HLSW for Linux (Ubuntu)
sudo apt-get install xqf
*Note: You may have to enable extra repositories in Synaptic, Adept, or Aptitude. Fedora guys might be able to use "yum."
HLSW (Half-Life Server Watcher) is a program for remotely managing a Half-Life game server using the Quake II rcon protocol/command set. This allows a server administrator to administer a Quake or Half-Life server without having Quake or Half-Life installed on a workstation. (useful on a laptop or non-gaming machine).
XQF is a program that offers similar rcon control from Linux. The "apt-get" command above will automatically install XQF on Ubuntu. It will install two packages:
The download is small (586kB, less than 1MB!).
Once installed, a short-cut should appear under "Games" in your Linux desktop menu. Alternately, you can launch xqf by typing "xqf" at a command prompt or console window.
Background of HLSW:
So lets say for example, you want to do routine maintenance on a game server, such as take the game server offline so that game parameters can be changed, or perhaps the disk needs to be scanned for errors. In order to find out if the server's empty, or to notify those players with a message you are about to take it down, you'd normally have to launch the game, connect to your own server just to find out if players are ready to leave.
HLSW for Windows is a free (not GPL) tool for administering game servers. It's great for beginners, and admins, and provides a single-interface for connecting to many different game types.
Unfortunately, HLSW does not make a version for Linux.
XQF allows you to manage a game server (in my instance Half-Life) without physically connecting to it from a Linux desktop. It is a GUI (graphical user interface) program that allows you to click and manage a Half-Life server remotely much like HLSW does. It's also GPL, which means you are free to redistribute the program and make modifications to its source code.
In the below side-by-side comparison, you'll notice XQF is almost a clone of HLSW:
The above XQF logo "XQF.png" works great as a med/hi-res icon for your linux shortcut. Hope this saves you some time in your struggles!