ubuntu 查看当前系统登录用户名单

“who”命令查询当前登录的用户

>>>??who
chenxinming?pts/4????????2018-08-02?03:30?(192.168.3.221)
chenxinming?pts/6????????2018-08-06?11:19?(192.168.3.221)
chenxinming?pts/7????????2018-08-07?03:27?(192.168.3.221)
chenxinming?pts/8????????2018-08-08?05:27?(192.168.3.240)
chenxinming?pts/9????????2018-08-08?16:09?(192.168.3.240)
chenxinming?pts/10???????2018-08-10?08:28?(192.168.3.221)

“ps -u 用户名”命令查看该用户的pid

>>>?ps?-u?chenxinming
??PID?TTY??????????TIME?CMD
?2456??????????00:00:00?sshd
?2487?pts/7????00:00:00?bash
?6643?pts/8????00:00:33?python
?8800??????????00:00:00?sshd
?8801?pts/10???00:00:00?bash
14014??????????00:00:01?sshd
14015?pts/6????00:00:00?bash
21035?pts/7????00:00:00?bash
25352??????????00:02:42?sshd
25353?pts/4????00:00:00?bash
30648??????????00:00:24?sshd
30649?pts/8????00:00:00?bash
31199??????????00:00:00?sshd
31200?pts/9????00:00:00?bash

“kill pid”命令，杀掉他的sshd或者是shell进程

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