normal user sudo config

• sudo su
  • enter to root
• nano /etc/sudoers
  • add below "root ALL=(ALL:ALL) ALL" 
    • louiey All=(ALL:ALL) ALL
  • save
• nano /etc/passwd
  • modify like as below
    • louiey:x:0:0:iu,,,:/home/iu:/bin/bash
  • save
• nano /etc/group
  • modify like as below..first line
    • root:x:0:louiey
    • louiey:x:0:
  • save
• done