/3 etc.

First of all display the out put of  “w” command.

[oracle@ggsdb ~]$ w
11:12:55 up 95 days, 20:13,  3 users,  load average: 3.13, 3.36, 4.46
USER     TTY      FROM              LOGIN@   IDLE   JCPU   PCPU WHAT
root     pts/1    192.168.212.217  10:49   22:01   3.44s  3.44s top
oracle   pts/5    192.168.212.221  10:55    1.00s  0.02s  0.00s w
root     pts/4    192.168.212.217  10:50   15:35   0.01s  0.01s -bash

Here the user “root”  is logged in from two  terminal ip 192.168.212.217. and statue was IDLE. And you need to force logout and kill the user “root” logged in from ip: 192.168.212.221 (pts/5)

use the below command

[root@ggsdb ~]# skill -KILL -v pts/4
pts/4    root     29267 bash
[root@ggsdb ~]# w
11:19:46 up 95 days, 20:20,  2 users,  load average: 2.45, 3.89, 4.42
USER     TTY      FROM              LOGIN@   IDLE   JCPU   PCPU WHAT
root     pts/1    192.168.212.217  10:49   20.00s  0.00s  0.00s -bash
oracle   pts/5    192.168.212.221  10:55    0.00s  0.04s  0.00s sshd: oracle [priv]

This command will force logout and kill the user in pts/4. and the same user logged in pts/1 will not be logged out.

If need to kill a users all the connected sessions at once
[root~#]skill -KILL -u  root          (this will kill both pts/4 and pts/5 sessions)

To STOP/PAUSE a user’s activities
[root~#]skill -STOP -u <username>

To RESUME a stopped user
[root~#]skill -CONT -u <username>

The ultimate command to kill and logout all users is as follows:
# skill -KILL -v /dev/pts/*

WARNING! These tools are obsolete, unportable and it is here due to historical reasons. Consider using the killall, pkill, and pgrep commands instead as follows.

pkill command

To halt or stop a user called bob, enter:
# pkill -STOP -u bob
To resume a user called bob, enter:
# pkill -CONT -u bob

[root@ggsdb ~]# w
11:37:43 up 95 days, 20:38,  3 users,  load average: 0.07, 0.27, 1.48
USER     TTY      FROM              LOGIN@   IDLE   JCPU   PCPU WHAT
root     pts/2    192.168.212.217  11:20   17:07   0.00s  0.00s -bash
root     pts/1    192.168.212.217  11:20   17:10   0.00s  0.00s -bash
oracle   pts/5    192.168.212.221  10:55    0.00s  0.05s  0.00s sshd: oracle [priv]
[root@ggsdb ~]# pkill -kill -t pts/1
[root@ggsdb ~]# w
11:38:21 up 95 days, 20:38,  2 users,  load average: 0.03, 0.24, 1.41
USER     TTY      FROM              LOGIN@   IDLE   JCPU   PCPU WHAT
root     pts/2    192.168.212.217  11:20   17:45   0.00s  0.00s -bash
oracle   pts/5    192.168.212.221  10:55    0.00s  0.05s  0.00s sshd: oracle [priv]

         In Linux, PTS stands for Pseudo Terminal Slave. PTS refers to a user currently logged in to your terminal using an SSH or telnet connection. Killing a PTS will send a kill command to that user’s connection, closing it. Both active and idle users can be logged out using this command. Killing a user’s connection will not prevent him from logging in again in the future.

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