Add users under CentOS and give the user root access http://www.centoscn.com/CentOS/config/2014/0810/3471.html
1, add the user, first with the AddUser command to add a normal 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 your password here
Retype new UNIX Password://Enter password again
Passwd:all authentication tokens updated successfully.
2. Give root permission
Method One: Modify the/etc/sudoers file, locate the following line, 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 Tommy
You can now log in with your Tommy account and then use the command
Su-, you can get root privileges to operate.
Method Two: Modify the/etc/sudoers file, locate the following line, and add a line under root as follows:
# allow Root to run any commands anywhere
root all= (all) all
Tommy All= (All) all
After the modification, you can now log in with your Tommy account, and then use the command Su-to get root privileges to operate.
Method Three:To modify the/etc/passwd file, locate the following line and change the user ID to 0 as follows:
Tommy:x:500:500:tommy:/home/tommy:/bin/bash
Modified as follows
Tommy:x:0:500:tommy:/home/tommy:/bin/bash
Save, with Tommy account login, directly get the root account permissions.
Friendly reminder: Although method three looks simple and convenient, but generally not recommended use, recommended method two.
Embedded environment: Add users under CentOS and give users root access
