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Top Forums UNIX for Dummies Questions & Answers Unix "look" Command "File too large" Error Message Post 302516034 by shishong on Thursday 21st of April 2011 01:22:30 PM
Old 04-21-2011
Unix "look" Command "File too large" Error Message

I am trying to find lines in a text file larger than 3 Gb that start with a given string. My command looks like this:

$ look "string" "/home/patrick/filename.txt"


However, this gives me the following message:

"look: /home/patrick/filename.txt: File too large"


So, I have two questions.
1. How can I make this work with the "look" command and not any other commands such as "grep"?
2. If I were to use "grep", would it take longer than using "look", provided that I can somehow get "look" to work on this large file.

Thanks!
 

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BZGREP(1)						      General Commands Manual							 BZGREP(1)

NAME
bzgrep, bzfgrep, bzegrep - search possibly bzip2 compressed files for a regular expression SYNOPSIS
bzgrep [ grep_options ] [ -e ] pattern filename... bzegrep [ egrep_options ] [ -e ] pattern filename... bzfgrep [ fgrep_options ] [ -e ] pattern filename... DESCRIPTION
Bzgrep is used to invoke the grep on bzip2-compressed files. All 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 bzgrep is invoked as bzegrep or bzfgrep then egrep or fgrep is used instead of grep. If the GREP environment variable is set, bzgrep uses it as the grep program to be invoked. For example: for sh: GREP=fgrep bzgrep string files for csh: (setenv GREP fgrep; bzgrep string files) AUTHOR
Charles Levert (charles@comm.polymtl.ca). Adapted to bzip2 by Philippe Troin <phil@fifi.org> for Debian GNU/Linux. SEE ALSO
grep(1), egrep(1), fgrep(1), bzdiff(1), bzmore(1), bzless(1), bzip2(1) BZGREP(1)
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