setting a SUDO user in fedora ( configure SUDO)

First you need to become super user to add user to SUDO.

 
[ismail@localhost ~]$ su 
Password: 
[root@localhost ismail]# 

Now issue the command visudo


[root@localhost ismail]# visudo


Look the image and add the following line in that file you have opened

ismail ALL=(ALL) ALL

And if you want that when you do sudo it don't asks for passwrod than uncomment and this part

## Same thing without a password
 %wheel ALL=(ALL)       NOPASSWD: ALL
 

Now we have to add user (ismail) to wheel grounp issue this command

[root@localhost ismail]# gpasswd -a ismail wheel

Now you have done to check are you root user or not login as normal user and issue this command

[ismail@localhost ~]$ whoami 
ismail
[ismail@localhost ~]$ sudo whoami 
root