redhat下查看系统当前登录的用户、更改用户密码、强制踢出用户

1、查看当前登录的用户

[root@mgt ~]# w
 18:08:27 up 40 days,  8:16,  5 users,  load average: 0.01, 0.21, 0.36
USER     TTY      FROM              LOGIN@   IDLE   JCPU   PCPU WHAT
geohpc   pts/0    192.168.13.7   16:23   51:13   0.08s  0.08s -bash
geohpc   pts/1    192.168.13.1   14:50   51:28   0.23s  0.02s sshd: geohpc [priv]
root     pts/2    192.168.13.7   18:06    0.00s  0.03s  0.01s w
geohpc   pts/5    192.168.13.7   17:31   23:41   0.04s  0.04s -bash
geohpc   pts/7    192.168.13.17   17:44   15:14   0.03s  0.03s -bash

2、强制踢出用户

[root@mgt ~]# pkill -kill -t pts/0
[root@mgt ~]# pkill -kill -t pts/1
[root@mgt ~]# pkill -kill -t pts/5
[root@mgt ~]# pkill -kill -t pts/7

3、查看是否踢出成功（看，只剩下了我：root）

[root@mgt ~]# w
 18:08:45 up 40 days,  8:16,  1 user,  load average: 0.07, 0.22, 0.36
USER     TTY      FROM              LOGIN@   IDLE   JCPU   PCPU WHAT
root     pts/2    192.168.13.7   18:06    0.00s  0.02s  0.00s w

4、更改用户密码

[root@mgt ~]# passwd geohpc
Changing password for user geohpc.
New password: 
Retype new password: 
passwd: all authentication tokens updated successfully.