robbinhan/how-to-delete-lines-containing-a-given-string.md

## how-to-delete-lines-containing-a-given-string.md

      
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              how-to-delete-lines-containing-a-given-string.md
            
          
    How to delete lines containing a given string?

Just like last week, where we wanted to replace a string, we can use sed for this task:
sed '/pouet/d' file.txt
This will output file.txt on stdout without the lines containing pouet.
On Linux systems, you can add the -i option to delete the lines inplace.
On Mac systems you can use -i .bak to also delete the lines inplace, but you need to tell how to name the backup of the original file (named file.txt.bak in this example).