How to Downgrade Unifi Controller

unifi-os shell rm /tmp/unifi_sysvinit_all.deb &> /dev/null curl -o “/tmp/unifi_sysvinit_all.deb” <network application link.deb> curl -o “/tmp/unifi_sysvinit_all.deb” https://dl.ui.com/unifi/6.2.26-a79cb15f05/unifi_sysvinit_all.deb apt-get install -y /tmp/unifi_sysvinit_all.deb rm /tmp/unifi_sysvinit_all.deb