&>>file is a bash-ism for redirecting stdout and stderr. In a POSIX shell it puts the first (only) command in the background (without doing any redirections), then sets up a single redirection for the second command (which is empty). So you get no output at all.
Debian cron uses dash by default. Either add SHELL=/bin/bash to the top of the crontab, or change the redirection to the standard form, >> /home/dave/testOut.txt 2>&1.
Edited my post to question the use of &>> as you were making yours
Statistics: Posted by thagrol — Thu May 01, 2025 9:08 pm