pkill命令用法之 - 从终端踢掉其他登录者

想从终端快速踢掉系统中其他登录者，可以先用w命令查看当前所有登录信息，并确定自己所在终端号。

[[email protected] ~]# w

10:14:52 up  6:01,  3 users,  load average: 0.00, 0.01, 0.05

USER     TTY      FROM             [email protected]   IDLE   JCPU   PCPU WHAT

root     tty1                      10:10   36.00s  0.23s  0.23s -bash

gentoo   pts/0    10.1.1.110       10:14   12.00s  0.07s  0.07s -bash

root     pts/1    192.168.10.198   09:46    4.00s  0.19s  0.01s w

[[email protected] ~]#

命令显示中有“w”的行所指明的TTY值就是你当前登录的终端号（pts/1），接下来用pkill命令按需求踢掉其他的登陆者即可，假如现在你想踢掉当前登录用户gentoo，从上面的w命令看gentoo用户所在的终端号为（pts/0），使用如下pkill命令：

[[email protected] ~]# pkill -9 -t pts/0

再用w命令查看

[[email protected] ~]# w

10:23:53 up  6:10,  2 users,  load average: 0.00, 0.01, 0.05

USER     TTY      FROM             [email protected]   IDLE   JCPU   PCPU WHAT

root     tty1                      10:10    9:37   0.23s  0.23s -bash

root     pts/1    192.168.10.198   09:46    1.00s  0.24s  0.01s w

[[email protected] ~]#

登录用户gentoo就已经被踢下去了。

命令格式：

pkill -signal -t SIGNAL

-signal

--signal signal

Defines the signal to send to each matched process.  Either the numeric or the symbolic

signal name can be used.  (pkill only.)

-t, --terminal term,...

Only match processes whose controlling terminal is listed.  The terminal name should be

specified without the "/dev/" prefix.

SIGNAL

Signal     Value     Action   Comment

────────────────────────────────────

SIGHUP        1       Term    Hangup detected on controlling terminal

or death of controlling process

SIGINT        2       Term    Interrupt from keyboard

SIGQUIT       3       Core    Quit from keyboard

SIGILL        4       Core    Illegal Instruction

SIGABRT       6       Core    Abort signal from abort(3)

SIGFPE        8       Core    Floating point exception

SIGKILL       9       Term    Kill signal

SIGSEGV      11       Core    Invalid memory reference

SIGPIPE      13       Term    Broken pipe: write to pipe with no readers

SIGALRM      14       Term    Timer signal from alarm(2)

SIGTERM      15       Term    Termination signal

SIGUSR1   30,10,16    Term    User-defined signal 1

SIGUSR2   31,12,17    Term    User-defined signal 2

SIGCHLD   20,17,18    Ign     Child stopped or terminated

SIGCONT   19,18,25    Cont    Continue if stopped

SIGSTOP   17,19,23    Stop    Stop process

SIGTSTP   18,20,24    Stop    Stop typed at terminal

SIGTTIN   21,21,26    Stop    Terminal input for background process

SIGTTOU   22,22,27    Stop    Terminal output for background process