linux命令之whoami

1.whoami

例子:

[root@cs70-moban ~]# whoami root

作用文档：

Usage: whoami [OPTION]... Print the user name associated with the current effective user ID. Same as id -un.

红线：whoami的作用是打印当前有效用户id

蓝框：whoami=id -un

[root@cs70-moban ~]# id -un root

2.whoami 、who 、 who am i三者区别

who am i：

Usage: who [OPTION]... [ FILE | ARG1 ARG2 ] Print information about users who are currently logged in.

打印当前登录用户名

who ：

Usage: who [OPTION]... [ FILE | ARG1 ARG2 ] Print information about users who are currently logged in.

这个命令重点是用来查看当前有哪些用户登录到了本台机器上