Linux User actions

1. Add Users

First, add an ordinary user with the AddUser command, with the following command:
#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
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 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.

3. Authorization

Another way of authorizing is to assign a file/folder to a user

Chown  User name  file path

Linux User actions