$ dpkg -S /etc/init.d/stunnel4 stunnel4: /etc/init.d/stunnel4 $ dpkg -l|fgrep stunnel4 ii stunnel4 4.150-7 Universal SSL tunnel for network daemons
$ dpkg -S /etc/init. d/stunnel4 d/stunnel4
stunnel4: /etc/init.
$ dpkg -l|fgrep stunnel4
ii stunnel4 4.150-7 Universal SSL tunnel for network daemons