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Top Forums Shell Programming and Scripting Search text file, then grep next instance of string Post 302556235 by Akilleez on Saturday 17th of September 2011 11:11:16 AM
Old 09-17-2011
Search text file, then grep next instance of string

I need to be able to search for a beginning line header, then use grep or something else to get the very next instance of a particular string, which will ALWAYS be in "Line5". What I have is some data that appears like this:

[1] Line1
Line2
Line3
Line4
Line5
Line6
Line7

[2] Line1
Line2
...

In my case, there are up to 1000 numbered beginner lines. I will be keying off of data from line 1, and I know the information I want is in Line5, every time. So, how do I search for the relevant beginning "Line1", then extract the next instance of "Line5" to use?

Thanks!
 

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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 is used to invoke the grep on compress'ed or gzip'ed files. All options specified are passed directly to grep. If no file is speci- fied, 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 zgrep is invoked as zegrep or zfgrep then egrep or fgrep is used instead of grep. If the GREP environment variable is set, zgrep uses it as the grep program to be invoked. For example: for sh: GREP=fgrep zgrep string files for csh: (setenv GREP fgrep; zgrep string files) AUTHOR
Charles Levert (charles@comm.polymtl.ca) SEE ALSO
grep(1), egrep(1), fgrep(1), zdiff(1), zmore(1), znew(1), zforce(1), gzip(1), gzexe(1) ZGREP(1)
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