Why does telnet failes with message "localhost Name or service not known"

Solution Verified - Updated -

Issue

  • why does telnet failes with message "localhost Name or service not known"
# telnet 0
Trying 0.0.0.0...
Connected to 0 (0.0.0.0).
Escape character is '^]'.
getaddrinfo: localhost Name or service not known
Connection closed by foreign host.

Environment

  • Red Hat Enterprise Linux 5x
  • telnet-server

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