services(4)                                                     services(4)




 NAME    [Toc]    [Back]
      services - service name data base

 DESCRIPTION    [Toc]    [Back]
      The file /etc/services associates official service names and aliases
      with the port number and protocol the services use.  For each service
      a single line should be present with the following information:

           <official service name>   <port number/protocol name>   <aliases>

      Port numbers 0 through 1023 are assigned by RFC 1700. This RFC also
      lists the conventional use of various ports with numbers greater than
      1023.

      Aliases are other names under which a service is known.  Library
      routines such as getservbyname() can be invoked with a service alias
      instead of the service official name.  For example:

           shell   514/tcp    cmd

      In this example, getservbyname() can be invoked with cmd instead of
      shell:

           sp = getservbyname("cmd", "tcp");

      instead of

           sp = getservbyname("shell", "tcp");

      Both produce the same results.

      A line cannot start with a space or tab.  Items are separated by any
      number of blanks (space or tab characters in any combination).  The
      port number and protocol name are considered a single item.  A / is
      used to separate the port and protocol (for example, 512/tcp).  A #
      character indicates the beginning of a comment.  Characters from the #
      to the end of the line are not interpreted by routines which search
      the file.

      Service names can contain any printable character other than a white
      space, newline, or comment character.  Trailing blanks (spaces or
      tabs) are allowed at the end of a line.

      Not all services listed in this file are available on HP-UX.

 EXAMPLES    [Toc]    [Back]
           shell           514/tcp   cmd
           telnet          23/tcp
           login           513/tcp





 Hewlett-Packard Company            - 1 -   HP-UX 11i Version 2: August 2003






 services(4)                                                     services(4)




 AUTHOR    [Toc]    [Back]
      services was developed by the University of California, Berkeley.

 FILES    [Toc]    [Back]
      /etc/services

 SEE ALSO    [Toc]    [Back]
      getservent(3N).


 Hewlett-Packard Company            - 2 -   HP-UX 11i Version 2: August 2003