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The method of adding users and giving root permissions in linux system

Shulou Source: shulou.com Published: 2022-06-03 05:29:11 09月30日 Update

1. To add a user, first add a normal user with the adduser command as follows:

# adduser eric

/ / add a user named eric

# passwd eric// change password

Changing password for user eric.

New UNIX password: / / enter the new password here

Retype new UNIX password: / / enter the new password again

Passwd: all authentication tokens updated successfully.

2. Give root permission

Method 1: modify the / etc/sudoers file, find the following line, and remove the previous comment (#)

Allows people in group wheel to run all commands

% wheel ALL= (ALL) ALL

Then modify the user to belong to the root group (wheel), with the following command:

# usermod-g root eric

After the modification, you can now log in with your eric account, and then use the command su-to get root permission to operate.

Method 2: modify the / etc/sudoers file, find the following line, and add a line under root, as follows:

Allow root to run any commands anywhere

Root ALL= (ALL) ALL

Eric ALL= (ALL) ALL

After the modification, you can now log in with your eric account, and then use the command sudo-to get root permission to operate.

Method 3: it is highly recommended to use this method, modify the / etc/passwd file, find the following line, and modify the user ID to 0

As follows:

Eric:x:0:33:eric:/data/webroot:/bin/bash