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Top Forums Shell Programming and Scripting How to grep a number in a file to find them in another file Post 302150575 by drl on Tuesday 11th of December 2007 08:51:24 PM
Old 12-11-2007
Hi, Jason.

That is why I asked you to provide the desired results -- to let us see what you need. An example is better than 1000 words, yes?
Code:
#!/usr/bin/env sh

# @(#) s2       Demonstrate a join, with file position added.

set -o nounset
echo

debug=":"
debug="echo"

## Use local command version for the commands in this demonstration.

echo "(Versions displayed with local utility \"version\")"
version >/dev/null 2>&1 && version bash my-nl join

echo
echo " Input files:"
cat data1
echo
cat data2
echo
cat -n data2 >data3
cat data3

echo
echo " Result of join:"
join -1 2 -2 2 data1 data3

exit 0

Code:
% ./s2

(Versions displayed with local utility "version")
GNU bash 2.05b.0
my-nl (local) 296
join (coreutils) 5.2.1

 Input files:
aaa 107
bbb 108
ccc 109

101 2 1
102 3 1
107 2 1
108 3 1
109 2 1

     1  101 2 1
     2  102 3 1
     3  107 2 1
     4  108 3 1
     5  109 2 1

 Result of join:
107 aaa 3 2 1
108 bbb 4 3 1
109 ccc 5 2 1

cheers, drl
 

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echo(1B)					     SunOS/BSD Compatibility Package Commands						  echo(1B)

NAME
echo - echo arguments to standard output SYNOPSIS
/usr/ucb/echo [-n] [argument] DESCRIPTION
echo writes its arguments, separated by BLANKs and terminated by a NEWLINE, to the standard output. echo is useful for producing diagnostics in command files and for sending known data into a pipe, and for displaying the contents of envi- ronment variables. For example, you can use echo to determine how many subdirectories below the root directory (/) is your current directory, as follows: o echo your current-working-directory's full pathname o pipe the output through tr to translate the path's embedded slash-characters into space-characters o pipe that output through wc -w for a count of the names in your path. example% /usr/bin/echo "echo $PWD | tr '/' ' ' | wc -w" See tr(1) and wc(1) for their functionality. The shells csh(1), ksh(1), and sh(1), each have an echo built-in command, which, by default, will have precedence, and will be invoked if the user calls echo without a full pathname. /usr/ucb/echo and csh's echo() have an -n option, but do not understand back-slashed escape characters. sh's echo(), ksh's echo(), and /usr/bin/echo, on the other hand, understand the black-slashed escape characters, and ksh's echo() also understands a as the audible bell character; however, these commands do not have an -n option. OPTIONS
-n Do not add the NEWLINE to the output. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWscpu | +-----------------------------+-----------------------------+ SEE ALSO
csh(1), echo(1), ksh(1), sh(1), tr(1), wc(1), attributes(5) NOTES
The -n option is a transition aid for BSD applications, and may not be supported in future releases. SunOS 5.11 3 Aug 1994 echo(1B)
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