Linux gives ordinary users root privileges

Test environment: CentOS 6.51, add users, first add a normal user with the AddUser command, the command is as follows: #adduser Tommy//Add a user named Tommy #passwd Tommy   // Modify the password changing password for user Tommy. New UNIX Password:     //Enter this password here Retype Unix password:  //Enter new password again passwd:all authentication tokens updated Successfully. 2, give root permission method One: Modify the/etc/sudoers file, find the following line, the previous comment (#) removed # # allows people in group wheel to run all Commands%wheel
   all= (All)    Su- , you can get root permission to operate. Method Two: Modify the/etc/sudoers file, locate the following line, and add a line below root as follows: # allow ROOT to run any commands anywhereroot    all= (All)     Alltommy   all= (All)     Su- , you can get root permission to operate.

But it looks like the red and thicker Su-- I usually use sudo. I don't know if the author is a typo or something, because with Su, I need to know the root password, so sudo will be better.

Linux gives ordinary users root privileges