Sudo without password

How to use sudo command in Linux without the password prompt, by adding a line to the sudoers file.

Man page for logind.conf

Removing the sudo password prompt is done by editing the /etc/sudoers file, however you should never edit this file directly, but instead use sudo visudo to do so.

The file will look something like this:

# User privilege specification
root    ALL=(ALL:ALL) ALL

# Members of the admin group may gain root privileges
%admin  ALL=(ALL) ALL

# Allow members of group sudo to execute any command
%sudo   ALL=(ALL:ALL) ALL

There’s two ways to disable the password prompt.

Disable password prompt for a specific user

Use sudo visudo and add the following line to /etc/sudoers file:

username    ALL=(ALL) NOPASSWD: ALL

Disable password prompt for all sudoers

Use sudo visudo and edit the %sudo line in /etc/sudoers file:

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

After editing /etc/sudoers check the syntax is OK.

visudo -c
/etc/sudoers: parsed OK
/etc/sudoers.d/README: parsed OK