1. 添加用户

adduser userName

• example

  ~~>:~ $ sudo adduser king418
  Adding user `king418' ...
  Adding new group `king418' (1001) ...
  Adding new user `king418' (1001) with group `king418' ...
  
  Creating home directory `/home/king418' ...
  Copying files from `/etc/skel' ...
  New password:
  Retype new password:
  passwd: password updated successfully
  Changing the user information for king418
  Enter the new value, or press ENTER for the default
      Full Name []:
      Room Number []:
      Work Phone []:
      Home Phone []:
      Other []:
  Is the information correct? [Y/n] y
  

2. 切换到某一用户

su - userName

3. 将某一用户 添加到 sudo group

adduser username sudo

• example

  ~~>:~ $ sudo adduser king418 sudo
  Adding user `king418' to group `sudo' ...
  Adding user king418 to group sudo
  Done.
  

4. 如果 使用的 Linux 发行版 没有 adduser 命令，或者想对 user 有 更好的 contorl 可以使用 useradd

（1）添加用户

useradd username