Add a User and Grant Root Privileges on Linux

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Step 1: Add the User

It’s just one simple command to add a user. In this case, we’re adding a user called admin:

# adduser admin

Now set the password for the new user:

# passwd admin

Step 2: Grant Root Privileges to the User

# visudo

Find the following code:

## Allow root to run any commands anywhere
root ALL=(ALL) ALL
In this case, we’re granting root privileges to the user mynewuser . Add the following below that code:
admin ALL=(ALL) ALL

Then exit and save the file with the command  :wq!  .
# su admin
# sudo yum update

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