[gifford@gifford gifford]$ perl -e'$SIG{KILL}=sub { die "KILL signal caught"; }; sleep(10)' &
[1] 4316
[gifford@gifford gifford]$ kill -9 4316
[gifford@gifford gifford]$
[1]+  Killed                  perl -e'$SIG{KILL}=sub { die "KILL signal caught"; }; sleep(10)'