Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: File comparision and modification using shell script
Top Forums UNIX for Dummies Questions & Answers File comparision and modification using shell script Post 302288194 by jim mcnamara on Monday 16th of February 2009 05:02:43 PM
Old 02-16-2009
start with grep, this gives you what appears to be close to what you want
Code:
grep -f filey  filex

this may be closer but it will be slow on big files, it is really inefficient:
Code:
while read recordy
do
      grep -q "$recordy" filex
      if [[ $? -eq 0 ]] ; then
            echo "$recordy"
      else
            echo " "
      fi
done  < filey

 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

File Comparision by using Shell Script

Hello All, I am trying to find 2 file comparision by using Shell Script. For example, I am having 2 directories namely DAY1 & DAY2. DAY1 directory contains file1.dat, file2.dat, file3.dat, file4.dat, file5.dat & DAY2 directory contains file1.dat, file2.dat, file3.dat, file4.dat, file5.dat. Now,... (3 Replies)
Discussion started by: nvkuriseti
3 Replies

2. UNIX for Dummies Questions & Answers

Shell script: last modification date for a file

Hi i have a ques in Shell scripting: ques: accept a filename as a command line argument. Validate the input and display the last modification date for that file. Help pls. (4 Replies)
Discussion started by: onlyc
4 Replies

3. Shell Programming and Scripting

crontab entry modification using shell script

hi Friends, iam trying to write a script which will grep the particular entry in crontab of root and enable/disable it .iam a novice in scripting. your suggestions are most welcome..please help Cheers!! (4 Replies)
Discussion started by: munishdh
4 Replies

4. Shell Programming and Scripting

String comparision in shell scripting

Hi Guys, I am new to scripting I have written a code to compare strings,but I am getting some Exception Code snippet: MODE="D" if ]; then . $file1 fi Error: ./BatchJobs.sh: [[: execute permission denied I have given all Execute permissions to the script(chmod 755... (2 Replies)
Discussion started by: Anji
2 Replies

5. Shell Programming and Scripting

Help with Shell Script Modification

Hi all Iam very new to Shell Scripting, I have to modify a shell script looking at an existing one except that it will query against some table X in A database. Befor Spooling check if there are any reload files if there archive the files. The above scipt executes some abc.sql which will b a new... (2 Replies)
Discussion started by: Varunkv
2 Replies

6. Homework & Coursework Questions

How do I get at the modification date for a file as a variable for a script?

I realize this is basic and probably obvious, but I'm pulling my hair out. I'm guessing this is just some flag on the file command or somesuch, but I can't find it. Help me get unstuck please? EDIT: I guess what I'm asking is once I've got the ls -l output for a file, what command do I use to... (3 Replies)
Discussion started by: Timespike
3 Replies

7. Shell Programming and Scripting

Modification in shell script

Hello Team, I have prepared script which will check for listening message for ports 1199,1200 and 1201. I need modifcation in script in such a way that if port 1200 is not listening then it should message rmi port 1200 is not listening. Smap for port 1199 and 1201. kindly guide me to acheive... (4 Replies)
Discussion started by: coolguyamy
4 Replies

8. Shell Programming and Scripting

Needed shell script to read txt file and do some modification

Hi ...programmers... I need a shell script to perform some specific task.. my txt file looks like this netcdf new { dimensions: XAX1_11 = 11 ; variables: double XAX1_11(XAX1_11) ; XAX1_11:point_spacing = "even" ; XAX1_11:axis = "X" ; float DEPTH(XAX1_11) ;... (19 Replies)
Discussion started by: Akshay Hegde
19 Replies

9. Shell Programming and Scripting

Shell backup script modification

so I'm using this shell script someone made to backup data on a server in an archive (gpg encrypted) and upload to an FTP (meant to be run as a cron job daily). can one of the experts here confirm if the script is fine? It is meant to backup the folder /opt and the sql data i want to know how I... (9 Replies)
Discussion started by: galapagos8000
9 Replies

10. Shell Programming and Scripting

Modification of perl script to split a large file into chunks of 5000 chracters

I have a perl script which splits a large file into chunks.The script is given below use strict; use warnings; open (FH, "<monolingual.txt") or die "Could not open source file. $!"; my $i = 0; while (1) { my $chunk; print "process part $i\n"; open(OUT, ">part$i.log") or die "Could... (4 Replies)
Discussion started by: gimley
4 Replies

LEARN ABOUT PLAN9

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)
All times are GMT -4. The time now is 02:39 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy