[SYMBOL] [A] [B] [C] [D] [E] [F] [G] [H] [I] [J] [K] [L] [M] [N] [O] [P] [Q] [R] [S] [T] [U] [V] [W] [X] [Y] [Z] w command  2nd  3rd  Wall, Larry (Programming Perl)  WANs (Wide Area Networks)  war  warez  water damage      humidity      sprinkler systems  Wayner, Peter (Disappearing Cryptography)  web hosting, restricted filesystems and  web pages, Trojan horses in  web servers     logging      user account for  web sites     for this book      logging dowloaded files from      for RFCs      security-related  WebNFS  well-known ports  Welsh, Matt (Running Linux)  wheel group  2nd      members becoming superuser      using su command  who command  2nd  3rd  4th  5th  who service  whodo command  2nd  whois command  2nd  3rd  whois service  wide area networks (WANs)  window, time  [See time] windows (glass), security aspects  wireless networks     eavesdropping on      jamming      one-time passwords for      transmitter security  wireless transmission  [See radio transmissions] wiretapping  [See eavesdropping] WIZ command, SMTP  2nd  wizard's password (sendmail)  Wood, Charles Cresson (Computer Security: A Comprehensive Controls Checklist)  Wood, Patrick H. (UNIX System Security)  workstations  [See hardware] World Wide Web (WWW)  [See HTTP web sites] world-readable devices  world-writable files/directories  worm program  [See Internet worm program] worms  2nd  WRITE function (RPC)  write permission      directories      files  write program      timeouts on      Trojan horses and  write() system call  write-protection     backups      disk drive  wtmp file  2nd      displayed by last program      pruning      su command and  wtmpx file  2nd  wuarchive FTP daemon  wuftpd server  www user