Linux查看當前登入使用者並踢出使用者__Linux

1、查看當前登入使用者

[wilsh@lcl ~]$ whatis ww                    (1)  - Show who is logged on and what they are doing[wilsh@lcl ~]$ w 09:49:30 up 1 day, 17:19,  4 users,  load average: 0.00, 0.00, 0.00USER     TTY      FROM              LOGIN@   IDLE   JCPU   PCPU WHATroot     tty3     -                09:25   23:25   0.10s  0.08s -bashroot     pts/0    192.168.105.188  09:32    9:38   0.02s  0.02s -bashroot     pts/1    192.168.105.188  09:36    9:32   0.03s  0.02s -bashwilsh    pts/2    192.168.105.188  09:41    0.00s  0.00s  0.00s w

2、踢出當前線上的使用者

a)pkill

[wilsh@lcl ~]$ whatis pkillpkill [pgrep]        (1)  - look up or signal processes based on name and other attributes

[wilsh@lcl ~]$ pkill -KILL -u wilsh #-u用來指定使用者名稱

[wilsh@lcl ~]$ pkill -9 -u wilsh # -KILL -9都是可以的。

[wilsh@lcl ~]$ pkill -KILL -t pts/2[wilsh@lcl ~]$ pkill -KILL -t /dev/pts/2 # 這種寫法是錯誤的。因為在man page中明確說明，如果要使用-t參數，那麼就不能帶/dev/前輟。<span style="color:#FF99FF;"><span style="background-color: rgb(255, 255, 153);">#在centos6.7 kernel 3.10.28中測試，發現寫完整的裝置名稱並不起作用（如/dev/pts/2）,本文是在kernel 2.6.32中寫的，昨天晚上剛剛重啟編譯完3.10.28的核心，測試了一下又不可以了，鬱悶。</span></span>

b)skill

[wilsh@lcl ~]$ whatis skillskill                (1)  - send a signal or report process status

[wilsh@lcl ~]$ skill -9 -t pts/2

[wilsh@lcl ~]$ w 09:57:37 up 1 day, 17:28,  4 users,  load average: 0.00, 0.00, 0.00USER     TTY      FROM              LOGIN@   IDLE   JCPU   PCPU WHATroot     tty3     -                09:25   31:32   0.10s  0.08s -bashroot     pts/0    192.168.105.188  09:32   17:45   0.02s  0.02s -bashroot     pts/1    192.168.105.188  09:36   17:39   0.01s  0.01s -bashwilsh    pts/2    192.168.105.188  09:57    0.00s  0.00s  0.00s w[wilsh@lcl ~]$ skill -9 -u wilsh