Tags: Bengali Post / Tutorials / Web Development

HTML Color Codes

- Wednesday, 5 November 2014 2 Comments

FFF  FFF

CCC  CCC

999  999

666  666

333  333

000  000

FFC  C00

FF9  900

FF6  600

FF3  300

99C  C00

CC9  900

FFC  C33

FFC  C66

FF9  966

FF6  633

CC3  300

CC0  033

CCF  F00

CCF  F33

333  300

666  600

999  900

CCC  C00

FFF  F00

CC9  933

CC6  633

330  000

660  000

990  000

CC0  000

FF0  000

FF3  366

FF0  033

99F  F00

CCF  F66

99C  C33

666  633

999  933

CCC  C33

FFF  F33

996  600

993  300

663  333

993  333

CC3  333

FF3  333

CC3  366

FF6  699

FF0  066

66F  F00

99F  F66

66C  C33

669  900

999  966

CCC  C66

FFF  F66

996  633

663  300

996  666

CC6  666

FF6  666

990  033

CC3  399

FF6  6CC

FF0  099

33F  F00

66F  F33

339  900

66C  C00

99F  F33

CCC  C99

FFF  F99

CC9  966

CC6  600

CC9  999

FF9  999

FF3  399

CC0  066

990  066

FF3  3CC

FF0  0CC

00C  C00

33C  C00

336  600

669  933

99C  C66

CCF  F99

FFF  FCC

FFC  C99

FF9  933

FFC  CCC

FF9  9CC

CC6  699

993  366

660  033

CC0  099

330  033

33C  C33

66C  C66

00F  F00

33F  F33

66F  F66

99F  F99

CCF  FCC

CC9  9CC

996  699

993  399

990  099

663  366

660  066

006  600

336  633

009  900

339  933

669  966

99C  C99

FFC  CFF

FF9  9FF

FF6  6FF

FF3  3FF

FF0  0FF

CC6  6CC

CC3  3CC

003  300

00C  C33

006  633

339  966

66C  C99

99F  FCC

CCF  FFF

339  9FF

99C  CFF

CCC  CFF

CC9  9FF

996  6CC

663  399

330  066

990  0CC

CC0  0CC

00F  F33

33F  F66

009  933

00C  C66

33F  F99

99F  FFF

99C  CCC

006  6CC

669  9CC

999  9FF

999  9CC

993  3FF

660  0CC

660  099

CC3  3FF

CC0  0FF

00F  F66

66F  F99

33C  C66

009  966

66F  FFF

66C  CCC

669  999

003  366

336  699

666  6FF

666  6CC

666  699

330  099

993  3CC

CC6  6FF

990  0FF

00F  F99

66F  FCC

33C  C99

33F  FFF

33C  CCC

339  999

336  666

006  699

003  399

333  3FF

333  3CC

333  399

333  366

663  3CC

996  6FF

660  0FF

00F  FCC

33F  FCC

00F  FFF

00C  CCC

009  999

006  666

003  333

339  9CC

336  6CC

000  0FF

000  0CC

000  099

000  066

000  033

663  3FF

330  0FF

00C  C99

009  9CC

33C  CFF

66C  CFF

669  9FF

336  6FF

003  3CC

330  0CC

00C  CFF

009  9FF

006  6FF

003  3FF

Tags: Tutorials

Difference Between HTTP and HTTPS

- 1 Comment

Hypertext Transfer Protocol (HTTP) is a protocol used in networking. When you type any web address in your web browser, your browser acts as a client, and the computer having the requested information acts as a server. When client requests for any information from the server, it uses HTTP protocol to do so. The server responds back to the client after the request completes. The response comes in the form of web page which you see just after typing the web address and press “Enter”.

Hypertext Transfer Protocol Secure (HTTPS) is a combination of two different protocols. It is more secure way to access the web. It is combination of Hypertext Transfer Protocol (HTTPS) and SSL/TLS protocol. It is more secure way to sending request to server from a client, also the communication is purely encrypted which means no one can know what you are looking for. This kind of communication is used for accessing those websites where security is required. Banking websites, payment gateway, emails (Gmail offers HTTPS by default in Chrome browser), and corporate sector websites are some great examples where HTTPS protocols are used.

For HTTPS connection, public key trusted and signed certificate is required for the server. These certificate comes either free or it costs few dollars depends on the signing authority. There is one other method for distributing certificates. Site admin creates certificates and loads in the browser of users. Now when user requests information to the web server, his identity can be verified easily.

Here are some major differences between HTTP and HTTPS:

HTTP	HTTPS
URL begins with “http://”	URL begins with “https://”
It uses port 80 for communication	It uses port 443 for communication
Unsecured	Secured
Operates at Application Layer	Operates at Transport Layer
No encryption	Encryption is present
No certificates required	Certificates required

Tags: Tutorials

Trojan horse Virus

- Tuesday, 4 November 2014 No Comments

What is Trojan horse? Everybody says it is the myth in famous Greek history. It was an interesting and useful thing. There are so many warriors in the base of the Trojan horse.Trojan horse virus also like that myth seems like very useful software. But when it installed once in your computer it will destroy contains of the computer.Trojan virus seems like legal software so do not install in to that Trojan horse software virus in to the computer.

It can identify in the internet given as free screensaver, interesting games like wise. Once this virus installed into the computer it will destroy your files, passwords useful documents etc..Also it can hack the computer. So this is how Trojan horse virus played in the computers. Do not install in to the computer.


















Features of Trojan horse virus

The main difference amid a normal computer virus and a Trojan horse is that it is not specifically developed for spreading themselves. In its place Trojan horse virus is downloaded either as an infected file from internet, or as payload of some other virus. This virus is capable of stealing end-user information and downloading other malware to a computer too. To fight with this treacherous virus, your computer is equipped with firewall and you can also install antivirus software in your system. However, an antivirus is not always effective against Trojan horse, so at that instance the way out of the problem is to remove Trojan horse virus manually.

Steps you have to follow for manual removal
There are some simple steps, which you can follow to remove Trojan horse virus manually. These include:

• Recognize the Trojan: After recognizing a file infected with Trojan horse, it becomes easy to remove it. Usually, your system will give you DLL error, which is associated with Trojan attack. You can copy the error and find out about the affected exe file online.
• Stop the function of system restore: If you forget this step, then it will restore the files you will delete.
• Restart you computer: When you restart, press F8 and then select safe mode to start your computer.
• Go to Add or Remove Programs: You will find this in the control panel, and then remove the programs affected with Trojan horse.
• Remove extensions: To delete all files of a program, you should remove them from Windows System folder.

Once you have done the following steps, you should restart your system in normal mode this time.
Other ways of removing the virus

Another way of removing Trojan horse manually include steps such as:

• Display the hidden folders from the folder options
• Then restart the system in safe mode
• Then stop the processes that are associated with Trojan virus.
• However, to complete these steps, you will have to edit your system’s registry.

Points to remember
For moving the infected files from your registry, you will have to find the file in your RUN folder. Further, when you find the folder you will have to delete the dlls and exe files related to the Trojan names and then finally delete the value. You should also check the Startups and see what programs are loaded automatically when you start your system. This is method is good for those, who have some knowledge about editing the registry. Otherwise, you will have to use an advanced program for removing the Trojan horse virus from your system.

Tags: Tutorials

Make your online storages as a network drive in My Computer

- No Comments

Most of people are using online storages. Recently introduced Google Drive, most famous Dropbox, Microsoft’s SkyDrive, Picasa for exchange photos, they are the most famous and reliable online storages in the world. People are using more than one online storage. But there is a problem that we can’t use them at a same place and at a same time. As an example SkyDrive and Google Drive are using two different methods. If you forgot your file in which online storage it would be bit difficult to search. But when you use our method you can store your online storage's as a network drive in My computer. Then you can use your online storage's as an ordinary hard drive.

First of all you have to log into otixo.com using following link and make an account in that. You can have 2GB space bandwidth for a free account.

Sign up with otixo.com

After done that you have to confirm your email address and you can log into otixo.com. Then you can see the following page.

You can use online storages that in the right hand side. If we use dropbox click on the dropbox icon. Next type a name to identify dropbox and click on Authorize via Dropbox. 




Then click on the allow button.



Now you can see your dropbox folder that added into otixo.com



Click on ‘+’ sign that pointed by an arrow, you can add your other online storage to otixo.com like we done before.

Now we finish our work in otixo.com. Then we have to save our online storages in otixo.com as a network drive. For that, open my computer window and click on map network drive tab.

After that we can see another window. In that window type as https://dav.otixo.com in the folder position like above picture and click on finish button.

Then we have to input our email account and the password that we input in otixo.com and click on ok button

After a few minutes we can see a new icon on the my computer window.

When we open it we can see our folders those we made in otixo.com. Now we can use them as normal folders. We can copy files from folders, paste files into our folders. But the copying speed will depend on your internet speed.

If you want to remove your network drive you have to right click on the network drive and disconnect it.

Tags: Tutorials

What are Cookies?

- Monday, 3 November 2014 No Comments

Do you often surf in the internet then you definitely heard about cookies. When we are going into websites they are making cookies in our computer. Most times they made for memorized user preferences of our computers. Let’s see how it happened.

Once we entered to a website we logged into their server. Then the server search that we are having previous cookies in our computer. If there are some cookies then the server would know about those cookies. Therefore the server can upload the website as our preferences. If there are not cookies then the server would make a new cookie and put new data into it. There is not want our permission to do that procedure. So how can we know about the cookies those we don’t know in our hard drive?

If we are using Google chrome there would be in Google chrome options and there is a option called under the hood and there is a tab called show cookies. When we click it we can see our cookies. If we are using Mozilla Firefox it would be under options tab called privacy then we can see cookies.

There are some rumors out in the society that there are some viruses are coming with cookies. It is completely wrong. But there is something to fear about cookies because in cookies they know about us and know what we are doing. Those things are known by the server. What happened if they give those in formations to others? In advertising firm those information are very important for them. It is harm for their privacy when that information went out. There is an advantage for website from cookies; it is we can see how many visitors that logged into the website. Once we made a new cookie that means a new visitor.