* ''NNNN'' is the Tor control port number (default: 9051)
* ''hour1:min1'' is the time at which the script should set the Tor bandwidth to ''bandwidth1''
* ''bandwidth1'' is the bandwidth value, in any format Tor can understand. It should be put in quotes, because running the script as
'''torbandwctl.pl hh:mm 1 MB'''
will cause the "1 MB" part to be passed as two separate arguments.
* The & causes the script to be put in background by the shell (works under Bash). This is required (unless you can afford losing a terminal), because the script never exits.