Index Note: Page numbers followed by f indicate figures, t indicate tables and b indicate boxes. - - (comment character), 273 # (comment character) bash, 17 Perl, 75 Python, 39 #! (shebang), 8 && operator, 144 ./ prefix, 8 @@ symbol, 130 j (pipe), 17 jj operator, 144 + (concatenation operator), 38 + modifier, Python, 54 <? (short open) tag, 139 < symbol Perl, 88 Ruby, 114 <? php header, 139 > symbol, 88 >> symbol, 88 ` (backtick), 17 ; (semicolon), 75 @ARGV array, Perl, 79 ARGV structure Python, 41, 42, 43f Ruby, 111, 111b ARP (Address Resolution Protocol) requests, 103e106, 104b, 107f, 260e261 arp command, Windows, 260e261 @_ array, Perl, 78e79 arrays defined, 25e26 Perl, 79 PHP, 138e139, 141, 143e145, 147e149 Ruby, 102e106 authentication bypass, MySQL, 274f Autonomous LAN Party application, 243e245, 244f, 245f B b modifier, Python, 54 backtick (`), 17 Base64, 138, 139, 140f bash (Bourne-again shell), 8