CAUTION: if You simply use one > you can overwrite the contents with the file. Making sure that would not ever happen, you'll be able to include set -o noclobber on your . Take note: I initially just intended to point out this in my comment to Bob Enohp's reply. https://donovanhvgrh.blog-kids.com/37462073/new-step-by-step-map-for-cat-store