De acordo com esta resposta :
Unless a command has output or logging already configured,
rc.localcommands will not log anywhere.If you want to see logs for specific commands, try redirecting the stdout and stderr for
rc.localto somewhere you can check. Try adding this to the top of your/etc/rc.localfile.exec 2> /tmp/rc.local.log # send stderr from rc.local to a log file exec 1>&2 # send stdout to the same log file set -x # tell sh to display commands before executionThough this will require to rerun the
rc.localfile.