Grep negative matching Post: 302842021

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Grep for a negative number

Hi, I want to search for a return code of -3. Using grep "-3" *.* is giving a syntax error. Please suggest as to how can we search for this pattern using grep. Thanks, Krishna

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grep only word matching the pattern

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Hello, I am trying to write a bash script which will give me the most negative number. Here is an example input: Ce 3.7729752124 -4.9505731588 -4.1061257680 Ce -6.9156611391 -0.5991784762 7.3051893138 Ce 7.6489739875 0.3513020731 ...

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I am trying to understand what the grep command in ubuntu is trying to do here. The contents of my test file is given below harsha@harsha-H67MA-USB3-B3:~/Documents$ cat data abcd efghi jklmno pqr stuv wxyz When I grep for 3 dots (...) without the parenthesis as follows I would expect the...

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zgrep

ZGREP(1)						      General Commands Manual							  ZGREP(1)

NAME

       zgrep - search possibly compressed files for a regular expression

SYNOPSIS

       zgrep [ grep_options ] [ -e ] pattern filename...

DESCRIPTION

       Zgrep  invokes  grep  on  compressed  or  gzipped  files.   These  grep	options  will  cause  zgrep  to  terminate  with  an  error  code:
       (-[drRzZ]|--di*|--exc*|--inc*|--rec*|--nu*).  All other 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 the GREP environment variable is set, zgrep uses it as the grep program to be invoked.

EXIT CODE

       2 - An option that is not supported was specified.

AUTHOR

       Charles Levert (charles@comm.polymtl.ca)

SEE ALSO

       grep(1), gzexe(1), gzip(1), zdiff(1), zforce(1), zmore(1), znew(1)

																	  ZGREP(1)

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Grep for a negative number

Discussion started by: kzmatam

2. UNIX for Dummies Questions & Answers

grep only word matching the pattern

Discussion started by: poova

3. Shell Programming and Scripting

Grep for the most negative number

Discussion started by: sdl27789

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Matching text using grep

Discussion started by: CiCa