The Linux command line is a text interface to your computer. Also known as shell, terminal, console, command prompts and many others, is a computer program intended to interpret commands. Allows users ...

One thing that's always bothered me about Linux, and UNIX before it, is that there isn't a decent command-line calculator available. You know, something where you can type in solve 5+8 or, better, ...

$ !? SHELL /bin/bash # More usefully, you can interactively search the command history at the console by hitting CTRL-R at the prompt and typing the section of the string you are looking for.