01-06-2008
a begginers question
hey
i'm very much new to unix
i'm trying to write a script which goes through given files and checks if the files begin with # and if they are executable
my problem is that when i try to check the result of my query i'm getting nada
let me explain :
when i write
if (`file $i | grep 'executable' `=~ ?*)
or
if (`head -1 $i | grep '^#' ` != ``)
i'm getting weird results
i'm guessing my sintax is way off here...
any suggestions on the proper syntax for checking if the return value of this query isn't NULL...?
thanks in advance
9 More Discussions You Might Find Interesting
1. UNIX for Dummies Questions & Answers
what is the function of swap in linux why i have to create apsolutely a particion for the swap when i install (i installed lnx4win mandrake and made an automat. disk particion and the install program one of my disk partitions that was 3gb devidet in 4 one native 700mb swap 600mb and the others i... (1 Reply)
Discussion started by: user666
1 Replies
2. UNIX for Dummies Questions & Answers
hi im a unix system beginner
i would like to write a script that will run as follows
1 it will read all process including what they are doing
2 it will list all the processes that were idle or not consuming space in the VMSTAT command like in the cpu or memory coloum so i can kill those... (4 Replies)
Discussion started by: jao_madn
4 Replies
3. Shell Programming and Scripting
how do i write a script that'll open what i entered and scan it for a certain line of text.
for example, i enter a filename (that exists) and in that file i want to scan a certain word that'll show how much of that word appears throughout the file. (2 Replies)
Discussion started by: mrhenry
2 Replies
4. UNIX for Dummies Questions & Answers
I need to write a script file that will tell me the largest number in a group of numbers. ANy help is greatly appreciated (2 Replies)
Discussion started by: twan
2 Replies
5. UNIX for Dummies Questions & Answers
Hi Guys
I have a quick question
I have a file that is approx 1.5 million lines long of which most of the lines start with
INFO: some info
INFO: some more info
INFO: etc
I want to remove these lines
I was thinking along the lines of
:%s/INFO*//g
but this does not work
None... (6 Replies)
Discussion started by: grahambo2005
6 Replies
6. UNIX for Dummies Questions & Answers
1. How the Unix system identify the Other User to access for file permission?
2. What command we use to convert the extension of a file name?
3. What command use to convert other editing file to Unix based text file?
Please answer of these Question???Its necessary for me?? (3 Replies)
Discussion started by: pradipta_pks
3 Replies
7. Programming
Hi,
I am doing a C++ self-study and I got stuck with this problem.
I want to have a code that asks the suer to enter two numbers and then it lists the numbers between these two numbers. It has also to print a message if these two numbers are equal.
Here is what I wrote:
#include <iostream>... (11 Replies)
Discussion started by: faizlo
11 Replies
8. Shell Programming and Scripting
Hi,
I'm new to unix and got struck here.Can any one help me out.My question is ..
is the command
if ;
then
echo "do some stuff"
fi
correct?
Thanks in advance
abhijeet (18 Replies)
Discussion started by: Abhijeet_Atti
18 Replies
9. UNIX for Dummies Questions & Answers
Hi,
When doing ls -l, is it right to assume that all files with the date and time on it are files that are created/modified on the current year?
Is there any way to display the creation/modified date of a file that are not created/modified in the current year? (4 Replies)
Discussion started by: newbie_01
4 Replies
LEARN ABOUT REDHAT
net::dns::question
Net::DNS::Question(3) User Contributed Perl Documentation Net::DNS::Question(3)
NAME
Net::DNS::Question - DNS question class
SYNOPSIS
"use Net::DNS::Question"
DESCRIPTION
A "Net::DNS::Question" object represents a record in the question section of a DNS packet.
METHODS
new
$question = Net::DNS::Question->new("example.com", "MX", "IN");
Creates a question object from the domain, type, and class passed as arguments.
qname, zname
print "qname = ", $question->qname, "
";
print "zname = ", $question->zname, "
";
Returns the domain name. In dynamic update packets, this field is known as "zname" and refers to the zone name.
qtype, ztype
print "qtype = ", $question->qtype, "
";
print "ztype = ", $question->ztype, "
";
Returns the record type. In dymamic update packets, this field is known as "ztype" and refers to the zone type (must be SOA).
qclass, zclass
print "qclass = ", $question->qclass, "
";
print "zclass = ", $question->zclass, "
";
Returns the record class. In dynamic update packets, this field is known as "zclass" and refers to the zone's class.
print
$question->print;
Prints the question record on the standard output.
string
print $qr->string, "
";
Returns a string representation of the question record.
data
$qdata = $question->data($packet, $offset);
Returns the question record in binary format suitable for inclusion in a DNS packet.
Arguments are a "Net::DNS::Packet" object and the offset within that packet's data where the "Net::DNS::Question" record is to be stored.
This information is necessary for using compressed domain names.
COPYRIGHT
Copyright (c) 1997-2002 Michael Fuhr. All rights reserved. This program is free software; you can redistribute it and/or modify it under
the same terms as Perl itself.
SEE ALSO
perl(1), Net::DNS, Net::DNS::Resolver, Net::DNS::Packet, Net::DNS::Update, Net::DNS::Header, Net::DNS::RR, RFC 1035 Section 4.1.2
perl v5.8.0 2002-10-12 Net::DNS::Question(3)