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open ( CRON, "ssh host crontab -l" ) || die $!;
while ( <CRON> ) {
     print $_;
}

open ( RSYNC, "rsync -az -e \"ssh -o BatchMode=yes\" --delete-after ho
+st:/path/to/dir /path/to/backup |" );

while ( <RSYNC> ) {
     print "output: $_";
}