This page describes how to install Valves HLDS (Half-Life Dedicated Server) for installing and running a game server for classic Half-Life 1 games.
Now we begin download the game files, in this example for Counter-Strike 1.6, by executing this command (where username and password is your steam one):
$ su hlds -C "/opt/hlds/steam -command update -game cstrike -dir /opt/hlds -username <username> -password <password>"
Of couse you can define the server settings in the game directory itself, for example by editing /opt/hlds/cstrike/server.cfg. Alternatively you could set the startup parameters in /etc/conf.d/hlds:
user=hlds # this setting won't work yet workingdir=/opt/hlds # this setting won't work yet params="-game cstrike -autoupdate +maxplayers 20 +port 27019 +map de_aztec"
Be sure you open or forwarded the port, e.g. 27019 UDP+TCP correctly!
Start the server
Starting the server is easy!
$ systemctl start hlds
To enable autostart, issue following command:
$ systemctl enable hlds