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Text File  |  1986-12-10  |  132 b   |  8 lines
  1. BEGIN { host = "@" }
  2. ($2 == "IN" && ($3 == "A" || $3 == "CNAME")) {
  3.     if ($1 != host) {
  4.     host = $1
  5.     printf("%s\n", host);
  6.     }
  7. }
  8.