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Full Discussion: remove a line within a file
Top Forums UNIX for Dummies Questions & Answers remove a line within a file Post 302184183 by new2ss on Thursday 10th of April 2008 09:44:19 PM
Old 04-10-2008
remove a line within a file

Hi all, i have a text file similar to below
Code:
A1
A2
A3
B1 ... .... *** # first occurance
B1 ... .... *** # second occurance 
B1 ... .... *** # third occurance

My desired output is
Code:
B1 ... .... *** # second occurance
B1 ... .... *** # third occurance

I want to remove the first line that is after the A's.

I have a primitive method
Code:
 /cat myfile | grep B >> desired_file

I only managed to remove the lines beginning with A. What can i next do to remove the first line from the results of grep-ping B?
 

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ZGREP(1)						      General Commands Manual							  ZGREP(1)

NAME
zgrep - search possibly compressed files for a regular expression SYNOPSIS
zgrep [ grep_options ] [ -e ] pattern filename... DESCRIPTION
Zgrep invokes grep on compressed or gzipped files. These grep options will cause zgrep to terminate with an error code: (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*). All other options specified are passed directly to grep. If no file is specified, then the standard input is decompressed if necessary and fed to grep. Otherwise the given files are uncompressed if necessary and fed to grep. If the GREP environment variable is set, zgrep uses it as the grep program to be invoked. EXIT CODE
2 - An option that is not supported was specified. AUTHOR
Charles Levert (charles@comm.polymtl.ca) SEE ALSO
grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1) ZGREP(1)
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