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Shell Programming and Scripting
reading specific line from file
Post 70029 by RTM on Monday 25th of April 2005 10:42:35 AM
04-25-2005
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I have a requirement to go to particular line in the file and from there read the contents till it meets a particular criteria. For eg if the contents of the file is like
81 abcd ------------------- Line 1
82 cdfe ------------------- Line 2
83 dfj ------------------- Line 3
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Hello All,
Request you to let me know how to do the below urgently..
Requirement
File A Contains:
for i in file A
DEV1
DEV5
STG1
STG5
File B Contains:
for j in file B
DEV1
DEV5
STG1
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============================================
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So, I want to read line-by-line a text file with unknown number of files....
So:
a=1
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LEARN ABOUT POSIX
zgrep
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)