useradd來創建一個普通的使用者帳號
# useradd USERNAME
# passwd USERNAME  
Changing password for user USERNAME.  
New password:  
Retype new password:  
passwd: all authentication tokens updated successfully.
visudo去編輯/etc/sudoers檔案
# visudo
## Allows people in group wheel to run all commands  
# %wheel ALL=(ALL) ALL
# usermod -aG wheel USERNAME