You are working on a linux workstation. you need to resync index package sources to prepare for an upgrade. We use update command.
This command is used to synchronize the package index files from their sources again. You need to perform an update before you upgrade or dist-upgrade. Command line interface is used in form of a messenger conversation with your computer. You specify the exact location of a file, which is the pwd to it.
The Command Line Interface (CLI), is said to be a non-graphical, text-based interface attached to the computer system. It is where the user input in a command and the computer then successfully executes it. The Terminal is known to gives the command line interface (CLI) environment to the user.
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