Archive for the software category.
The chkrootkit product is a prototypical filesystem scanning tool. The tools were primarily written by Nelson Murilo and Klaus Steding-Jessen and are loosely based on ideas from William Stearns’ tools to detect and find worms on compromised hosts. These tools are based on the same principles of looking through the system for file names and processes that have been associated with worms and viruses.
The chkrootkit tool is designed for Linux and UNIX systems, not Windows systems, and designed to be cross platform. While it would be possible to write a tool such as this for Windows systems, the difficulty comes in maintaining an up-to-date list of malicious filenames and patterns. For this reason, commercial malware detection tools are preferred. The tool is not one program but actually a suite of programs:
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The relation between computer and health are quite close actually. Between both of them some benefit and loss we could see. The positive impact we already know, the growth of information technology have been impacting on how fast the information getting through and keep patient controllable and eventually saving their lives.
While the negative impact of using computer is obviously in eye. Working in front of computer would make your eyes tired. However currently many tools we could use to reduce the radiation.
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When we’re talking about communication, there are two cross on my mind. Which are skills and technology. Both of them are tied together, and if you took advantage and maximize both of them then no doubt, that you could influence others.
Communication skills require experience and further knowledge, while technology requires facilities. With technologies, communication would be more interesting. Back at those days, communication only related to telephone, telegraph, and other communication instrument, but these days, are moving more rapidly.
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Corrupted File, who doesn’t hate thing thing especially when you’re in a middle of important thing to do such as presenting products in front of your boss or selling something in front of your customers.
Not to mention if the file couldn’t be restore in a few minutes. What a headache. For some people in the middle of pressure, they could accidentally delete the files. That really made a big deal for you. But how to solve it out? lets find out more below.
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Multiuser systems, typically found on server systems, usually have the rights and authorized actions for users partitioned into groups. One group may be able to read most of the system, for example, but not modify system files. Another may be able to read sensitive files but not modify them. A superuser group, in contrast, has total access to the system and is able to read or write to arbitrary files and directories. In UNIX, this account is typically called “root” and has an ID of 0. In Windows NT, 2000, and XP, this is the “Administrator” account.
One of the reasons a worm such as Code Red or Nimda was able to do as much damage to systems as it did was the privilege level gained by the malicious worm. The server software that was attacked ran with system-level rights, meaning any actions it made were executed with elevated rights as well. When an attacker strikes the server and executes arbitrary commands, they are done in the context of the compromised application.
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Host-based firewalls are a complement to a network-based firewall. While most systems do not run host-based firewalls, instead relying on the network’s firewall to provide them with protection, at the host level more fine-grained control can be applied. This method also acts as a fail over protection for the network-based firewall should any attack bypass that mechanism. These situations can include the penetration of a worm behind the perimeter firewall or a difference between the policy enforced by the perimeter defenses and those required by the host.
There are several example situations where host-based firewalls may be an appropriate solution to defending a set of hosts. These include situations where the default network security policy is absent but the security requirements for the host are more demanding.
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The evolution of software broadly classified into the era of the lack of computer and after the introduction of computers. Before the computer era is divided into primitive and mechanical era. Whereas in the era after the introduction of computers, software evolution follows the evolution of the computer hardware itself.
The era before the introduction of computer software are classified into two eras, namely:
1. Primitive era (± 300 BC) on which the software is made by performing simple instructions by using code similar motion semaphore.
2. Mechanical Era (1840-1930’s) that apply to the use of equipment and machinery Analytical Engine punch cards.
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