1. sodusgroup group to linux system
2. add user and move it to sodusgroup group
3. open 'teminal' and run 'visudo' command
4. find 'root ALL...'
5. Hit 'i' to insert a line after 'root' line
6. as "%sudosgroup ALL=(ALL) ALL"
7. 'ESC' and ':x' to save and exit visudo command
8. logout an root user and login as the new use
9. new command 'sudo yum update' to check user set up corrrectly
