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Summary

I created a backup of my entire Xonotic server config, including all pk3 files, on Github.

It includes complete instructions how you can set up this server by yourself, using a new (clean) VPS.

My server also displays those instructions on http://xonotic.us.to .


Instructions

Prepare the system. Install packages, setup xonotic user, use zsh:

apt install zip unzip zsh curl wget screen lighttpd vim php php-cgi php-mysql git rsync

# Oh my Zsh
sh -c "$(curl -fsSL https://raw.github.com/ohmyzsh/ohmyzsh/master/tools/install.sh)"

# --- > put your id_rsa.pub into /root/.ssh/authorized_keys
# also add your root account's id_rsa.pub, if you want to run cronjob backups

# keeps things all in one place 
rm -r /var/www/html
ln -s /home/xonotic/www /var/www/html
 
useradd -u 9005 -m xonotic -G root,audio -g www-data -s `which zsh`

su xonotic

unset ZSH
sh -c "$(curl -fsSL https://raw.github.com/ohmyzsh/ohmyzsh/master/tools/install.sh)"

Download the latest Xonotic autobuild ZIP and unzip:

cd /home/xonotic
wget https://beta.xonotic.org/autobuild/Xonotic-`date +%Y%m%d  --date="3 days ago"`.zip
unzip Xonotic-`date +%Y%m%d  --date="3 days ago"`.zip
rm Xonotic-`date +%Y%m%d  --date="3 days ago"`.zip

Download the maps and server config from my github repository:

git clone --depth=1 https://github.com/ballerburg9005/xonotic.us.to
 
rsync -ra xonotic.us.to/ ./
mkdir /home/xonotic/.xonotic/data/data
chmod 700 /home/xonotic/.xonotic/data/data
rm -rf xonotic.us.to

Special speedup for csprogs download. If you do this, you need to repeat it each time you update your Xonotic installation!

unzip /home/xonotic/Xonotic/data/xonotic-*-data.pk3 'csprogs.*'
touch csprogs
zip csprogs.serverpackage csprogs
zip /home/xonotic/.xonotic/data/csprogs-xonotic-autobuild.pk3 csprogs.*
rm csprogs.*

Edit /home/xonotic/.xonotic/data/server.cfg!:

export MYSERVER="example.com" # (or ip address like 15.26.37.48) THIS NEEDS TO BE CORRECT
sed "s/xonotic\.us\.to/$MYSERVER/g" -i /home/xonotic/.xonotic/data/server.cfg

# you can control the server if connected inside Xonotic as a player with this password
echo '//rcon_password "SuperSecret"' >  /home/xonotic/.xonotic/data/secret.cfg # remove //
chmod 700 /home/xonotic/.xonotic/data/secret.cfg

Seriously ... you have to edit the server.cfg by hand:

vim /home/xonotic/.xonotic/data/server.cfg

And the final steps:

exit # to root shell

chown root:root /home/xonotic/xonotic.service
ln /home/xonotic/xonotic.service /etc/systemd/system/xonotic.service

lighty-enable-mod fastcgi fastcgi-php dir-listing rewrite

systemctl daemon-reload
systemctl enable xonotic lighttpd 
systemctl start lighttpd xonotic


Probably smart to put a restart into crontab:

0 7 * * * systemctl restart xonotic


Useful commands

If you download new maps, then this gives you an updated list (paste it in server.cfg):

MAPUPDATE=;IFS=$'\n'; echo -n "\n\ng_maplist \""; for i in /home/xonotic/.xonotic/data/*.pk3; do if unzip -l "$i" | grep -q '\.bsp$'; then echo -n "$(unzip -l "$i" | grep '[^/]*\.bsp$' -osa | sed "s/\.bsp$//g" | tr '\n' ' ')"; fi; done; echo "\"\n\n"

Backup command for cronjob (on remote machine):

rsync --exclude 'Xonotic' -ra [email protected]:/home/xonotic/ /mnt/1/BACKUP/XONOTIC_SERVER/

SSH directly into interactive Xonotic server console (from remote machine):

XONOTICSERVER=; ssh -t [email protected] "su xonotic -c 'screen -r xonotic-server'"


Troubleshooting

Disable firewall or selinux:

iptables -I INPUT -j ACCEPT
echo 0 > /selinux/enforce


Github

If you are curious: To mirror my server files on Github, I simply created a new account there, added an access token to it and then on my main account I granted that user access to an empty repo. Then I logged in as xonotic on my server and edited the .git/config to include the user:accesstoken@ before the URL and changed it to my empty repo. I update the repo with a cronjob for the user xonotic:

GIT=;cd /home/xonotic/; git config --global http.postBuffer 1048576000; git pull; git submodule update --remote --recursive; git add -u; git add  * .*; git commit -m "."; git push

Note that the command needs to be tested first. Uploading the home directory to Github ordinarily is to be considered insecure, for good reason that do not apply to my case.