Linux入门：常用命令：man、which、whereis、whatis、whoami命令帮助

命令帮助

[root@localhost ~]#man ps
#查看一个命令或服务的详细帮助信息

[root@localhost ~]# whatis ls
ls                   (1)  - list directory contents
ls                   (1p)  - list directory contents

[root@localhost ~]# which ls
#
alias ls='ls --color=auto'
/bin/ls

[root@localhost ~]# whereis ls
#查看命令或程序的相关文件安装目录
ls: /bin/ls /usr/share/man/man1p/ls.1p.gz /usr/share/man/man1/ls.1.gz

[root@bogon ~]# whoami
#查看当前用户
root
You have new mail in /var/spool/mail/root