WARNING. OUTDATED! The information on this page is severely out of date. Don't use it! Ubuntu systemd service file for Redis. The server was updated to a Ubuntu 15.04 (Vivid Vervet) distribution. Redis was installed from the PPA from Roman Wookey (https://launchpad.net/~rwky/+archive/ubuntu/redis). After the switch to systemd instead of Upstart,…

redis-server.service

[Unit]
Description=Redis Datastore Server
After=network.target

[Service]
Type=forking
PIDFile=/var/run/redis/redis.pid
ExecStartPre=/bin/mkdir -p /var/run/redis
ExecStartPre=/bin/chown redis:redis /var/run/redis

ExecStart=/sbin/start-stop-daemon --start --chuid redis:redis --pidfile /var/run/redis/redis.pid --umask 007 --exec /usr/bin/redis-server -- /etc/redis/redis.conf
ExecReload=/bin/kill -USR2 $MAINPID

[Install]
WantedBy=multi-user.target

What configuration should I add in the [Unit] section to make the service-disabled by default. Or any other options to make this by code will be really helpful

Just a remark: The original gist is really, really old. Ubuntu has reached the 20.10 version, so today these hints are outdated.
If you want to handle a systemd service, read the instructions for systemctl. To disable a service, a command like
"sudo systemctl disable " will be used.
And/or use Google to search for recent documentation, there are plenty of websites which describe systemd/systemctl, e.g. here: https://linoxide.com/linux-how-to/enable-disable-services-ubuntu-systemd-upstart/

Thanks & Kind regards