Software from third-party repositories (like PPA's) and external. Don't experiment on a production machineīe very careful with external repositories (like PPA's) and with external. Never remove any application that's part of the default installation of Ubuntu or Linux Mint
Don't enable the software repository 'romeo'
UKUU, Ubuntu Mainline Kernel Installer and mainline kernel PPA's Elevated danger level (yellow alert): Ubuntuzilla, UKUU and Ubuntu Mainline Kernel Installer High danger level (orange alert): Ubuntu Sources List Generator Severe danger level (red alert!): Ultamatix Never use installation scripts like Ultamatix, Ubuntu Sources List Generator, Ubuntuzilla, UKUU and Ubuntu Mainline Kernel Installer Don't install a second full-blown file manager Never use cleaning applications like BleachBit (nor defrag apps) Desklets and applets: think before you install Firefox and Chrome add-ons and extensions: don't trust them blindly Be careful with add-ons, extensions, applets and desklets Only use sudo, pkexec and admin:// when absolutely necessary
Be restrictive with root authority (administrative permissions) Be very careful with external repositories (like PPA's) and with external.
