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
chenxinmingpts/42018-08-0203:30(192.168.3.221)
chenxinmingpts/62018-08-0611:19(192.168.3.221)
chenxinmingpts/72018-08-0703:27(192.168.3.221)
chenxinmingpts/82018-08-0805:27(192.168.3.240)
chenxinmingpts/92018-08-0816:09(192.168.3.240)
chenxinmingpts/102018-08-1008:28(192.168.3.221)

“ps -u 用户名”命令查看该用户的pid

>>>ps-uchenxinming
PIDTTYTIMECMD
2456?00:00:00sshd
2487pts/700:00:00bash
6643pts/800:00:33python
8800?00:00:00sshd
8801pts/1000:00:00bash
14014?00:00:01sshd
14015pts/600:00:00bash
21035pts/700:00:00bash
25352?00:02:42sshd
25353pts/400:00:00bash
30648?00:00:24sshd
30649pts/800:00:00bash
31199?00:00:00sshd
31200pts/900:00:00bash

“kill pid”命令，杀掉他的sshd或者是shell进程

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