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Linux学习笔记第三周第三次课(2月7日）-12049818-51CTO博客
source link: http://blog.51cto.com/12059818/2071805
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3.7 su命令root用户切换到普通用户命令，su；完全彻底切换 - ，连环境变量，家目录也切换，命令为#su - aming；查看当前登陆用户，命令为#whoami；查看当前目录，命令为#pwd；查看用户UID，GID，组，家目录，用户shell目录，命令为#id；切换用户，环境变量和家目录没切换，命令为#su aming；退出切换的用户，命令为#exit；当前用户下，不切换到aming用户，
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