I (and a fellow developer on a different project) have followed these guides: piinecone — Building and deploying a UE4 dedicated server for... A new, community-hosted Unreal Engine Wiki - Announcements - Unreal Engine Forums
and when we package a Linux build in Unreal (the editor) I get the following build errors (log in url, please look towards the end): http://pastebin.com/dsn2sjRR
Here is the Cook.txt file: http://pastebin.com/RRrx3EsV
Me and another developer have been trying to figure this stuff out, and are both stuck on the same(ish) problems with trying to get linux builds working, with the ultimate goal of having Linux dedicated servers working.
Thanks!