Grep pattern file and count occurances Post: 303013067

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Top Forums UNIX for Beginners Questions & Answers Grep pattern file and count occurances Post 303013067 by vgersh99 on Wednesday 14th of February 2018 11:30:20 AM

02-14-2018

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Quote:

Originally Posted by ahfze

Rudi thanks.
your command works fine but as both files are huge grep fails i think.
can you give me something equivalent in awk?

---------- Post updated at 10:04 PM ---------- Previous update was at 09:58 PM ----------

i think awk is the solution as both files are huge but ah.awk you gave doesnt work..the script just keeps running.no output.
can you check if there is any error in the codes please?

---------- Post updated at 10:22 PM ---------- Previous update was at 10:04 PM ----------

for my ah.awk i tried adding #! /usr/bin/awk -f in the top line.
still didnt work.

thanks guys for helping.

---------- Post updated at 10:30 PM ---------- Previous update was at 10:22 PM ----------

i think the issue here is not grep.
i think the while read line doesnt work for big files.
how do i replace it with awk?

works on the sample files you gave me. there must be something different with your actual files - and not just the size.

do cat -vet patternFile and post a sample output here (using code tags).

vgersh99

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LEARN ABOUT NETBSD

zfgrep

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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