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Full Discussion: How to grep the exact name?
Top Forums Shell Programming and Scripting How to grep the exact name? Post 302498811 by alister on Tuesday 22nd of February 2011 01:38:40 PM
Old 02-22-2011
Code:
grep "^$rule," "$ifile3" > "$ofilegrp"

I'm not a fan of expanding parameters into a regular expression context unless I'm absolutely sure that metacharacters will not occur. In my opinion, it's preferable to use simple string comparison:

Code:
awk -F, -v r="$rule" '$1==r' "$ifile3" > "$ofilegrp"

Regards,
Alister
This User Gave Thanks to alister For This Post:
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LEARN ABOUT SUSE

lzegrep

XZGREP(1)							     XZ Utils								 XZGREP(1)

NAME

       xzgrep - search compressed files for a regular expression

SYNOPSIS

       xzgrep [grep_options] [-e] pattern file...
       xzegrep ...
       xzfgrep ...
       lzgrep ...
       lzegrep ...
       lzfgrep ...

DESCRIPTION

       xzgrep  invokes	grep(1)  on  files  which may be either uncompressed or compressed with xz(1), lzma(1), gzip(1), or bzip2(1).  All options
       specified are passed directly to grep(1).

       If no file is specified, then the standard input is decompressed if necessary and fed  to  grep(1).   When  reading  from  standard  input,
       gzip(1) and bzip2(1) compressed files are not supported.

       If  xzgrep  is  invoked as xzegrep or xzfgrep then egrep(1) or fgrep(1) is used instead of grep(1).  The same applies to names lzgrep, lze-
       grep, and lzfgrep, which are provided for backward compatibility with LZMA Utils.

ENVIRONMENT

       GREP   If the GREP environment variable is set, xzgrep uses it instead of grep(1), egrep(1), or fgrep(1).

SEE ALSO

       grep(1), xz(1), gzip(1), bzip2(1), zgrep(1)

Tukaani 							    2009-07-05								 XZGREP(1)
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