KTX project pages on QW-DEV.net have detailed instructions on how to put up a server of your own.

You can either read KTX wiki or installation help that ships with the MVDSV+KTX package. You can find the installation package from either KTX downloads section or from MVDSV downloads section, it's identical/duplicated on both places.

The new and easy way of setting up a Linux server is by getting nQuakesv server installer. It's easy and fast, and it's recommended! Check the server link at http://www.nquake.com/

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The original first post url's doesn't work.

Go to nQuake and set the mouse cursor over the download button so u get a popup window and choose windows or linux server download.

Exaclty that.
It should be very easy to install.

more detail