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Top Forums Shell Programming and Scripting cat file1 read line-per-line then grep -A 15 lines down in fileb Post 302280516 by otheus on Tuesday 27th of January 2009 06:47:17 AM
Old 01-27-2009
So you want to find in $FILE each line from $SEARCHFILE, and then get the next 15 lines from $FILE?

Code:
cat $SEARCHFILE | 
while read search; do
   grep -A 15 -F -- "$search" $FILE
done

 

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CAT(1)                                                             User Commands                                                            CAT(1)

NAME
cat - concatenate files and print on the standard output SYNOPSIS
cat [OPTION]... [FILE]... DESCRIPTION
Concatenate FILE(s) to standard output. With no FILE, or when FILE is -, read standard input. -A, --show-all equivalent to -vET -b, --number-nonblank number nonempty output lines, overrides -n -e equivalent to -vE -E, --show-ends display $ at end of each line -n, --number number all output lines -s, --squeeze-blank suppress repeated empty output lines -t equivalent to -vT -T, --show-tabs display TAB characters as ^I -u (ignored) -v, --show-nonprinting use ^ and M- notation, except for LFD and TAB --help display this help and exit --version output version information and exit EXAMPLES
cat f - g Output f's contents, then standard input, then g's contents. cat Copy standard input to standard output. AUTHOR
Written by Torbjorn Granlund and Richard M. Stallman. REPORTING BUGS
GNU coreutils online help: <http://www.gnu.org/software/coreutils/> Report cat translation bugs to <http://translationproject.org/team/> COPYRIGHT
Copyright (C) 2017 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. SEE ALSO
tac(1) Full documentation at: <http://www.gnu.org/software/coreutils/cat> or available locally via: info '(coreutils) cat invocation' GNU coreutils 8.28 January 2018 CAT(1)
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