Sudo

Sudo

            Super User Do. The command SUDO permit a user with proper permission to execute the command as the Super User or other user the file /etc/sudoers control the SUDO access, editor and syntax checker.

# vi sudo ß fired for edit the file of SUDO configuration sudo is easy to configure.

1. For allow all root permissions to Sudo user.

# vi /etc/sudoers

:se nu                                             = Go to line no 78 and add users after root.

            76 root, nilesh    ALL=(ALL)       ALL

            :wq!

# su – nilesh

[nilesh@host ~]$ sudo su –                   =Enter user password.

2. For allow fire specified command to Sudo users.

# vi /etc/sudoers

:se nu              = Go to line no 20 copy(yy) it and paste(p) below this line

and create user alias.

            20 # User_Alias ADMINS = jsmith, mikem

21 User_Alias USER = nilesh

Bellow line no 24 add a new line and create command alias.

24 ## Command Aliases

25 Cmnd_Alias CMD = /usr/sbin/useradd, /usr/bin/passwd

Esc

:$                                           = For go to end of this file write in a new line for set value.

            97 USER ALL=CMD

:wq!

After that the nilesh user can able to run useradd and passwd commands.

# su – nilesh

[nilesh@host ~]$ sudo /usr/sbin/useradd kumar

[nilesh@host ~]$ sudo /usr/bin/passwd kumar