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I don't even know how those tools are called together, but i think they make linux a very powerful OS. Do you know any good tutorials to learn those?

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up vote 5 down vote accepted

An old Unix spell book called,Unix Text Processing that is still useful today, even on Ubuntu, is available here; download PDF, open with Evince, read and enjoy!

grep on page 301, uniq on page 323

Text Processing in Linux should also be helpful,

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What you are looking may fit in "Text processing". This is a quick introduction:

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