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Full Discussion: To extract selected rows
Top Forums Shell Programming and Scripting To extract selected rows Post 302595961 by ctsgnb on Monday 6th of February 2012 05:20:25 AM
Old 02-06-2012
To secure a little the matching :

Code:
sed 's/^/^/' input2.txt | grep -f - Input1.txt

For example if you have a line like :

9653001643,405932410770025,89919321119653001302,1234,4321,34179830,94439735,BF644C4545C9FFB701FB90BE 62DEDC09,01,01,02,8991932111114770025,1128149

This line is not expected since its first fields is not in the list of the wanted fields pointed by input2.txt
but this the sequence of figures 9653001302 appear in the line, the line will still be displayed with the
grep -f Input2.txt Input1.txt command (even if unexpected).


Short demo : we only want line that start with 'to' :
Code:
$ cat filter
to

Code:
$ cat data
toto
tito
tuto
toto

Code:
$ grep -f filter data
toto
tito
tuto
toto

Code:
$ sed 's/^/^/' filter | grep -f - data
toto
toto

Last edited by ctsgnb; 02-06-2012 at 06:34 AM..
 

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LEARN ABOUT HPUX

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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