Last Updated: February 25, 2016
· rbika

Three very useful command line tips

1. sudo !!
Runs the last command as root.

2. ^foo^bar
Runs the last command replacing the first occurrence of foo by bar.

3. > text.txt
Empty the file named text.txt. If the file doesn't exists, a new empty file is created.

You can check more useful tips at

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Important note about #2 is that it's not a global replace. See:

over 1 year ago ·

@shawncplus I should have said this. I updated the post, thx!

over 1 year ago ·

good list, CTRL-r is also pretty handy for long commands that you typed previously (tcpdump filters, quick one-liners)

over 1 year ago ·