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Torvalds Perbaiki Bug di Linux Kernel

Jakarta, Seperti diberitakan sebelumnya, sebuah proof of concept virus ditemukan telah menginfeksi dua sistem operasi sekaligus. Dibuat dengan bahasa assembly, virus lintas platform ini menjangkiti PC (personal computer) berbasis Windows dan Linux.

Dijuluki Virus.Linux.Bi./Virus.Win32.Bi., virus ini pertama kali ditemukan oleh vendor keamanan Kaspersky Lab kurang lebih dua minggu lalu, tepatnya 7 April 2006.

Uji coba bug sudah dilakukan di sistem operasi Linux. Terbukti virus ini memang bisa ‘bekerja’ di Linux. Namun, virus ini disinyalir tidak bisa memperbanyak diri di kernel Linux versi terbaru karena adanya bug terkait bagaimana GCC (GNU Compiler Collection) menangani specific registers pada particular system call.

Menanggapi hal ini, pencipta Linux — Linus Torvalds — dengan sigap menambal kernel sistem operasinya. Beberapa developer open source juga sudah melakukan beberapa investigasi dan mencari tau penyebabnya.

Bug tersebut, menurut Torvalds, konon menginfeksi versi Linux yang di-compile dengan kernel tertentu, yang dikenal dengan REGPARM. Torvalds kini sudah menambal masalah itu. Namun, masih menurut Torvalds, patch ini baru bisa dijumpai hingga kernel versi 2.6.17 dirilis.

Bug ‘Benign’

Patch itu dihadirkan untuk memperbaiki apa yang disebut Torvalds dengan bug “benign”. Menurut Torvalds, Virus.Linux.Bi bukanlah sebuah virus. “Ini hanya sebuah program saja. Tidak ada yang salah dengan itu,” ujarnya, seperti dilansir detikINET dari pcworld, Kamis (20/4/2006).

Tapi walau hanya sebuah proof of concept, menurutnya kode itu bisa saja jatuh ke tangan hacker jahat. “Tidak sulit bagi mereka (hacker jahat-red) untuk meng-compile bug itu,” imbuh Torvalds.

Sementara itu, hingga kini, Kaspersky belum menemukan adanya hacker yang mengadopsi kode proof of concept itu untuk disalahgunakan, meskipun peluangnya cukup besar.

“Akan selalu ada black-hatters di luar sana yang mencoba memakai kode itu untuk menciptakan sesuatu yang baru,” papar Shane Coursen, Senior Konsultan Teknik Kaspersky.

“Kemungkinan, akan ada virus lain memakai metode yang sama untuk menginfeksi sistem lintas platform,” tandas Coursen lagi. (dwn)
(dwn)

Add comment April 24th, 2006

Indonesia Juarai Kompetisi Strategi Bisnis Virtual

Paris, Tim dari Indonesia memenangkan kompetisi strategi bisnis virtual pada putaran Final Internasional L’Oreal e-Strat Challenge Episode 6 yang berlangsung di Paris, Prancis. Kompetisi itu diikuti lebih dari 35.000 mahasiswa di seluruh dunia. Oleh wakil kita yang mengikuti kategori Undergraduate (S1), peringkat ketiga pun berhasil disabet!

Adalah Tim Concord dari Fakultas Ekonomi Universitas Indonesia yang memenangkan kompetisi itu. Tim itu beranggotakan tiga orang yakni, Dharma Satriadi, Aan Budiarto dan Arif Medianto.

Mereka bersaing ketat dengan para finalis dari tujuh zona lainnya yang berasal dari sekolah-sekolah bisnis ternama di dunia seperti, London Business School (Inggris), Indiana University atau Kelley School of Business (AS), dan University of Science and Technology of China (Cina).

Kompetisi virtual L’Oreal e-Strat Challenge itu menguji kecepatan berpikir, langkah strategis dan solusi kreatif dalam memecahkan masalah saat bekerja di lingkungan bisnis yang penuh tantangan. Para mahasiswa diajak untuk merasakan duduk di kursi seorang General Manager dari perusahaan kosmetik di dunia maya.

Kompetisi itu terbagi untuk dua kategori, yakni Undergraduate (S1) dan MBA (S2). Namun sayangnya untuk kategori terakhir, tim kita belum berhasil mempersembahkan kemenangan kali ini.

Pada putaran final di Paris, Rabu (12/4/2006), kreativitas dan kemampuan komunikasi merupakan faktor penentu utama, dimana setiap tim mempresentasikan strategi business plan mereka di hadapan panel juri eksekutif. Tiga tim teratas dari masing-masing kategori dipilih berdasarkan Business Plan terbaik dan Share Price Index (SPI) tertinggi.

Panel juri untuk kategori Undergraduate adalah Deputy General Manager Human Resources untuk Grup L’Oreal, Geoff Skingsley; Zone Managing Director Africa-Orient-Pacific L’Oreal, Alain Evrard; Paris Bureau Chief BusinessWeek, Carol Matlack; Senior Vice President The Boston Consulting Group, Jacques Chapuis ; The Alfred H. Heineken Chaired Professor of Marketing INSEAD, Jean-Claude Larreche; serta Managing Director Europe 5 L’Oreal Luxury Division, Valerie Chapoulaud.

Menurut Presiden Direktur L’Oreal Indonesia, Richard Matalon, Mahasiswa Indonesia selama dua tahun terakhir telah membuktikan kemampuan mereka dalam ajang L’Oreal e-Strat Challenge di tingkat internasional melalui keberhasilan mereka menjadi juara I kategori Undergraduate (S1) di 2004 dan sebagai finalis keenambelas besar kategori MBA (S2) di 2005.

“L’Oreal Indonesia akan terus berkomitmen untuk mendorong mahasiswa Indonesia untuk mengenal lebih dekat dunia bisnis yang riil sehinga dapat bermanfaat bagi karir mereka di masa depan, yang mudah-mudahan dapat dirintis bersama L’Oreal,” tulisnya dalam e-mail yang diterima detikINET, Sabtu (22/4/2006).

International Recruitment Director untuk Grup L’Oreal, Jean-Claude Le Grand, mengklaim permainan bisnis L’Oreal e-Strat Challenge sebagai salah satu simulasi strategis paling inovatif, berkelas internasional dan interaktif di dunia korporasi saat ini.

Simulasi itu juga merupakan hasil kerjasama antara L’Oreal dan MSN Microsoft dan telah terbentuk selama 6 tahun. Sejak diluncurkan pada 2000, L’Oreal e-Strat Challenge telah memberikan kesempatan bagi 93.000 mahasiswa di lebih dari 100 negara untuk mengalami bisnis yang nyata dan menguji kemampuan berpikir strategis di antara sesama mahasiswa sedunia.

Simulasi bisnis itu, menurutnya, juga dapat digunakan oleh para dosen sebagai materi bahan kuliah bisnis dan manajemen di kelas. Ini menjadi sinyalemen yang paling kuat dimana dunia akademik menghargai nilai pedagogis suatu permainan bisnis.

Diikuti 1.236 Mahasiswa Indonesia

Tahun ini, lebih dari 35.000 mahasiswa telah mendaftar di seluruh dunia termasuk 412 tim atau 1.236 mahasiswa dari Indonesia. 47 tim atau 141 mahasiswa telah lolos seleksi awal untuk bertanding di tingkat internasional.

Mereka adalah mahasiswa tingkat S1 dan MBA dari berbagai universitas terkemuka seperti, Magister Manajemen UI, Institut Teknologi Bandung, Prasetiya Mulya, Universitas Bina Nusantara, Universitas Gajah Mada dan Universitas Padjadjaran.

Untuk kategori undergraduate (S1), juara pertama adalah dari Maramra University (Turkey). Peringkat kedua diraih tim dari Universite Mc Gill (Canada) dan peringkat ketiga diberikan secara khusus kepada dua tim yaitu, tim dari Universitas Indonesia (FEUI) dan tim dari Tambov State Technical University (Russia).

Sedangkan juara pertama untuk kategori MBA (S2) diberikan kepada tim dari Publitalia 80 (Italy). Peringkat kedua diraih tim dari Instituto Tecnologico Autonomo De Mexico - Itam (Mexico). Sedangkan juara ketiga diraih oleh tim dari Chinese University of Hong Kong (Hong Kong).

Well, selamat bagi Tim Indonesia dan terus berprestrasi! (rou)

(rou)

Add comment April 23rd, 2006

How link popularity can help your search engine rankings

If you have optimized your web page for high search engine rankings and it still doesn’t get better listings, it is very likely that your web site has low link popularity.

Link popularity is a very important factor for all major search engines. If your web site doesn’t have good link popularity, it is very difficult to get good search engine rankings.

Note that link popularity alone is not enough. The content of your web site is also important so that search engines know what your web site is about.

A combination of optimized pages and high link popularity will bring your web site to the top of the search engine results.

What exactly is link popularity?

Link popularity refers to the total number of links that a search engine has found for your web page. The more web sites link to your web page, the higher the link popularity of your page. High link popularity contributes to a high search engine ranking.

The idea behind the link popularity concept is simple. The more other web sites link to your web site, the more important your site must be. Other sites wouldn’t link to your site if there wasn’t something interesting on your site or if your web site didn’t contain any special content.

It’s nearly impossible to manipulate link popularity. Previous ranking algorithms that took META keywords or similar factors into account have been quickly abused to mislead the search engines. On the other side, it’s very difficult to manipulate the number of links that point to a site.

That’s why link popularity is now one of the most important factors for search engines when they rank a web page.

However, you cannot get high link popularity by submitting your web site to thousands of FFA (free for all) link pages. Not all links are considered equal by the search engines. It does matter who links to you and how they link to you.

Not all links are considered equal

The more web sites link to your web site, the higher your link popularity. However, not all links are equal. Some links count more than others. Links from important web sites have a greater effect on your link popularity and your search engine rankings.

A link from www.Yahoo.com to your web site has more weight than a link from a small private web page. A link from a web site with high link popularity is better than a link from an unknown web site.

It’s also important that the web site that’s linking to you has a similar topic as your web site. Imagine that you sell shoes on your web site. A link from another web site that is all about shoes will count much more than a link from a web site that links to all kind of web sites.

Finally, it’s important how the link to your site looks like. For example, one of your important keywords might be “brown leather shoes”.

The link

Brown leather shoes

leads to much better search engine rankings for the keyword “brown leather shoes” than the following link

Smith and Partners

By the way, many people think that they can increase their link popularity by submitting their web site address to FFA (free for all) link pages and link farms (Web sites that link to all kind of web sites). This doesn’t work.

More and more search engines recognize FFA pages and link farms and choose to ignore these pages. Usually, submissions to FFA pages are a waste of time that only results in many spam email messages.

In addition, you should avoid services that promise you 2000 links to your site within a week or so. If they link to you at all, these 2000 links are of poor quality or they don’t have a similar topic as your web site.

Use common sense. Offers that sound too good to be true probably aren’t true.

Summary:

try to get links from important web sites
try to get link texts that contain your important keywords
don’t use FFA or link farm pages
don’t use services that promise lots of links within days
focus on quality links, not on quantity

How to find good potential link partners

As explained above, it’s important who links to your site. web sites that have a similar topic as your site are more important than web sites with different topics.

In addition, if you can convince web sites with a similar topic to link to your site, you’ll also get targeted traffic from these sites.

People who visit your topic partner sites are usually interested in what you have to offer. They are more likely to come to your site and to buy something. It’s the quality of the traffic that counts, not the quantity.

But how do you find good potential links partners? There are several ways:
User IBP’s Link Popularity Improver to find web sites that could trade links with you.

Use ARELIS to find out who links to your competitors and contact these sites to get links from them.

ARELIS is a professional link popularity tool that helps you to find good potential link partners, to manage them, qo quickly build link pages and more. ARELIS also includes very useful tutorials that help you to write effective link exchange email messages that increase your repsonse rate. Give it a try.

Add comment March 14th, 2006

How to rank well with Flash sites

Flash movies are a popular way to make web sites more compelling. They are useful if you want to impress your web site visitors or if you offer web design services.

Unfortunately, if you use Flash movies, or if you even design your complete web site based on the Flash technology, your odds of getting listed in the search engines are greatly reduced.

Search engines can only “see” pure text. They are not able to recognize text on an image or text that appears as a graphic in a Flash movie.

Google advises on its webmaster guidelines page: “If fancy features such as […] Flash keep you from seeing all of your site in a text browser, then search engine spiders may have trouble crawling your site.”.

So how can you achieve high search engine rankings in spite of Flash contents?

First of all, you should re-consider using Flash on your web site. Keep in mind that many visitors still use slow dial-up connections to access web pages. They don’t like to wait 1-2 minutes only to see your company logo fancy animated. Your Flash movies must carry invaluable information to the visitors, otherwise they will be disappointed.

Entry pages that only show your company logo are becoming more and more annoying to users. Using web pages like company brochures only show that your company didn’t get the whole Internet idea.

Keep in mind that not everyone has installed the Flash player. Always add a link to a web page that contains the same important information as found in the Flash movie in plain text.

For these reasons, not using Flash or building a duplicate site without Flash are the easiest ways to make sure that your web site visitors and the search engines can access your web site.

If you really must use Flash on your web site, the following tips can help you getting your Flash contents indexed by the search engines:

Provide links to alternate pages that contain a lot of text and some keywords that the search engines can index.

Place some text above and below your Flash movie that contain your keywords. Along with your title and maybe your meta tags, this gives the search engines some contents to index.

If you embed the Flash movie in your HTML code, use your most important keywords in the movie filename using the HTML tags

and

attribute to include some text that is displayed while the Flash movie is being loaded. In addition, you can use the

attribute to include a keyword-rich movie title.

Use the

Add comment March 14th, 2006

How to choose the right web page title

The title of a web page is one of the most important elements. Good web page titles can remarkably increase the effectiveness of your web site.

The title of a web page is the text that is written between the

and

tag in the HTML code of a web page. If you write the right text between these tags, your web site can get more targeted visitors.

Why are web page titles so important for your web site success?

The titles of your web pages are important for search engines

To many search engine spiders the title of a web page is more important than other web page elements. If your web page title contains your most important keywords, it’s likely that the web page will have a good search engine ranking for these keywords.

The titles of your web pages are important for web surfers

The title of your web site is the first thing web surfers will see from your web site. Many search engines display the title of a web page as the main link to a web site in the search engine result pages.

In addition, the web page title is used when a web surfers bookmarks your web site.
While most search engines don’t allow you to influence the description of your web site, the title of your web site is often listed without any changes.

What does this mean to you?

It’s important that your web pages have compelling titles that are compelling to web surfers and that contain your most important keywords.

For example, if you have a sports shoe shop in London, don’t use this title tag:

Welcome to Smith & Son
People probably won’t click on that link because they don’t know who you are. That web page title doesn’t look very attractive to the average surfer. Better use this title:

Buy sneakers and sports shoes at competitive prices in our shop in London. Nike, Adidas, Reebok and all other major sports shoe brands.
Why is the second title better than the first one?

The second title has many advantages over the first title.

The second title contains keywords that are important for a sports shoe business: sports shoes, sports shoe, sneakers and several brand names.

The inclusion of these words in the title increase the change of good search engine rankings for these keywords.

The second title informs web surfers about the purpose of the web site and it gives them a reason to click: Buy sneakers and sports shoes at competitive prices.

The second title includes geographical information: …in our shop in London. People who live in Chicago are probably not interested in a shop that’s based in London.

The inclusion of “London” in the web page title allows people to quickly find out if it’s worth to visit the web site. In addition, it’s more likely that the web site will be found for a search term such as “shoe shop London”.

Good web page titles can help you to increase your search engine rankings and to get more people to click on your link.

To find the perfect title for high rankings on Google, Yahoo and other major search engines, use IBP’s Top 10 Optimizer.

Add comment March 14th, 2006

How often should you submit your web site?

You’ve probably seen them on the web and you’ve probably received many spam email messages from them: services that promise you to submit your web site to thousands of search engines and that tell you that your web site will get high search engine rankings if you just submit your web site often enough.

The frequency of your search engine submission is not important

When you submit your web site URL to a search engines, you basically ask the search engine spiders to visit your web site and to evaluate it. If the search engine spiders cannot find anything useful on your site, they won’t list your web site. It doesn’t make sense to submit your web site again and again if it isn’t search engine ready.

Search engines must be able to find out what your web site is all about. They need to find text and links on your web pages and they also need to find the keywords for which you want to have high rankings on your web pages.

Submitting alone doesn’t guarantee visitors

Submitting your web site to search engines is important, but it is not the most important step in your search engine marketing campaign.

It’s much more important that your web pages are optimized for search engines. Many web sites are designed in a way that prevents them from showing up in search engines.

If your web pages are not search engine ready, it’s pointless to submit them. If the search engines index your web site at all, it will be listed on position 17,352 or worse. With a listing on that position, you won’t get any visitors.

The key to successful search engine submission

Before submitting your web pages to search engines, you must make sure that they are optimized for your important keywords and for the special search engine you target.

If your web pages are prepared for a special search engine and for a special keyword then it’s much more likely that your web site will receive high rankings.

Make sure that your web pages contain enough text and that search engine spiders can find the pages of your web site trough normal text links. Don’t use web site intros and don’t use too many Flash elements on your web site. It is extra work to optimize your web pages for search engines but it is well worth the effort.

Professional search engine submission takes some time

Don’t fall for services that promise you to submit your web site to thousands of search engines. It will only result in thousands of spam messages. Invest some time in optimizing your web pages before you submit them and then submit your site to important search engines. You’ll get much better search engine rankings

Add comment March 14th, 2006

Can SEO companies guarantee rankings?

Some SEO (search engine optimization) companies guarantee that you get a special search engine position if you let them do the work for you. Actually, this is not possible. No company can guarantee search engine listings.

If a company makes such promises, take a closer look at the guarantee. The catch is often that the company selects the search terms. You’ll be listed for obscure search terms that nobody searches for. If you have a unique company name or a unique product name, it’s relatively easy to get high search engine rankings for that term.

Before paying a company to get high search engine rankings for you, try it yourself with IBP. You’ll find out that you can get high search engine rankings for yourself.

The only way to get high search engine rankings and staying there is good web page content any playing by the rules.

Add comment March 14th, 2006

Frames and search engines

It’s very difficult to get a good rankings on search engines if your web site uses frames.

The problem is that search engines do not index framed web sites well. Actually, the search engines do such a poor job of indexing frames that we recommend rebuilding your web site without them. For some search engines, rebuilding your site without frames is the only way to get a good ranking.

If you must use frames on your Web site for some reason, make sure you use the NoFrames tag so that search engines can find some text to index. The NoFrames tag is a tag specifically for search engines that cannot read the actual pages in your frame set.

Some search engines will be able to index the text you enter in the NoFrames tag. The contents you enter there should be text that is related to your site. It should contain your most important keyword phrases, but should remain readable to your Web site visitors.

You should place the NoFrames tag just before the tag in your frameset, for example:

An easy way to do this is to create a new not framed web page for your site that describes your products and services. Often the content can be taken directly from one of your existing framed pages.

Once you’ve created the new page, view the HTML source of the page and copy everything from within the and tags. Then paste the new content within the and tags found within the NoFrames tags of your frameset.

Note that the text between NoFrames tags in our example contains a link to the main frame set page. That way, Web surfers with older browsers that don’t support frames will also be able to visit the page.

Don’t use a list of keywords within the NoFrames tags and don’t try to overuse this tag because the search engines might penalize your web site for that.

Even if you use the NoFrames tag, it’s still difficult to get a good ranking for a web site that uses frames.

If at all possible, avoid frames on your site.

Add comment March 14th, 2006

Filter words and stop words

Google and other big search engines ignore common words such as ‘the’, ‘of’, ‘where’, as well as certain single digits and single letters. These words are called “filter words”. They are ignored because they tend to slow down a search without improving the results.

Of course, every search engine has its own list of filter words. We’ve found out that the following words seem to be ignored by most search engines:

a, about, an, and, are, as, at, be, by, from, how, i, in, is, it, of, on, or, that, the, this, to, was, we, what, when, where, which, with

What does this mean to your site?

Search engines consider keywords in the title, in the body text and in link texts of a web page as an important ranking criteria.

Be careful when you choose your keywords for the title and the rest of your web page. If your web page title contains a list of filter words you won’t get any results. You might also dilute the effectiveness of your other keywords if you include too many filter words in the title.

Many search engines recommend limiting the number of letters in the title and in the meta tags. If your web page title or the meta tags contain too many filter words, you might reach the character limit before your important keywords begin.

Some words can get you banned on search engines

While filter words might dilute the effectiveness of your other keywords, some words might get your web page banned on search engines. These words are called stop words.

Adult words and phrases that contain sexual content are the most common stop words. However, some search engines build custom stop word lists to penalize web sites that use “keyword stuffing”. Some sites use the same keyword over and over on their pages to get a high rank for that keyword on search engines, even if it is not related to their content.

Of course, search engines try to find those sites and they penalize web pages that use keyword stuffing. Unfortunately, some sites are penalized although their webmasters didn’t try to spam the search engines just because they use a keyword too many times.

That’s why keyword analysis and the right keyword density is very important for a successful web site. If the keyword density is too low, you won’t get a good ranking, if it’s too high, your site might get accused of keyword stuffing.

Summary

Use your most important keywords at the beginning of the title, meta tags, link texts and body text.

Avoid using filter words to increase the effectiveness of your keywords.

Make sure that your web pages have the right keyword density and don’t contain stop words.
The right keyword mix on your web pages will help you to improve your ranking on all important search engines. To find the perfect keyword density for your web site, use IBP’s Top 10 Optimizer.

Add comment March 14th, 2006

Ethical search engine optimization

Some search engine optimization companies and software developers use unethical tricks and techniques to artificially boost the search engine rankings of a web site. This dilutes the quality of search results and the accuracy of search results becomes questionable.

For this reason, the search engines are continuously trying to trace out the spam techniques which webmasters might be using and penalize or ban them.

They continue to reconstruct their algorithms to prevent spammers from flooding the results page with irrelevant or low quality content.

If you use a web site promotion tool that uses these unethical tricks and techniques, you’ll put your web business at severe risk.

Axandra tools use only ethical SEO methods.

Our products use only ethical search engine optimization methods. They use only techniques that produce lasting results and that don’t offend search engines.

Search engines consider the following search engine optimization techniques as SPAM. For that reason, Axandra products DO NOT use or promote them:

automatically generated doorway pages
cloaking and false redirects
keyword stuffing
hidden text or hidden links
pages loaded with irrelevant words
duplicated content on multiple pages
misspelling of well-known web sites
unrelated and centralized link farms
other methods that try to trick search engines
You might get short term results with these techniques but it’s very likely that your site will be banned from search engines if you use one of these techniques. You’ll put your web business at severe risk if you use one of these methods.

Axandra web site promotion tools use only ethical search engine optimization techniques that produce lasting results.

Ethical search engine optimization is about everyone winning

Ethical search engine optimization leads to a symbiotic relationship:

Search engines: They win as they are provided with pages that are easy to understand and that contain the quality information that their visitors search for.

Searchers: They win as they are getting what they ask for from the search engines. They search for “green widgets” and get a page about green widgets.

Web site owners: They win as they are getting quality visitors who are interested in what their web site has to offer.
IBP helps you to build web sites that are beneficial to web surfers, web site owners and search engines.

Add comment March 14th, 2006

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Posts filed under 'Ilmu Komputer'

Torvalds Perbaiki Bug di Linux Kernel

Indonesia Juarai Kompetisi Strategi Bisnis Virtual

How link popularity can help your search engine rankings

How to rank well with Flash sites

How to choose the right web page title

How often should you submit your web site?

Can SEO companies guarantee rankings?

Frames and search engines

Filter words and stop words

Ethical search engine optimization

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