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Full Discussion: find pattern and replace the text before it
Top Forums Shell Programming and Scripting find pattern and replace the text before it Post 302466378 by balan1983a on Tuesday 26th of October 2010 09:41:56 AM
Old 10-26-2010
find pattern and replace the text before it
i am editing a big log file with the following pattern:

Code:
 
Date: xxxx          Updated: name
Some log file text here
Date: eee           Updated: ny
Some log file text here

Basically i want to remove all the text in a line before the "Updated" pattern. I sill want to print the other lines

Code:
Updated: name
Some log file here
Updated: ny
Some log file here

I really appreciate your help.



---------- Post updated at 08:41 AM ---------- Previous update was at 08:27 AM ----------




the title should be "find pattern and delete the text before it"
 

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LEARN ABOUT OPENDARWIN

exigrep

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

NAME

       EXIGREP - Search Exim's main log

SYNOPSIS

       exigrep [-l] pattern [log file] ...

DESCRIPTION

       The  exigrep  utility  is  a  Perl script that searches one or more main log files for entries that match a given pattern.  When it finds a
       match, it extracts all the log entries for the relevant message, not just those that match the pattern.	Thus, exigrep can extract complete
       log entries for a given message, or all mail for a given user, or for a given host, for example.

       The -l flag means 'literal', that is, treat all characters in the pattern as standing for themselves.  Otherwise the pattern must be a Perl
       regular expression.  The pattern match is case-insensitive.  If no file names are given on the command line, the standard input is read.

       If the location of a zcat command is known from the definition of ZCAT_COMMAND in Local/Makefile, exigrep  automatically  passes  any  file
       whose name ends in COMPRESS_SUFFIX through zcat as it searches it.

BUGS

       This manual page needs a major re-work. If somebody knows better groff than us and has more experience in writing manual pages, any patches
       would be greatly appreciated.

SEE ALSO

       exim(8), perlre(1), /usr/share/doc/exim4-base/

AUTHOR

       This manual page was stitched together from spec.txt by Andreas Metzler <ametzler at downhill.at.eu.org>, for the Debian  GNU/Linux  system
       (but may be used by others).

								  March 26, 2003							EXIGREP(8)
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