but I think redshift is installed in zorin lite by default, and we can get it in the systray in taskbar. a lot of new zorin lite users don't enable status tray plugin , I have noticed that especially with zorin lite pro users. so ensure first u enable status tray plugin( I mean does u have icons for WiFi or Ethernet in the taskbar? if yes then do like as in the above posts, if u don't have u can enable status tray plugin