The opk_server_0.15_lnx.zip file you have requested: Modifications / Operation Peacekeeper / Operation Peacekeeper Linux Files - 38.2mb is not available. Perhaps try browsing all files for the game Battlefield 2 and upload any files you want to share or are missing. This is the only information we could locate:
Operation Peacekeeper has released the 0.15 version of their mod. This is only the linux files; client files will be posted tomorrow some time. Enjoy!