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sources/tech/awk/Part 1 - How to Use Awk and Regular Expressions to Filter Text or String in Files.md
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How to Use Awk and Regular Expressions to Filter Text or String in Files
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![](http://www.tecmint.com/wp-content/uploads/2016/04/Linux-Awk-Command-Examples.png)
When we run certain commands in Unix/Linux to read or edit text from a string or file, we most times try to filter output to a given section of interest. This is where using regular expressions comes in handy.
### What are Regular Expressions?