VR works just fine on linux. I’ve got the index and run it exclusively on a linux mint machine. It was a little rough around the edges a few years ago but has been running with no issues for the past couple years.

Setting a max password length is sometimes done to prevent ddos attacks. Without it, attackers could just spam 1MB passwords constantly and force the login server to just spend all its cpu time hashing garbage.

That being said, a password limit of under 20 characters probably just means they are just storing passwords in plaintext.

As soon as a bash command gets to multiple lines, i save it as a bash script and then edit it in a text editor.