使用其他用户登录时启用超级用户

Question

假设机器有两个用户：

• 爱丽丝（管理员）
• 鲍勃（标准用户）

当Bob登录时，Alice如何修改根文件（即使Bob没有此权限sudo）？

爱丽丝尝试过：

$ sudo vim /etc/hosts
[sudo] password for Bob: 
Bob is not in the sudoers file.  This incident will be reported.

Answer 1

使用su：

su - alice
sudo vim /etc/hosts

从man su：

   The su command is used to become another user during a login session.
   Invoked without a username, su defaults to becoming the superuser. The
   optional argument - may be used to provide an environment similar to
   what the user would expect had the user logged in directly.

有关更多信息，请参阅

man su

和维基百科。