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Full Discussion: How to search for string A OR string B using Grep?
Top Forums UNIX for Dummies Questions & Answers How to search for string A OR string B using Grep? Post 302514882 by methyl on Monday 18th of April 2011 10:36:38 AM
Old 04-18-2011
Try "grep -E" which is actually the same as "egrep".

Note the use of the circumflex character to mean "line starting with" in grep.

Code:
grep -E "^BAT|^SAT" /usr/local/names.txt >filenames.txt

I don't understand your "extra white space" bit. Needs an example.

If you wanted to remove all white space then try this in the pipeline:
Code:
tr -d '[:space:]'

This User Gave Thanks to methyl For This Post:
jboy
 

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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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