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Nice. Indeed quite similar. Great minds think alike hehe.

All of your examples include a "!", which is a special character in bash. Sure that works without quoting?

to save you the trouble of finding out for your self: yes, it works (! is not that special)

I eventually have to figure out what ! does. In my she'll it always leads to errors about some events and whatnot. I shall Google and find out ;-)

Oh wow ! is quite powerful. Some of these bang commands are quite questionable, but hey... Like !12 runs the 12th command from the bash history. That's seems super dangerous to me.

Here's a good collection of tricks like that:

https://github.com/jlevy/the-art-of-command-line

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