Add users under CentOS and let users get root permissions

Http://www.centoscn.com/CentOS/config/2014/0810/3471.html

1, add users, first with the AddUser command to add an ordinary user, the command is as follows:

#adduser Tommy//Add a user named Tommy
#passwd Tommy//Change Password
Changing password for user Tommy.
New UNIX Password://Enter password here
Retype new UNIX Password://re-enter password
Passwd:all authentication tokens updated successfully.

2. Give root permission

Method One: Modify the/etc/sudoers file, find the line below, and remove the previous comment (#)

# # allows people in group wheel to run all commands
%wheel all= (All)

The user is then modified to belong to the root group (wheel), and the command is as follows:

#usermod-G root Tommy

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

Method Two: Modify the/etc/sudoers file, find the following line, and add a row under Root, as follows:

# # Allow ROOT to run any commands anywhere
Root all= (All)
Tommy All= (All)

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

Method Three: Modify the/etc/passwd file, find the following line, modify the user ID to 0, as follows:

Tommy:x:500:500:tommy:/home/tommy:/bin/bash

After the modification as follows

Tommy:x:0:500:tommy:/home/tommy:/bin/bash

Save, with the Tommy account login, the direct access is the root account permissions.

Friendship Reminder: Although method three looks simple and convenient, but generally do not recommend use, recommended use of method two.

< turn from End >

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But it looks like the red bold Su--I usually use sudo. I don't know if the writer is a clerical error or something, because with Su, you need to know the root password, so sudo will be better.