How to segregate a section from big file?

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LEARN ABOUT OSF1

nets

nets(4) 						     Kernel Interfaces Manual							   nets(4)

NAME

       nets - JOIN DHCP server database

DESCRIPTION

       The  nets file is employed by joind, the JOIN DHCP server, to tell it which networks to administer and the ranges of IP addresses available
       for dynamic assignment on each of those networks.

   FORMAT
       Blank lines and lines beginning with the number sign (#) are ignored.  Entries are  separated  from  one  another  by  newline  characters.
       Entries	consist  of  three  fields: the network number (expressed as an IP address), the IP address or name of a host running joind, which
       dynamically configures clients on the network, and a range of available addresses for dynamic allocation to hosts on the net. The range	is
       expressed as a pair of IP addresses separated with a dash (-). There must be no whitespace separating the dash from the IP addresses.

       Several	servers  may  administer  a single network, and a single server may administer several networks. Each network-server pair may have
       several ranges of IP addresses available for dynamic allocation.  The network and server IP addresses do not have to be repeated  for  each
       entry.  A line containing a single field is assumed to be an IP range with the same server and network as the previous entry: a line of two
       fields is assumed to be a server address and IP range with the same network as the preceding entry.

       The ranges of addresses served by each cooperating server must be disjoint.  This condition is checked by the server on startup.

RELATED INFORMATION

       joind(8), join.ipaddresses(4) delim off

																	   nets(4)

Shell Programming and Scripting