登录信息查看whoami、who、w

用户登录信息查看命令：

whoami: 显示当前登录有效用户
who: 系统当前所有的登录会话
w: 系统当前所有的登录会话及所做的操作

[root@localhost ~]# who am i
root     pts/0        2024-01-09 15:23 (192.168.198.1)
[root@localhost ~]# who
root     pts/0        2024-01-09 15:23 (192.168.198.1)
[root@localhost ~]# w
 06:11:44 up  2:22,  1 user,  load average: 0.11, 0.04, 0.05
USER     TTY      FROM             LOGIN@   IDLE   JCPU   PCPU WHAT
root     pts/0    192.168.198.1    15:23     ?     0.17s  0.01s w
[root@localhost ~]#