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Is there any way to undo edition of command in terminal? E.g. I have long string which I edited before running command, and I want to undo some of those edits before pressing ENTER.

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If you activate vi or emacs mode (set -o emacs or set -o vi ) you can use many advanced features like 'undo'. The default is emacs mode, so ctrl-_ should already do an undo.

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+1. as this is handled by bash's Readline facility, the OP might be interested in this answer that provides some of the basics of bash shortcuts: superuser.com/questions/113103/… .. another answer to that question provides this link for bash's vi mode: hypexr.org/bash_tutorial.php#vi – quack quixote Mar 4 '10 at 23:15
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