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Homework and Emergencies Homework & Coursework Questions Student needs grep command help Post 303007968 by RudiC on Friday 24th of November 2017 05:21:37 AM
Old 11-24-2017
Quote:
Originally Posted by jetoutant
. . .
Code:
grep ECE 3\.[5-9] smallFile
grep 'ECE 3\.[5-9]' smallFile
grep ECE {3}\.[5-9] smallFile 
grep ECE '{3}\.[5-9]' smallFile

don't work to eliminate a 2or 4 before the dot
There's a fundamental difference between form 1, 3 and 4 and form 2 of your commands. Can you tell it?
Why shouldn't one form (which one?) work given you match the field separators in data file and regex?
 

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ZGREP(1)						    BSD General Commands Manual 						  ZGREP(1)

NAME
zgrep, zegrep, zfgrep -- print lines matching a pattern in gzip-compressed files SYNOPSIS
zgrep [grep-flags] [--] pattern [files ...] zegrep [grep-flags] [--] pattern [file ...] zfgrep [grep-flags] [--] pattern [file ...] DESCRIPTION
zgrep runs grep(1) on files or stdin, if no files argument is given, after decompressing them with zcat(1). The grep-flags and pattern arguments are passed on to grep(1). If an -e flag is found in the grep-flags, zgrep will not look for a pattern argument. zegrep calls egrep(1), while zfgrep calls fgrep(1). EXIT STATUS
In case of missing arguments or missing pattern, 1 will be returned, otherwise 0. SEE ALSO
egrep(1), fgrep(1), grep(1), gzip(1), zcat(1) AUTHORS
Thomas Klausner <wiz@NetBSD.org> BSD
December 28, 2003 BSD
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