su – root 和 su root 的区别

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su – root:表示人以root身份登录
just like login as root, then the shell is login shell,
which mean it will expericene a login process,
usually .bash_profile and .bashrc will be sourced
su root:表示与root建立一个链接,通过root执行命令
like you open an interactive shell in root name,
then only .bashrc will be sourced. (责任编辑:IT)