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For Linux Mint 18.3 (and probably versions close to this):* Menu -> Preferences -> Power Management -> Power Options* Menu -> Preferences -> Screensaver -> Settings=== PREVENT CONSOLE MONITOR BLANK ===This is like sleep mode, the monitor screen goes blank after a period of inactivity until a key press.Modify the .bash_profile in your home directory. echo "setterm -blank 0" >> .bash_profileFROM: [[How Do I: A Linux Q&A]]=== Disable Screen Lock ===There is two steps involved into completely disabling the lock screen in Unity.*Go to Brightness & Lock panel from the Unity Launcher. And set Turn screen off when inactive: to Never*Install "Unity Tweak Tool" with sudo apt-get install unity-tweak-tool. Run it from the Launcher and select System > Security > Enhance system security by disabling Desktop lockFROM: [[Kubuntu and Ubuntu Linux Distribution Reference]]===turn off screensaver and power-management===Use the "screen" or "brightness and lock" application. Click on the Unity Search and type "Brightness & Lock"In the "Brightness & Lock" interface disable "Dim screen to save power" and set "Turn screen off when inactive for: Never"You might find that the above solution is necessary, but not sufficient. The screen might still be blanking after 10 minutes. This is a default setting compiled into Xorg.To disabled it for the current session, run: xset s offYou can put this in your .xsession file to disable it upon every login.FROM: [[Kubuntu and Ubuntu Linux Distribution Reference]] [[Category:Computer Technology]][[Category:Linux]][[Category:Linux Distributions]][[Category:Ubuntu]]