id #查看用户
语法：
id + 用户名
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who #查看用户
```````````````````````````````````````````````````````````````````````````````````````````````````````` `` whoami #查看用户
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w #查看用户
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uptime #查看用户
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finger #查看用户
语法：
finger + 用户
安装命令：yum install -y finger
