2 of 2 Additional info

By default stdout and stderr of a systemd unit are sent to syslog. On my machine(Kali distro) it is stored in /var/log/syslog. So to see tor unit output run

cat /var/log/syslog | grep tor -i

Edit

In case someone needs to monitor tor unit i found a better way. Adding -f or --follow flag to journalctl makes it to continuously print new entries as they are appended to the journal. You can then pipe it to a parser and react based on it.

In one of your termianl tabs run

sudo journalctl -f -u tor@default | grep bootstrapped -i

in another tab do

sudo systemctl restart tor

You will see the results are appended to the first terminal as they are appended to the systemd journal