Here's an interesting Bash pattern I just used for the first time.

[trs@metasocial.com]

Here's an interesting Bash pattern I just used for the first time.

some-command <<<"$(< some/file)" >some/file

It reads all of some/file into memory before writing it to some-command's stdin. This lets some-command's stdout be redirected to some/file without the usual problems of reading/writing from the same file.

#unix #linux #bash

[simon@fedi.simonwillison.net]

@trs thanks for that - I learned two new bits of Bash I hadn't seen before: <<<"string" and $(< file), both of which I now know are slightly more efficient than the cat-pipe equivalents because they don't have to launch an additional process