Find and remove files with pattern in bash
Useful command to remove files that start with "._" (no quotes), for some reason tar command in OS X creates those files and I found an app having problems with them, here is how to get rid of those unnecessary hidden files:
find . -name *._* -exec rm -f {} \;
BASH: Rename multiple files with sequential number at end
Spent way too much time trying to do this, hope this help someone else:
i=1;for f in *.jpg; do mv "$f" "newname$i.jpg"; let i++; done
Extract emails from big text file
Fount it here:
perl -wne'while(/[\w\.\-]+@[\w\.\-]+\w+/g){print "$&\n"}' emails.txt | sort -u > output.txt
Simulate load on linux serve with one-line command
Some days ago I needed a quick way to simulate load on a Linux sever. While there are many tools that can do this, all I needed was a simple bash one-line command that can make the CPUs beg for mercy.
What I ended up using is this:
dd if=/dev/zero bs=100M | gzip | gzip -d | gzip | gzip -d | gzip | gzip -d > /dev/null &
Send a few of these to the background and you'll start seeing smoke coming from your server soon.
Bash sequences
A very helpful command I like to use to organize folders is:
for i in {a..z}; do mkdir $i; done
This creates a folder for each letter from "a" to "z".
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@HersonCruz
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01 Introduction to Project Caua: http://t.co/uqownsPtan via @youtube
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I liked a @YouTube video http://t.co/Q5cY3FDYrC 01 Introduction to Project Caua
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Project Cauã: revolutionising IT for the masses - http://t.co/tGPtbPQvJY via @techworldnews ¿Cuándo en nuestro querido SV?
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Photo: I’m watching Law & Order: Special Victims Unit 62 others are also watching. Law & Order: Special... http://t.co/Dvg4CrKzpw