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Full Discussion: Using grep to select specific patterns in text file?
Top Forums UNIX for Beginners Questions & Answers Using grep to select specific patterns in text file? Post 302982613 by RavinderSingh13 on Friday 30th of September 2016 03:32:48 PM
Old 09-30-2016
Hello steezuschrist96,

Welcome to forums, hope you will enjoy learning and sharing knowledge here with us, could you please try following and let us know how it goes then.
Code:
awk '($0 ~ /^[IO]/ && $0 ~ /box$/ && $0 ~ /[IO].*[a-zA-Z].*box/)'  Input_file
OR more precisely
awk '($0 ~ /^[IO].*[a-zA-Z].*box$/)'   Input_file

Output will be as follows.
Code:
Inbox
Is a match box
Outbox

EDIT: You could use simple greptoo, I had tested this in GNU grep.
Code:
grep "^[IO].*[a-zA-Z].*box$"   Input_file

Thanks,
R. Singh
Last edited by RavinderSingh13; 09-30-2016 at 04:41 PM.. Reason: Added one more solution successfully too now.
This User Gave Thanks to RavinderSingh13 For This Post:
steezuschrist96
 

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LEARN ABOUT X11R4

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)
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