While I tried several times on install linux client on ubuntu, here's what I do
- download and unzip the el_133_linux_full.zip to a temp directory, for example: /home/username/temp, it will create a new directory Eternal Lands-1.33
- mkdir /usr/local/games/el
- mv /home/username/temp/Eternal Lands-1.33/* /usr/local/games/el
- cd /usr/local/games/el
You must run the game in root account, if running in user account, it abort or crash quickly.