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Top Forums UNIX for Dummies Questions & Answers delete lines Post 302477397 by saidineshbabu on Saturday 4th of December 2010 11:29:29 PM
Old 12-05-2010
i got this. But still i cant able to pass the variable.

sed -i '3,$/pattern/d' filename.txt

My requirement is:
Passing the pattern to variable a. file with $a (i.e) 12345 shoud delete all the lines from the first till the first occurrence of 12345. The pattern can be anything. So i need to read it and pass as a variable rather than hard coding it.

a=12345
sed -n '/$a/,$p' filename.txt

Am i clear? Please suggest.
 

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MCSENDER(8)						      System Manager's Manual						       MCSENDER(8)

NAME
mcsender - Multicast test tool to send multicast test packets SYNOPSIS
mcsender [-t<ttl>] [-i<interface>] ip:port DESCRIPTION
mcsender sends multicast packets to the specified IPv4 or IPv6 multicast address and port. The packets sent contain the string "this is the test message from mclab/mcsender ". OPTIONS
-t<ttl> Set the TTL (or hop limit for IPv6) to the specified value. -i<interface> Specify the interface to use for outgoing multicast datagrams. EXAMPLES
To send datagrams to IPv4 multicast address 239.1.1.1 and port 12345 with a TTL of 3: $ mcsender -t3 239.1.1.1:12345 To send datagrams to IPv4 multicast address 239.1.1.1 and port 12345 with a TTL of 3 out of interface eth1: $ mcsender -ieth1 -t3 239.1.1.1:12345 To send datagrams to IPv6 multicast address ff15::1 and port 12345 with a hop limit of 3: $ mcsender -t3 ff15::1:12345 To send datagrams to IPv6 multicast address ff15::1 and port 12345 with a hop limit of 3 out of interface eth1: $ mcsender -ieth1 -t3 ff15::1:12345 AUTHOR
mcsender was written by Carsten Schill <carsten@cschill.de>. Support for IPv6 was added by Todd Hayton <todd.hayton@gmail.com>. This manual page was written by Julien BLACHE <jblache@debian.org>, for the Debian project (but may be used by others). August 08, 2011 MCSENDER(8)
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