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Full Discussion: Grep multiple keywords from a file
Top Forums Shell Programming and Scripting Grep multiple keywords from a file Post 302997398 by wbport on Friday 12th of May 2017 02:30:31 PM
Old 05-12-2017
The way to do that is to create a list of files containing A1 and passing them to a grep that will look at only those files. To search for A3 the second grep would have to produce a list as well which you could save or pipe through.

The program xargs is very helpful for this in that it reads an input file or piped input, runs your command, and places every line of your input file as the last argument(s) of your command.
Code:
grep -l A1 {2nd parm for star name files if necessary} |tee my.list1
xargs <my.list1 grep -l A2 |xargs grep A3

If you will be doing a number of searches on files containing your first search term, creating a file with a list should be useful.

HTH
 

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LEARN ABOUT MOJAVE

scanlogs

SCANLOGS(8)						      System Manager's Manual						       SCANLOGS(8)

NAME

       scanlogs - summarize INN log files.

SYNOPSIS

       scanlogs [ norotate ] [ nonn ]

DESCRIPTION

       Scanlogs  summarizes  the information recorded in the INN log files (see newslog(5)).  By default, it also rotates and cleans out the logs.
       It is normally invoked by the news.daily(8) script.

KEYWORDS

       The following keywords are accepted:

       norotate
	      Using this keyword disables the rotating and cleaning aspect of the log processing: the logs files are only scanned for  information
	      and no contents are altered.

       nonn   Normally the nn log file is scanned and rotated.	Using this keyword disables this function.

       If scanlogs is invoked more than once a day, the ``norotate'' keyword should be used to prevent premature log cleaning.

HISTORY

       Written by Landon Curt Noll <chongo@toad.com> and Rich $alz <rsalz@uunet.uu.net> for InterNetNews.  This is revision 1.1, dated 1996/10/29.

SEE ALSO

       innd(8) newslog(5), news.daily(8), nnrpd(8).

																       SCANLOGS(8)
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