Linux using notes 1

Zox's code life is a constant battle! XXX is not in the sudoers file. This incident would be reported. Solution

1. Switch to the root user, how to switch it needless to say, will not be Baidu to go.

Command: su

2. Add the Write permission to the sudo file, and the command is:
chmod u+w/etc/sudoers

3. Edit the Sudoers file
Vi/etc/sudoers
Find this line root all= (all) all, add the following to him xxx all= (all) all (here xxx is your user name)
I enter edit mode
PS: Here you can sudoers add any one of the following four lines
Youuser all= (All) all
%youuser all= (All) all
Youuser all= (All) Nopasswd:all
%youuser all= (All) Nopasswd:all

First line: Allows the user to execute the sudo command youuser (requires a password).
Second line: Allow user group Youuser inside user to execute sudo command (need to enter password).
Line three: Allow the user to execute the sudo command youuser, and do not enter a password at the time of execution.
Line four: Allow user group Youuser inside user to execute sudo command, and do not enter password at execution time.

4. Revoke sudoers file Write permission, command:
chmod u-w/etc/sudoers

This makes it possible for ordinary users to use sudo.

Linux using notes 1