16USING POSTGRESQL FROM THE COMMAND LINE

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Before computers featured a graphical user interface (GUI), which lets you use menus, icons, and buttons to navigate applications, the main way to issue instructions to them was by entering commands on the command line. The command line—also called a command line interface, console, shell, or terminal—is a text-based interface where you enter names of programs or other commands to perform tasks, such as editing files or listing the contents of a file directory.

When I was in college, to edit a file, I had to enter commands into a terminal connected to an IBM mainframe computer. The reams of text that then ...

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