Delete Blank Lines Between DHCP Host Blocks Post: 302258709

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Top Forums Shell Programming and Scripting Delete Blank Lines Between DHCP Host Blocks Post 302258709 by joeyg on Saturday 15th of November 2008 12:35:49 PM

11-15-2008

Registered User

What about the following one-liner?

> cat file63
host example1 {
hardware ethernet 00:00:00:00:00:01;
fixed-address 192.168.135.2;
option subnet-mask 255.255.255.0;
option routers 192.168.135.1;
next-server 192.168.135.210;
filename "linux-install/pxelinux.0";
}

host example2 {
hardware ethernet 00:00:00:00:00:02;
fixed-address 192.168.135.3;
option subnet-mask 255.255.255.0;
option routers 192.168.135.1;
next-server 192.168.135.210;
filename "linux-install/pxelinux.0";
}

host example3 {
hardware ethernet 00:00:00:00:00:03;
fixed-address 192.168.135.4;
option subnet-mask 255.255.255.0;
option routers 192.168.135.1;
next-server 192.168.135.210;
filename "linux-install/pxelinux.0";
}

> cat file63 | tr -s "\n" >file63x ; cp file63x file63 ; rm file63x
> cat file63
host example1 {
hardware ethernet 00:00:00:00:00:01;
fixed-address 192.168.135.2;
option subnet-mask 255.255.255.0;
option routers 192.168.135.1;
next-server 192.168.135.210;
filename "linux-install/pxelinux.0";
}
host example2 {
hardware ethernet 00:00:00:00:00:02;
fixed-address 192.168.135.3;
option subnet-mask 255.255.255.0;
option routers 192.168.135.1;
next-server 192.168.135.210;
filename "linux-install/pxelinux.0";
}
host example3 {
hardware ethernet 00:00:00:00:00:03;
fixed-address 192.168.135.4;
option subnet-mask 255.255.255.0;
option routers 192.168.135.1;
next-server 192.168.135.210;
filename "linux-install/pxelinux.0";
}

joeyg

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LEARN ABOUT DEBIAN

prips

PRIPS(1)						    BSD General Commands Manual 						  PRIPS(1)

NAME

     prips -- print the IP addresses in a given range

SYNOPSIS

     prips [-c] [-d delim] [-e exclude] [-f format] [-i incr] start end
     prips [-c] [-d delim] [-e exclude] [-f format] [-i incr] CIDR-block
     prips -h

DESCRIPTION

     The prips tool can be used to print all of the IP addresses in a given range.  It can enhance tools that only work on one host at a time,
     e.g.  whois(1).

     The prips tool accepts the following command-line options:

     -c      Print the range in CIDR notation.

     -d delim
	     Set the delimiter to the character with ASCII code delim where 0 <= delim <= 255.

     -e <x.x.x,x.x>
	     Exclude ranges from the output.

     -f format
	     Set the format of addresses (hex, dec, or dot).

     -h      Show summary of options.

     -i incr
	     Set the increment to 'x'.

ENVIRONMENT

     The prips tool's operation is not influenced by any environment variables.

FILES

     The prips tool's operation is not influenced by any files.

EXAMPLES

     Display all the addresses in a reserved subnet:

	   prips 192.168.32.0 192.168.32.255

     The same, using CIDR notation:

	   prips 192.168.32/24

     Display only the usable addresses in a class A reserved subnet using a space instead of a newline for a delimiter:

	   prips -d 32 10.0.0.1 10.255.255.255

     Display every fourth address in a weird block:

	   prips -i 4 192.168.32.7 192.168.33.5

     Determine the smallest CIDR block containing two addresses:

	   prips -c 192.168.32.5 192.168.32.11

DIAGNOSTICS

     The prips utility exits 0 on success, and >0 if an error occurs.

SEE ALSO

     ipsc(1), gipsc(1)

STANDARDS

     No standards were harmed in the writing of the prips tool.

HISTORY

     The prips tool was originally written by Daniel Kelly and later adopted by Peter Pentchev.  This manual page was originally written by Juan
     Alvarez for the Debian GNU/Linux system and later added to the prips distribution and converted to mdoc format by Peter Pentchev.

AUTHORS

     Daniel Kelly <dan@vertekcorp.com>
     Juan Alvarez <jalvarez@fluidsignal.com>
     Peter Pentchev <roam@ringlet.net>

BUGS

     Please report any bugs in the prips tool to its current maintainer, Peter Pentchev.

BSD
								   March 1, 2011							       BSD

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