LXer: Grep command in Linux explained
 

Published at LXer:

The grep command is a hugely powerful way to search through files. Like many command line utilities, once you're comfortable using it, you will discover that it is surprisingly fast and accurate. However, many Linux users only bother to learn one or two grep options and then use them as a kind of one-size-fits-all approach to searching. A little time spent learning what grep can do will pay dividends – and there's nothing more satisfying than knowing exactly how to use a command to find something in a jiffy.

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