Sponsored Content
Full Discussion: question from a dummy
Top Forums UNIX for Dummies Questions & Answers question from a dummy Post 302086794 by tookers on Sunday 27th of August 2006 08:06:46 PM
Old 08-27-2006
Quote:
Originally Posted by cinnamonbear
okay so I just started this unix class and understood all the test questions but this "normal" question threy me through a loop Smilie. The question is Why are UNIX commands noninteractive and why is their output not usually preceededby header information? This question has been driving me insane for an hour now please help Smilie
Hey there,

From my understanding, Unix was developed as a primarily server operating system. Thus programs had to be developed to run non-interactively, as user interactivity may not always be possible. Due to the amount of options and use of piping i guess the use of headers in most unix programs would be useless. For example, if you run dmesg on a system it doesn't print any headers... as there are so many different kinds of hardware and messages displayed, headers would be useless as they wouldn't always be accurate.
Most system administrators create their own scripts to deal with certain output files and mangle them in a way that is infromative and useful to them.

That's a stinker of a question you've got.
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Unix dummy's question

:confused: Hi, 2 questions to get some insight. Thanks (1) I would like to add a prefix (XX00) in each row of the line in my text file and save a newly generated file another name. How to go about it. (2) How to insert a blank line into each row in my file. and save the file another name.... (2 Replies)
Discussion started by: merry susana
2 Replies

2. Filesystems, Disks and Memory

A simple dummy question

Hello Everyone! changing from Microsoft to Macintosh, I connected my hard disk (nearly full) to the apple computer, which could not recognize it. I was prompt to "initialize it", unfortunately I DECIDED YES!!, but just for 1/100 of a second: now I cannot access the hard disk at all. Is still... (1 Reply)
Discussion started by: NETTO68
1 Replies

3. UNIX for Dummies Questions & Answers

cut awk dummy question :)

how to make cut and awk treat "a b" as a single column rather then two separate columns "a and b"? how to remove " symbol from "a b" so there is only a b? Please help Regards Karol (14 Replies)
Discussion started by: sopel39
14 Replies

4. UNIX for Dummies Questions & Answers

Dummy question about /proc/cpuinfo

Perhaps this is a very dummy question but sorry I don't know other place to do it. We just buy a new cluster of Xeon machines but there is something I don't understand and perhaps someone can help me. The more /proc/cpuinfo produces the following output (just part of it). processor : 0... (1 Reply)
Discussion started by: jhc
1 Replies

5. UNIX for Dummies Questions & Answers

a dummy question...needs help...

I am trying to use 'cut' to get a line from my file. But it seems that 'cut' recongnizes TAB as default. My file uses space instead. So 'cut' doesn't work. Anybody can tell me how to change the default from TAB to space ? Or how to transform a space-delimited file into tab-delimited file??... (2 Replies)
Discussion started by: kaixinsjtu
2 Replies

6. UNIX for Dummies Questions & Answers

dummy question on data process

I have a file which contains 6 columns. But I only need the first 3 columns. So I need to remove the last 3 columns. I checked 'cut' but it seems not working. So is there a command that could remove certain columns from a file? :( Thanks a lot!! (5 Replies)
Discussion started by: kaixinsjtu
5 Replies

7. UNIX for Dummies Questions & Answers

a dummy question on data processing

Hi, everyone, I have a matrix, let's say: 1 2 3 4 5 6 ... 4 5 6 7 8 9 ... 7 8 9 1 2 3 ... 3 4 5 6 7 8 ... ......... (nxm matrix) Is there a simple command that can take certain specific rows out of the matrix? e.g., I want to take row 2 (4 5 6 7 8 9 ...) and row 4 (3 4 5 6 7 8... (2 Replies)
Discussion started by: kaixinsjtu
2 Replies

8. IP Networking

DNS dummy question

Hello everyone, I have a some doubt about DNS. We have connected to 2 ISPs /ISP#1 and ISP#2/. Our web site's dns zone is located on ISP#1. If connection to ISP#1 is down clients won't find our website. ISP#1 connection went down few times this month. So we are going to create our website's... (0 Replies)
Discussion started by: sembii
0 Replies

9. UNIX for Dummies Questions & Answers

Dummy question on awk

Hi, I have a file which has three columns and 200 rows. I would like to print an extra column say "disco" for every 10 th row starting from 4 th row. How is that possible? Thnx (4 Replies)
Discussion started by: Indra2011
4 Replies

10. UNIX for Beginners Questions & Answers

Dummy Question

Where can I get UNIX? (1 Reply)
Discussion started by: ciao303
1 Replies
Net::DNS::Question(3)					User Contributed Perl Documentation				     Net::DNS::Question(3)

NAME
Net::DNS::Question - DNS question record SYNOPSIS
use Net::DNS::Question; $question = new Net::DNS::Question('example.com', 'A', 'IN'); DESCRIPTION
A Net::DNS::Question object represents a record in the question section of a DNS packet. METHODS
new $question = new Net::DNS::Question('example.com', 'A', 'IN'); $question = new Net::DNS::Question('example.com'); $question = new Net::DNS::Question('192.0.32.10', 'PTR', 'IN'); $question = new Net::DNS::Question('192.0.32.10'); Creates a question object from the domain, type, and class passed as arguments. One or both type and class arguments may be omitted and will assume the default values shown above. RFC4291 and RFC4632 IP address/prefix notation is supported for queries in both in-addr.arpa and ip6.arpa namespaces. decode $question = decode Net::DNS::Question($data, $offset); ($question, $offset) = decode Net::DNS::Question($data, $offset); Decodes the question record at the specified location within a DNS wire-format packet. The first argument is a reference to the buffer containing the packet data. The second argument is the offset of the start of the question record. Returns a Net::DNS::Question object and the offset of the next location in the packet. An exception is raised if the object cannot be created (e.g., corrupt or insufficient data). encode $data = $question->encode( $offset, $hash ); Returns the Net::DNS::Question in binary format suitable for inclusion in a DNS packet buffer. The optional arguments are the offset within the packet data where the Net::DNS::Question is to be stored and a reference to a hash table used to index compressed names within the packet. qname, zname $qname = $question->qname; $zname = $question->zname; Returns the question name attribute. In dynamic update packets, this attribute is known as zname() and refers to the zone name. qtype, ztype $qtype = $question->qtype; $ztype = $question->ztype; Returns the question type attribute. In dynamic update packets, this attribute is known as ztype() and refers to the zone type. qclass, zclass $qclass = $question->qclass; $zclass = $question->zclass; Returns the question class attribute. In dynamic update packets, this attribute is known as zclass() and refers to the zone class. print $object->print; Prints the record to the standard output. Calls the string() method to get the string representation. string print "string = ", $question->string, " "; Returns a string representation of the question record. COPYRIGHT
Copyright (c)1997-2002 Michael Fuhr. Portions Copyright (c)2002-2004 Chris Reinhardt. Portions Copyright (c)2003,2006-2011 Dick Franks. All rights reserved. This program is free software; you may redistribute it and/or modify it under the same terms as Perl itself. SEE ALSO
perl, Net::DNS, Net::DNS::DomainName, Net::DNS::Packet, RFC 1035 Section 4.1.2 perl v5.16.2 2012-01-27 Net::DNS::Question(3)
All times are GMT -4. The time now is 06:22 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy