su - root:
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
like you open an
interactive shell in root name,
then only .bashrc will be sourced.
su 和 sudo 的区别:
1.共同点:都是root用户的权限;
2.不同点:su仅仅取得root权限,工作环境不变,还是在切换之前用户的工作环境;sudo是完全取得root的权限和root的工作环境。
su - root 和 su root(su)有什么区别?
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.
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最直接的区别就是su目录还是原先用户的目录
但是su或su - root后目录就变为root用户的主目录了。