How to empty (“truncate”) a file on linux that already exists and is protected in someway?

Question

I have a file called error.log on my server that I need to frequently truncate. I have rw permissions for the file. Opening the file in vi > deleting all content > saving wo

Answer 1

You can also use function truncate

$truncate -s0 yourfile

if permission denied, use sudo

$sudo truncate -s0 yourfile

Help/Manual: man truncate

tested on ubuntu Linux