root@raspberrypi ~ > f start
/usr/sbin/f: 16: /usr/sbin/f: -A: not found
/usr/sbin/f: 18: /usr/sbin/f: -I: not found
/usr/sbin/f: 20: /usr/sbin/f: -A: not found
/usr/sbin/f: 22: /usr/sbin/f: -I: not found
/usr/sbin/f: 24: /usr/sbin/f: -A: not found
/usr/sbin/f: 26: /usr/sbin/f: -A: not found
/usr/sbin/f: 28: /usr/sbin/f: -A: not found
/usr/sbin/f: 30: /usr/sbin/f: -A: not found
/usr/sbin/f: 32: /usr/sbin/f: -A: not found
/usr/sbin/f: 34: /usr/sbin/f: -A: not found
/usr/sbin/f: 36: /usr/sbin/f: -A: not found
/usr/sbin/f: 38: /usr/sbin/f: -A: not found
/usr/sbin/f: 39: /usr/sbin/f: -A: not found
/usr/sbin/f: 40: /usr/sbin/f: -A: not found
/usr/sbin/f: 41: /usr/sbin/f: -A: not found
Firewall wurde aktiviert, der Server ist geschützt