Disabling the password prompt for sudo users

Often, GNU/Linux users come across the sudo utility. But on executing any command with sudo requests, users have to provide their own passwords once, which can then be used afterwards.

$ sudo vim /etc/sudoers
[sudo] password for tom:

To disable this sudo password prompt, edit the /etc/sudoers file as follows:

sudo vim /etc/sudoers

and change...

%sudo ALL=(ALL:ALL) ALL

...to

%sudo ALL=(ALL:ALL) NOPASSWD: ALL

Save the file and check for the changes. You are now free to execute anything without entering passwords.

Command line shortcuts

Here goes some tips to speed up our work.

cmd1;cmd2

The above command will run cmd1 and then execute cmd2.

cmd1 && cmd2

This will execute cmd2 if cmd1 is successful.

cmd1 || cmd2

The above sequence will run cmd2 if cmd1 is not successful.

Ctrl+a

This will move the control to the beginning of the line in CLI.

Ctr+e

The above command will move the control to the end of the line in CLI.

!ser :p

The above command will print the last command starting with 'ser'.