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networks(5)

networks(5)                      File Formats                      networks(5)

NAME
       networks - network name database

SYNOPSIS
       /etc/inet/networks


       /etc/networks

DESCRIPTION
       The  networks  file is a local source of information regarding the net‐
       works a system may need to know the names of. The networks file can  be
       used  in  conjunction  with, or instead of, other networks sources, in‐
       cluding the NIS maps networks.byname and networks.byaddr, and ipNetwork
       objects in an LDAP directory. Programs use  the  getnetbyname(3C)  rou‐
       tines to access this information.


       The network file has a single line for each network, with the following
       information:

         official-network-name network-number aliases



       Items are separated by any number of SPACE or TAB characters. A '#' in‐
       dicates  the  beginning  of  a comment. Characters up to the end of the
       line are not interpreted by routines which search the file.


       Network numbers may be specified in the conventional dot ('.') notation
       using the inet_network(3C)  routine.  Network  names  may  contain  any
       printable  character  other than a field delimiter, NEWLINE, or comment
       character.

SEE ALSO
       getnetbyaddr(3C), getnetbyname(3C), inet_network(3C), nsswitch.conf(5)

NOTES
       The official SVR4 name of the networks file is /etc/inet/networks.  The
       symbolic link /etc/networks exists for BSD compatibility.


       The  network number in networks database is the host address shifted to
       the right by the number of 0 bits in the address mask. For example, for
       the address 24.132.47.86 that has a mask of fffffe00, its network  num‐
       ber  is 803351. This is obtained when the address is shifted right by 9
       bits. The address maps to 12.66.23. The trailing 0 bits should  not  be
       specified.  The network number here is different from that described in
       netmasks(5).  For  this  example,  the  entry  in  netmasks  would   be
       24.132.46.0 fffffe00.

Oracle Solaris 11.4               2 Feb 2021                       networks(5)
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