#!/usr/bin/perl
use warnings;
use strict;
my %file2;
open (FILE2, '<' , 'path/to/file2') or die "$!";
while(<FILE2>){
$file2{(split(/\s+/))[0]}=1;
}
close FILE2;
open (FILE1, '<' , 'path/to/file1') or die "$!";
open (OUT, '>' , 'path/to/outputfile') or die "$!";
while(<FILE1>){
chomp;
if (exists $file2{$_}) {
print OUT "$_\n";
}
}
close FILE1;
close OUT;
I have a fix_table.ksh script that takes a TABLENAME and a date.
So, in jk_table_file.txt I have the tables...one per line, and
in jk_out_file.txt I have the date in the format I need.
The following doesn not 'want' to work in a shell script...
for TABLE in `cat jk_table_file.txt`; do
... (2 Replies)
Hi,
I am new to shell programming, and hve been given a request to write a shell script.
Is there any good places to go to see examples of how to write shell programming scripts?
Thanks (4 Replies)
For what purposes should we use shell
/what are the tasks we can achieve using shell
which is best book to learn shell programming
and will nayone tell me diff between shell programming aand shell scripting?
Thank u in advance. (1 Reply)
Could someone please tell me what {} mean when they surround a variable?
For instance,
$FILE = 'basename $1' //what is passed into this script
$BANK = 'dirname $1'
$INFILE = ${FILE}.${BANK}.$$
What does $INFILE contain after this assignment?
Please let me know
Thanks
G (4 Replies)
Hi,
Iam new to shell program,
I want to check a file which is having same lines 2 times and i want to display it in a seperate file.
File format is :
AQWERTYU|1234567890
ASDFGHJK|0987654321
ZXCVBNML|1098576453
AQWERTYU|1234567890
I need to take the 1st and 4th lines in the above... (5 Replies)
Using shell scripting, implement ‘scan.sh' that scans the file system recursively starting
from current working directory and generates the file ‘index.txt' that contains a line for each
file (or directory) with following fields in tab separated format:
1. The full path of the directory... (1 Reply)
Hi,
I am using two files - one file contains list of service name , other file contains commands for each of these service name .
I have to read each service name and check this string in 1.cfg file , if it exists , then i have to read another file (commands file ) and take the string and... (2 Replies)
Discussion started by: santhoshks
2 Replies
LEARN ABOUT CENTOS
comm
COMM(1) User Commands COMM(1)NAME
comm - compare two sorted files line by line
SYNOPSIS
comm [OPTION]... FILE1 FILE2
DESCRIPTION
Compare sorted files FILE1 and FILE2 line by line.
With no options, produce three-column output. Column one contains lines unique to FILE1, column two contains lines unique to FILE2, and
column three contains lines common to both files.
-1 suppress column 1 (lines unique to FILE1)
-2 suppress column 2 (lines unique to FILE2)
-3 suppress column 3 (lines that appear in both files)
--check-order
check that the input is correctly sorted, even if all input lines are pairable
--nocheck-order
do not check that the input is correctly sorted
--output-delimiter=STR
separate columns with STR
--help display this help and exit
--version
output version information and exit
Note, comparisons honor the rules specified by 'LC_COLLATE'.
EXAMPLES
comm -12 file1 file2
Print only lines present in both file1 and file2.
comm -3 file1 file2
Print lines in file1 not in file2, and vice versa.
GNU coreutils online help: <http://www.gnu.org/software/coreutils/> Report comm translation bugs to <http://translationproject.org/team/>
AUTHOR
Written by Richard M. Stallman and David MacKenzie.
COPYRIGHT
Copyright (C) 2013 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 join(1), uniq(1)
The full documentation for comm is maintained as a Texinfo manual. If the info and comm programs are properly installed at your site, the
command
info coreutils 'comm invocation'
should give you access to the complete manual.
GNU coreutils 8.22 June 2014 COMM(1)