The XXX is not in the sudoers file resolves

Reason

The problem that comes up in Linux is that I'm on the Centos7. XXX is the current username because the user was not added to the sudo configuration file

Solve

Add the current user to the sudo configuration file. ‘

Steps:

1. Switch to root: Su-(note there-, set the environment variable for the current environment variable to the root user, that is, the same as the root login.) If Su is just the user switching to root)

2. Edit sudo config file: Visudo or: Vi/etc/sudoers

3. After entering the vi editing mode, in the following file location, add a line for XXX

Root    all= (All)       all     
xxx  all=       

4. Then: Wq. can be used.

Note: su xxx switches to xxx user. Su or Su-is switched to root user

The above is to configure sudo permissions for users all