[ORIGINAL QUESTION]:
I follow these steps to download the official Linux binaries.
(logged in to my server via ssh on a non-root account with sudo)
cd downloads
wget ftp://ftp.idsoftware.com/idstuff/et/linux/et-linux-2.60.x86.run
chmod +x et-linux-2.60.x86.run
wget ftp://ftp.idsoftware.com/idstuff/et/linux/et-linux-2.60-update.x86.run
chmod +x et-linux-2.60-update.x86.run
./et-linux-2.60.x86.run
Verifying archive integrity... All good.
Uncompressing Enemy Territory 2.60 Full Install..............................................................................................................................................................................................................................................................................................................................
The recommended install location (/usr/local/games) requires root permissions.
Please enter the root password or hit enter to continue install as current user.
Password: <enter>
su: Authentication failure
Running setup as user
./setup.sh: 191: ./setup.sh: /home/crytiqal/.setup21138: not found
.
.
.
It shows the following output:
./setup.sh: 191: ./setup.sh: /home/crytiqal/.setup21138: not found
Any help is very much appreciated.
[SOLUTION]:
Following this post: https://help.ubuntu.com/community/EnemyTerritory
Dependencies:
64-bit Ubuntu 14.10
sudo dpkg --add-architecture i386
sudo apt-get update
sudo apt-get install libc6:i386 libdrm2:i386 libexpat1:i386 libgcc1:i386 libgl1-mesa-glx:i386 libglapi-mesa:i386 libglu1-mesa:i386 libstdc++6:i386 libx11-6:i386 libx11-xcb1:i386 libxau6:i386 libxcb1:i386 libxcb-dri2-0:i386 libxcb-dri3-0:i386 libxcb-glx0:i386 libxcb-present0:i386 libxcb-sync1:i386 libxdamage1:i386 libxdmcp6:i386 libxext6:i386 libxfixes3:i386 libxshmfence1:i386 libxxf86vm1:i386 libasound2:i386 libasound2-plugins:i386
It is then possible to run
./et-linux-2.60.x86.run
and continue with the installation as normal.

