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Full Discussion: .bash_history
Top Forums UNIX for Advanced & Expert Users .bash_history Post 9995 by Perderabo on Tuesday 6th of November 2001 10:03:16 AM
Old 11-06-2001
History is certainly useless since it's under control of the user. I looked in my bash book at saw:
Quote:
...HISTCONTROL variable. If set to ignorespace, any commands that you type that start with a space won't appear in the history.
And there are many other ways to defeat history including typing "sh" and running a bourne shell for awhile.

I hate to be a party pooper, but accounting is also easily defeated. But why bother? Suppose your accounting records shows that I did:
Code:
vi perderabo.c
cc perderabo.c -o perderabo
./perderabo
rm perderabo.c perderabo

OK, now what did I do?

Some versions of unix have C2 level security features. You can configure them to track every system call invoked by every user. This puts a nasty load of the system though. Short of this, you aren't going to be able to reliably track what users do.
 

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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)
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