Ubuntu Update Commands

What the update commands do in Ubunto.

• apt-get update: Updates the list of available packages and their versions, but does not install or upgrade any packages.
• apt-get upgrade: Installs newer versions of the packages you have installed.
• apt-get install: Installs one or more package(s) on your system.
• apt-get remove: Removes one or more package(s) from your system.
• apt-get autoremove: Removes packages that were automatically installed to satisfy dependencies for other packages and are no longer needed.
• apt-cache search: Searches for a package by keyword.
• apt-cache show: Displays detailed information about a package.
• apt-cache policy: Shows the version of a package that would be installed with apt-get install.
• apt-get clean: Removes files that were downloaded to install packages from the package manager’s cache.
• apt-get autoclean: Removes all but the latest versions of packages from the package manager’s cache.