Linux – How to edit previous lines in a multiple line command in Bash

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When entering a command which spans multiple lines in Bash, how do I edit previous lines? I'm a Linux Mint (Lisa) user using GNOME Terminal.

For example, let's say I type:

$ echo "foo bar
> baz
>

And then when I'm about to type the third line of the command, suddenly realize I want "foo" and "bar" to be on separate lines. How would I reposition my cursor between "foo" and "bar" such that I could press enter and put them on separate lines?

(It's not easy like you might think. Up arrow doesn't work, neither does Ctrl-P. So please, try it out before posting! Thanks!)

Best Answer

That, unfortunately, is up to bash, not to the terminal. Your options are:

  1. Use semicolons instead of newlines, although even then you can't move up a screen line at a time but must use character or word motion commands. (Oddly, zsh at least lets you move within a compound command when editing history, just not within the current command.) Sometimes fc (which tosses you into your editor with the previous command) is the easiest way to handle compound commands.

  2. If you are using Bash, use the following key combination:

    ctrl x e
    

    It will open up the command you are working on using your text editor. Save the file and quit. (I found the command on the Shell Hater's presentation.) Zsh users have this alternative.