Thanh Luan blog

Making the Most Use of Your Targeted Keywords

Use keyword text, not images for your site’s navigation

This SEO technique gets your primary keywords on every page of your web site. The link leads to the page you are targeting for that keyword or phrase.

In the old days it was common to use image maps with hyperlinked hot spots for website navigation. Image maps are counterproductive when it comes to search engine optimization. It is still common to use images, such as buttons for website navigation. This too, is counterproductive because it doesn’t allow you to take best advantage of your keywords. While you can insert your keywords into the image’s ALT tag, linked text carries greater weight in the algorithms search engines use for rankings.

Search Engines Weigh Your Titles Heavily

Use your keywords in your page titles – What you place between <title> and </title> in the HTML for your web page is critical. Use your keywords, avoid prepositions and conjunctions where possible (the, and, for, with, etc.) and watch your punctuation within the title. Using only dashes between phrases in a title seems to help.

For example, Hand Painted China – Dishes – Mugs. It is not necessary and usually not advisable to waste space in your page’s title tag with your company’s name. If you do, put it at the end of the title – you want your keywords up front.

How You Name Your Website Files Matters for SEO

Use keywords in file names and folders – When you save a file to be posted on your website, use your keywords in the file names.

For example, hand-painted-china.html would be a great filename for a business that sells hand-painted china.

Because you are not prohibited from using the same filename as your competitors, as you would be with your domain name, and because you can do this regardless of whether you use a WYSIWYG editor like Front Page or Dreamweaver without knowing much HTML, this technique is quite easy to implement and make a regular practice.

Don’t leave blank spaces in your filenames. Use an underscore character ( _ ) or hyphen ( – ) instead. I find both equally useful.

Select the Right Domain Name to Improve SEO

Select the right domain name – If you don’t already have a domain name (like www.mydomain.com) or have been considering changing it, selecting the right domain name can be very important. You’ll want your domain to reflect what your business does, and if at all possible include one or more of your targeted keywords.

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Select the Right Keywords for Your Site

Before you can attempt to try to optimize your website for search engines, you need to find the right keywords to target for your site. It is absolutely critical that you not skip this step because the rest of your SEO efforts depend on it.

There are a number of very good free keyword research tools available to help you with this part of your SEO efforts. You can also quickly compare the popularity of up to 5 keywords at once using Google Trends.

Keyword Research is Not Just About Search Volume

The crux of keyword research and selecting the right keywords for your website is not based on search engine volume alone. Search volume must be weighed carefully against the competitiveness of your keywords – the number of sites already ranking for those terms. The balance between high volume and low competition is the ideal selection.

For example, a recent check in WordTracker’s free keyword research tool for the term keywords returned an estimated daily search volume of 1,310 search queries per day, considered to be a strong volume. A search in Google for the term keywords returned 391,000,000 results, which is considered to be extremely competitive (prohibitively so, except for the largest and most authoritative sites). Someone with a smaller site would be better off selecting a lower volume keyword with less competition, rather than focus on an extremely competitive keyword or keyword phrase for which that site has virtually no hope of ranking well.

During the search for keywords, WordTracker’s tool also returned the phrase search engine keywords. While the volume for search engine keywords was only estimated to be 21 searches per day, the number of sites returned in a Google search for search engine keywords was only 704,000, making the term much easier to target for high search engine rankings. Any site would be better off getting 5 visitors per day for the keywords search engine keywords than it would be getting no visitors for the term keyowrds.

Search engine optimization (SEO) is the process of improving the volume or quality of traffic to a web site from search engines via “natural” (”organic” or “algorithmic”) search results. Typically, the earlier a site appears in the search results list, the more visitors it will receive from the search engine. SEO may target different kinds of search, including image search, local search, and industry-specific vertical search engines. This gives a web site web presence.

As an Internet marketing strategy, SEO considers how search engines work and what people search for. Optimizing a website primarily involves editing its content and HTML coding to both increase its relevance to specific keywords and to remove barriers to the indexing activities of search engines.

The acronym “SEO” can also refer to “search engine optimizers,” a term adopted by an industry of consultants who carry out optimization projects on behalf of clients, and by employees who perform SEO services in-house. Search engine optimizers may offer SEO as a stand-alone service or as a part of a broader marketing campaign. Because effective SEO may require changes to the HTML source code of a site, SEO tactics may be incorporated into web site development and design. The term “search engine friendly” may be used to describe web site designs, menus, content management systems and shopping carts that are easy to optimize.

Another class of techniques, known as black hat SEO or Spamdexing, use methods such as link farms and keyword stuffing that degrade both the relevance of search results and the user-experience of search engines. Search engines look for sites that employ these techniques in order to remove them from their indices.

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mkdir – make directories

Usage

mkdir [OPTION] DIRECTORY

Options

Create the DIRECTORY(ies), if they do not already exist.

Mandatory arguments to long options are mandatory for short options too.

-m, mode=MODE  set permission mode (as in chmod), not rwxrwxrwx – umask

-p, parents  no error if existing, make parent directories as needed

-v, verbose  print a message for each created directory

-help display this help and exit

-version output version information and exit

cd – change directories

Use cd to change directories. Type cd followed by the name of a directory to access that directory.Keep in mind that you are always in a directory and can navigate to directories hierarchically above or below.

mv- change the name of a directory

Type mv followed by the current name of a directory and the new name of the directory.

Ex: mv testdir newnamedir

pwd – print working directory

will show you the full path to the directory you are currently in. This is very handy to use, especially when performing some of the other commands on this page

rmdir - Remove an existing directory

rm -r

Removes directories and files within the directories recursively.

chown – change file owner and group

Usage

chown [OPTION] OWNER[:[GROUP]] FILE

chown [OPTION] :GROUP FILE

chown [OPTION] –reference=RFILE FILE

Options

Change the owner and/or group of each FILE to OWNER and/or GROUP. With –reference, change the owner and group of each FILE to those of RFILE.

-c, changes like verbose but report only when a change is made

-dereference affect the referent of each symbolic link, rather than the symbolic link itself

-h, no-dereference affect each symbolic link instead of any referenced file (useful only on systems that can         change the ownership of a symlink)

-from=CURRENT_OWNER:CURRENT_GROUP

change the owner and/or group of each file only if its current owner and/or group match those specified here.  Either  may  be  omitted,  in which case a match is not required for the omitted attribute.

-no-preserve-root do not treat `/’ specially (the default)

-preserve-root fail to operate recursively on `/’

-f, -silent, -quiet  suppress most error messages

-reference=RFILE use RFILE’s owner and group rather than the specifying OWNER:GROUP values

-R, -recursive operate on files and directories recursively

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Khái niệm clustering có nghĩa khác nhau trong các ngữ cảnh khác nhau. Clustering bao gồm có hai hướng chính là:

- Clustering cho tính toán (chẳng hạn Beowulf): kết hợp sử dụng nhiều máy để tǎng sức mạnh tính toán, kiểu này thường được áp dụng cho các công việc đòi hỏi tính toán chuyên sâu. Mô hình clustering này được dùng cho các dự án khoa học trong các lĩnh vực thiên vǎn, hạt cơ bản, mô tả bản đồ gien, y học…
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Các Lệnh Về Khởi Tạo
- rlogin: dùng để điều khiển hoặc thao tác lệnh trên một máy khác.

- exit: thoát khỏi hệ thống (Bourne-Shell).

- logout: thoát khỏi hệ thống C-Shell.

- id: chỉ danh của người sử dụng.

- logname: tên người sử dụng login.

- man: giúp đỡ.

- newgrp: chuyển người sử dụng sang một nhóm mới.

- psswd: thay đổi password của người sử dụng.

- set: xác định các biến môi trường.

- tty: đặt các thông số terminal.

- uname: tên của hệ thống (host).

- who: cho biết những ai đang thâm nhập hệ thống.

* Lệnh Về Trình Báo Màn Hình:
- echo: hiển thị dòng ký tự hay biến.

- setcolor: đặt màu nền và chữ của màn hình.

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