or download this
c:\@Work\Perl>perl -wMstrict -le
"for ('filesystem kbytes used avail capacity mounte
+d on',
...
"
'filesystem kbytes used avail capacity mounted on'
+-> 'Match Error'
'/dev/dsk/c0b0t0d0s4 12209400 5496486 6712914 46% /home' -> '4
+6'