Digsby = IM + Email + Social Network in One Aplication

There was a friend who was in Bali to ask, there's not a program for YM's and MSN's and facebook chat in one application.

There is Digsby. although many such applications, among others, Nimbuzz, Ebuddy, etc.. but according to Digsby is the best.

why i recommend Digsby? because there are several advantages digsby it, namely:

1. He immediately connect to the chat server, unlike the others still have to pass its new application server is then forwarded to the chat server. for example if we direct our IM chat connect it to the yahoo server. so rarely have lag in digsby words, unless we wrote a problem connection.

2. Digsby does not just have an IM feature, he is also a feature of his email, so we can not see any new emails in your inbox, similar to Yahoo Messenger so, but here we can put all the email reply, although we have not email yahoo.

3. This cooler in Digsby, here we also have features Social Network, so i see facebook, twetter, etc.. so live look at its features digsby

4. Digsby have different versions, there are versions for Windows, Linux, and Mac.

Try This…!!!

The official site => http://www.digsby.com
Download it => http://www.digsby.com/download.php
Register account => https://accounts.digsby.com/register.php

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Help Commands in Linux

any_command −−help |more
Display a brief help on a command (works with most commands). For example, try cp −−help |more. "−−help" works similar to
DOS "/h" switch. The "more" pipe is needed when the output is longer than one screen.

man topic
Display the contents of the system manual pages (help) on the topic. Press "q" to quit the viewer. Try man man if you need any
advanced options. The command info topic works similar to man topic, yet it may contain more up−to−date information.
Manual pages can be hard to read−−they were written for UNIX programmers. Try any_command −−help for a brief, easier todigest help on a command. Some programs also come with README or other info files−−have a look to the directory
/usr/share/doc. To display manual page from a specific section, I may use something like: man 3 exit (this displays an info
on the command exit from section 3 of the manual pages) or man −a exit (this displays man pages for exit from all sections).
The man sections are: Section 1−User Commands, Section 2−System Calls, Section 3−Subroutines, Section 4−Devices, Section
5−File Formats, Section 6−Games, Section 7−Miscellaneous, Section 8−System Administration, Section 9, Section n−New. To print a
manual page, I use: man topic | col −b | lpr (the option col −b removes any backspace or other characters that could
make the printed manpage difficult to read).

info topic
Display the contents of the info on a particular command. info is a replacement for man pages so it contains the most recent updates
to the system documentation. Use and to move around or you may get confused. Press "q" to quit. A
replacement for the somewhat confusing info browsing system might be pinfo − try if you like it any better.

apropos topic
Give me the list of the commands that have something to do with my topic.

whatis topic
Give me a short list of commands matching my topic. whatis is similar to apropos (see the command above)−−they both use the
same database. But whatis searches keywords, while apropos also searches the descriptions of the keywords.

help command
Display brief info on a bash (shell) built−in command. Using help with no command prints the list of all bash built−in commands.
The shortest list of bash built−in commands would probably include: alias, bg, cd, echo, exit, export, fg,
help, history, jobs, kill, logout, pwd, set, source, ulimit, umask, unalias, unset.

kdehelp
kdehelpcenter
(in X−terminal, two commands, use the one that works on your system). Browse the whole system help using the graphical KDE help
navigator. Normally, KDE help is invoked by pressing the appropriate icon on the KDE control panel. Use gnome−help−browser for the GNOME equivalent.

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Defining a Firewall

A firewall is a piece of software or hardware that filters all network traffic between your computer, home network, or company network and the Internet. It is our position that everyone who uses the Internet needs some kind of firewall protection. This chapter tells you what a firewall does and sets down the basic questions that you should ask as you are evaluating specific firewalls.

Not too long ago, only construction workers and architects asked the question, “Why do we need a firewall?” Before the term firewall was used for a component of a computer network, it described a wall that was designed to contain a fire. A brick and mortar firewall is designed to contain a fire in one part of a building and thus prevent it from spreading to another part of the building. Any fire that may erupt inside a building stops at the firewall and won’t spread to other parts of the building.

A firewall in a computer network performs a role that is very similar to that of a firewall in a building. Just as a firewall made out of concrete protects one part of a building, a firewall in a network ensures that if something bad happens on one side of the firewall, computers on the other side won’t be affected. Unlike a building firewall, which protects against a very specific threat (fire), a network firewall has to protect against many different kinds of threats. You read about these threats in the papers almost every day: viruses, worms, denial-of-service (DoS) attacks, hacking, and break-ins. Attacks with names like SQL Slammer, Code Red, and NIMDA have even appeared on the evening news. Unless you haven’t read a newspaper or watched the news in the last year, you surely have heard at least one of these terms. It’s no secret: they are out there, and they are out to get us. Often we don’t know who they are, but we do know where possible intruders are and where we don’t want them to penetrate. Hackers are roaming the wide expanses of the Internet, just like the outlaws of the Old West roamed the prairies, and we don’t want them to enter our network and roam among the computers in it.

You know that you need to protect your network from these outlaws, and one of the most efficient methods of protecting your network is to install a firewall. By default, any good firewall prevents network traffic from passing between the Internet and your internal network. “Wait a second,” you may be thinking. “I just spent a lot of time, effort, and money to get my network connected to the Internet so that I can send e-mail to business partners, look at my competitor’s Web site, keep up-to-date on sports scores, and check the latest fashion trends. And now you’re telling me that a firewall blocks network traffic. How does this make sense?”

The answer is easy. Keep in mind that separating the Internet from your internal network traffic is the default behavior of most firewalls. However, the first thing that you will probably do after installing the firewall is to change the defaults to allow selected traffic network through the firewall.
This is no different from a building inspector who allows fire doors in a physical firewall. These doors are designed to provide an opening while still guaranteeing safety for all occupants. When you configure a firewall, you create some controlled openings that don’t compromise your network’s safety but that allow selected network traffic to pass through.

As you are designing your protection against attacks from the Internet, never rely on a single form of protection for your network. Doing so can give you a false sense of security. For example, even if you completely disconnect your network from the Internet to prevent a computer virus from entering your network, an employee can still bring to work a floppy disk that has been infected with a virus and inadvertently infect computers in your network.

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