I figured I'd consolidate all of those for future use.
@TheOuterLinux that's not an official client and is for the legacy and osrs clients. My steps get the official NXT client working.
@afarian In my client, you open the settings and then choose the Parameter File to change the server type, so I can play oldschool, new, and custom servers. I think I may have installed unix-runescape-client since Debian has it in their repos and then did the Hikari Knight solution on top of it to get things working. Trust me, it's better and they haven't messaged me or suspended my accounts or anything. Matter of fact, unless they changed things, the RS Linux link used to go to Hikari Knight.
@TheOuterLinux the hikari client is Java, right?
The social network of the future: No ads, no corporate surveillance, ethical design, and decentralization! Own your data with Mastodon!