The aliases in the next example cause the shell to substitute ls -l each time you give an ll command and ls ‒F each time you use ls.The -F option causes ls to print a slash (/) at the end of ...

$ expr Linux : Linux 5 $ expr LinuxNow : Linux 5 $ expr Linux : LinuxNow 0 Getting help. You can get some help on using the expr command by using the –help option (expr –help).

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 ...

To display or reuse your previous command’s final argument, refer to it as !$ (echo !$). How to source files on the Linux command line If you want to avoid adding every command you enter to your ...

For many users who get started with the command line in Linux, there’s a good chance they’re using Bourne Again Shell, or Bash. Bash is the default shell on Mac OS X, and Windows users can use ...

Before learning to think in sed, awk, and grep, I generally accomplished the same tasks by hand-editing large volumes of command output in a text editor, then writing simple shell or perl scripts ...

In our case, this also means you can move a command-line argument into the middle of a sequence of commands being sent to a core Linux command like bc. For example: #!/bin/sh bc << EOF scale=4 $@ quit ...

“Ada.Strings.Unbounded.Text_IO.put_line(…” Thank goodness they didn’t think of calling the language Lovelace instead of Ada. The irony of such as verbose language having such a short name!

The command line isn't just for wise Linux beards. It's actually an awesome tool with almost limitless functionality. Here's a primer on how it works, and how you can do almost anything with it ...

If you've worked in the terminal, it's likely you're in some way proficient with the command history features of your shell. There's a lot more functionality than many realise however, and ...