Some App Installation and Hard Drive Mounting Basics
Think it's just
sudo apt install snapd.
Know that, sometimes in order to update applications that you install via Snap need to be updated with a command like
snap refresh or
snap refresh <app_name>. Run
snap refresh --help for more information.
Generic upgrade line
sudo apt-get update && sudo apt-get dist-upgrade is a good way to upgrade everything.
How to install from an AppImage if it's not going easily
This tutorial instructs to right-click the download appimage file, go to "Properties" > "Permissions" and then check "Allow executing file as program". Alternatively
chmod u+x <AppImage File> to make it executable.
How to mount an external hard drive that's formatted as exFAT
Simply install these programs by running this line:
sudo apt-get install exfat-fuse exfat-utils (via).
The Arch Wiki has an entry on desktop entries, which notes
Desktop entries for applications, or .desktop files, are generally a combination of meta information resources and a shortcut of an application. These files usually reside in
/usr/local/share/applications/for applications installed system-wide, or
~/.local/share/applications/for user-specific applications. User entries take precedence over system entries.
Desktop file example
~/.local/share/applications/standard-notes.desktop paste the following:
[Desktop Entry] Type=Application Name=StandardNotes Exec=/home/$USER/standard-notes/standard-notes-*-x86_64.AppImage Icon=/home/$USER/standard-notes/standard-notes.png Terminal=false Categories=Office;Notes;
See the page on Standard Notes for more.