After proper research, `SIGKILL` should be prevented if possible;
Use `SIGTERM` instead
Source:
[In what order should I send signals to gracefully shutdown processes?](https://stackoverflow.com/a/37692419)
The `killall` command doesn't come shipped in all distributions (Void
Linux as an example), on the other hand `pkill` does.
Unsure what the exact intention on each call is but the `-9` signal can be
replaced with `-x` if the intention is not to end all instances.
Also note that I left `pkill -x Xorg` without the `-9` signal because
for some reason it won't function as expected and end up halting the
system (at least on Void Linux).
