Are you trying to run a dedicated server on your Linux machine?
You should upgrade your operating system, some of the dependencies required to run the etjump are not match, most specifically you need GLIBCXX_3.4.20 to be installed.
Are you trying to run an etjump 2.3.0 server using game server hosting?
This is not simple, you have to manually ask your game hosting company to update the software in order to run the etjump 2.3.0, tell them that you need your server to have GLIBCXX_3.4.20 installed. In some cases they will refuse to do so, it's up to you to decide, whether you want to change the hosting or not.
I'd agree with Vallz here, but I would have been up for this... I had created 2 maps for runs. Crypt_Run and Parkour_Run ...and Sonic if you want to include such a thing! I rather liked making runs, but they never got played at all. This idea is more for another mod such as ETRUN, which already has records and timerun type events going on already with Quake 3 defrag maps.
It's a nice idea, but the community wouldn't go for it I don't think...