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Mac – How to clear a file’s contents using Terminal command

A quick trick to empty a file using Terminal on Mac.

1. Open Terminal

2. enter the following command in Terminal

cat /dev/null > fileName

If you get a warning Permission Denied you can do the following trick.

sudo sh -c 'cat /dev/null > fileName'

By Jonathan Whiting

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`echo “” > fileName`

Also does the trick.

Hi Gijs,

Great tip, thanks for posting