查看用户登录信息

[root@VM-24-17-centos ~]# whoami 	#查看当前终端的用户身份
root

[root@VM-24-17-centos ~]# su test
[test@VM-24-17-centos root]$ whoami 	#切换用户后再次查询
test

[root@VM-24-17-centos ~]# who	#查看当前有哪些用户登录了系统
root     pts/0        2022-03-28 09:28 (101.204.216.57)

[root@VM-24-17-centos ~]# w	#查看当前登录系统的用户在执行什么操作
 09:35:28 up 26 days, 12:35,  1 user,  load average: 0.00, 0.01, 0.05
USER     TTY      FROM             LOGIN@   IDLE   JCPU   PCPU WHAT
root     pts/0    101.204.216.57   09:28    0.00s  0.01s  0.00s w