I’m using NFS to share my directory with VirtualBox, it’s quite annoying to type my password each time I run vagrant up. Vagrant has some scripts to overcome this for other distros but none was found for Manjaro (can’t post link yet)
For ubuntu
That looks like it is supposed to be an addition to your sudoers file.
You should take care when editing that file … always use visudo for the task.
(example, assuming you have not set the env var, SUDO_EDITOR=nano sudo visudo)
As to the content itself … well I can say that its odd it wants to move all of tmp and the init.d lines are deprecated on systemd systems.
(we also dont use sbin exactly … but it is a symlink for compatibility)