[TriLUG] crontab question

[Michael Hrivnak]

What does it mean for the minute parameter in a crontab entry to begin with a 
"-" ?

for example, Kcron created this...

-10 2,14	/path/to/some/script

The script in question calls rsync.  I've been having a problem recently that 
a large number of instances of rsync get started on this client, along with 
an equivalent number of instances of rsync and sshd on the server side, 
resulting in a DoS.  When I run the script on its own though, it runs fine.

Any clues?

Michael