This Blog Post is going to be updated with new helpful Terminal Commands as I Am going to discover them.

KDE (Linux) - Hide titlebars when maximized

kwriteconfig5 --file ~/.config/kwinrc --group Windows --key BorderlessMaximizedWindows true
qdbus org.kde.KWin /KWin reconfigure

Reset Launcher with rearrange programs alphabetically (macOS)

defaults write ResetLaunchPad -bool true && killall Dock

HomeBrew (macOS) - Delete all unused dependencies

brew bundle dump
brew bundle --force cleanup

Remove old Git branches that no longer exist on remote

git remote prune origin