##
$ ./hackslash.pl
Use of uninitialized value $\ in concatenation (.) or string at ./hackslash.pl line 6.
./hackslash.pl8 path \\127.0.0.1\ak
##
##
# note the backslash in front of the dollar sign
my $path = "\\\\127.0.0.1\\c\$\\bak\\";
##
##
$ ./hackslash.pl
./hackslash.pl8 path \\127.0.0.1\c$\bak