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DOMAINS

01. How to get a cheap domain name?

There are lots of places to buy cheap domain names. And while most of the vendors are reputable, there are some key points to keep in mind when deciding who you want to register your domain with. You can check out some of our recommend cheapest domain registrars here.

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02. How to get a .com domain?

If you have a web site, you should seriously consider registering your own domain name. A domain name is a name like "thesitewizard.com" or "thefreecountry.com", which you can use to refer to your website. We are affiliated with lots of domain registrar so we can help you to get .com domain.

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03. Do I need a .com domain?

Yes it is very important to have a .com domain . If you have a web site, you should seriously consider registering your own domain name. A domain name is a name like "thesitewizard.com" or "thefreecountry.com", which you can use to refer to your website. We are affiliated with lots of domain registrar so we can help you to get .com domain.

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04. Pay Per Impression (CPM)

Here, you are paid according to the number of times the advertiser's banner is displayed on your site. The amount you earn is typically calculated based on the number of thousand impressions of the banner (impressions = number of times the banner is displayed), often abbreviated CPM (cost per thousand, with the M being the Latin numeral for thousand). That is, $5 CPM means that you get paid $5 for 1,000 displays of the banner. In general, the amount paid is usually small, but it is easy to earn since everytime a visitor loads the page, you earn. This is known as a "high conversion rate". Needless to say, this method will allow you to automatically earn more if your site attracts a lot of visitors.

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05. Pay Per Click (PPC)

When you are paid per click, you are only paid when visitors click the advertiser's banner on your site. The amount paid is usually higher than the pay per impression scheme. Whether you get a high conversion rate here depends on the banner (whether it attracts people to click it), although in general, it has a higher conversion rate than the pay per sale method. A high traffic site will probably enjoy a higher click rate than a lower traffic site, although you will probably get better results if your banners are carefully selected to suit the target audience of your site.

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06. Pay Per Sale or Lead (sometimes referred to as Cost Per Action, or CPA)

While you will probably get the highest payment rates with this method, it has the lowest conversion rate of the three schemes. You will only earn if your visitors click through the banner and either purchase an item from the advertiser or take some other prescribed action (eg, sign up for a service). Like the Pay Per Click method, you get much better results if you carefully select your advertisers to suit the target audience of your site.

In general, to avoid wasting resources in issuing cheques for very small amounts, advertisers will usually accrue the amount owing to you until it reaches a certain level (such as $25) before they pay you.

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HOSTING 

01. Reliability and speed of access

Not only should the web host be reliable and fast, it should guarantee its uptime (the time when it is functional). Look for a minimum uptime of 99%. In fact, even 99% is actually too low — it really should be 99.5% or higher. The host should provide some sort of refund (eg prorated refund or discount) if it falls below that figure. Note though that guarantees are often hard to enforce from your end — especially if the host denies there was any downtime. However, without that guarantee, the web host will have little incentive to ensure that its servers are running all the time.

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02. Data Transfer (Traffic/Bandwidth)

Data transfer (sometimes loosely referred to as "traffic" or "bandwidth") is the amount of bytes transferred from your site to visitors when they browse your site.

Don't believe any commercial web host that advertises "unlimited bandwidth". The host has to pay for the bandwidth, and if you consume a lot of it, they will not silently bear your costs. Many high bandwidth websites have found this out the hard way when they suddenly receive an exorbitant bill for having "exceeded" the "unlimited bandwidth". Always look for details on how much traffic the package allows. I personally always stay clear of any host that advertises "unlimited transfer", even if the exact amount is specified somewhere else (sometimes buried in their policy statements). Usually you will find that they redefine "unlimited" to be limited in some way.

In addition, while bandwidth provided is something you should always check, do not be unduly swayed by promises of incredibly huge amounts of bandwidth. Chances are that your website will never be able to use that amount because it will hit other limits, namely resource limits. For more details, see the article The Fine Print in Web Hosting: Resource Usage Limits.

To give you a rough idea of the typical traffic requirements of a website, most new sites that don't provide video or music on their site use less than 3 GB of bandwidth per month. Your traffic requirements will grow over time, as your site becomes more well-known, so you will need to also check their policy when you exceed your data transfer limit: is there a published charge per GB over the allowed bandwidth? Is the charge made according to actual usage or are you expected to pre-pay for a potential overage? It is better not to go for hosts that expect you to prepay for overages, since it is very hard to forsee when your site will exceed its bandwidth and by how much.

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03. Disk space

For the same reason as bandwidth, watch out also for those "unlimited disk space" schemes. Many new sites (that don't host videos or music) need less than 20 MB of web space, so even if you are provided with a host that tempts you with 100 GB (or "unlimited space"), be aware that you are unlikely to use that space, so don't let the 100 GB space be too big a factor in your consideration when comparing with other web hosts. The hosting company is also aware of that, which is why they feel free to offer you that as a means of enticing you to host there. As a rough gauge, thesitewizard.com, with nearly 400 pages in April 2013, used only about 18 MB for all its pages and associated files.

04. Technical support

Does its technical support function 24 hours a day, 7 days a week (often abbreviated 24/7), all year around? Note that I will not accept a host which does not have staff working on weekends or public holidays. You will be surprised at how often things go wrong at the most inconvenient of times. Incidentally, just because a host advertises that it has 24/7 support does not necessarily mean that it really has that kind of support. Test them out by emailing at midnight and on Saturday nights, Sunday mornings, etc. Check out how long they take to respond. Besides speed of responses, check to see if they are technically competent. You wouldn't want to sign up with a host that is run by a bunch of salesmen who only know how to sell and not fix problems.

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WEB SERVERS

01. What are the versions of Apache, MySQL and PHP in Web Server Cloud?

Please refer to the detail configuration of web server cloud in http://www.its.hku.hk/services/data-centre/system/webcloud.

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02. How to upload files to web server cloud?

Please refer to the procedure in http://www.its.hku.hk/documentation/guide/infosys/web/ssh to setup SFTP for file transfer.

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03. How to change host account password in Web Server Cloud?

After connecting to the web server cloud using SSH, you can use the UNIX command "passwd" to change password.

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04. How to change password of MySQL account?

You can change the password of MySQL account using one of the following ways:

(a) connect to your MySQL account at 'localhost':

step 1a: start up MySQL:
mysql -u -p

step 2a: change your MySQL account password at 'localhost':
MySQL> set password for <mysql_accountname>=password('newpassword');

step 3a: disconnect from MySQL:
MySQL> quit;

(b) connect from another system from HKU network to the computer 'www.<domainname>.hku.hk (mysql access is available from HKU network only):

step 1b: start up MySQL:
mysql -u <mysql_accountname> -p -h www.<domainname>.hku.hk

step 2b: change your MySQL account password at 'www.<domainname>.hku.hk' :
MySQL> set password for <mysql_accountname>=password('newpassword');

step 3b : disconnect from MySQL :
MySQL> quit;

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05. Do I need Apache to run a website?

Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged.

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06. Should I get Apache web hosting?

Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged.

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Security

01. Keep software up to date

It may seem obvious, but ensuring you keep all software up to date is vital in keeping your site secure. This applies to both the server operating system and any software you may be running on your website such as a CMS or forum. When website security holes are found in software, hackers are quick to attempt to abuse them.

If you are using a managed hosting solution then you don't need to worry so much about applying security updates for the operating system as the hosting company should take care of this.

If you are using third-party software on your website such as a CMS or forum, you should ensure you are quick to apply any security patches. Most vendors have a mailing list or RSS feed detailing any website security issues. WordPress, Umbraco and many other CMSes notify you of available system updates when you log in.

Many developers use tools like Composer, npm, or RubyGems to manage their software dependencies, and security vulnerabilities appearing in a package you depend on but aren't paying any attention to is one of the easiest ways to get caught out. Ensure you keep your dependencies up to date, and use tools like Gemnasium to get automatic notifications when a vulnerability is announced in one of your components.

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02. Watch out for SQL injection

SQL injection attacks are when an attacker uses a web form field or URL parameter to gain access to or manipulate your database. When you use standard Transact SQL it is easy to unknowingly insert rogue code into your query that could be used to change tables, get information and delete data. You can easily prevent this by always using parameterised queries, most web languages have this feature and it is easy to implement.

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03. Beware of error messages

Be careful with how much information you give away in your error messages. Provide only minimal errors to your users, to ensure they don't leak secrets present on your server (e.g. API keys or database passwords). Don't provide full exception details either, as these can make complex attacks like SQL injection far easier. Keep detailed errors in your server logs, and show users only the information they need.

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04. Protect against XSS attacks

Cross-site scripting (XSS) attacks inject malicious JavaScript into your pages, which then runs in the browsers of your users, and can change page content, or steal information to send back to the attacker. For example, if you show comments on a page without validation, then an attacker might submit comments containing script tags and JavaScript, which could run in every other user's browser and steal their login cookie, allowing the attack to take control of the account of every user who viewed the comment. You need to ensure that users cannot inject active JavaScript content into your pages.

This is a particular concern in modern web applications, where pages are now built primarily from user content, and which in many cases generate HTML that's then also interpreted by front-end frameworks like Angular and Ember. These frameworks provide many XSS protections, but mixing server and client rendering creates new and more complicated attack avenues too: not only is injecting JavaScript into the HTML effective, but you can also inject content that will run code by inserting Angular directives, or using Ember helpers.

The key here is to focus on how your user-generated content could escape the bounds you expect and be interpreted by the browser as something other that what you intended. This is similar to defending against SQL injection. When dynamically generating HTML, use functions that explicitly make the changes you're looking for (e.g. use element.setAttribute and element.textContent, which will be automatically escaped by the browser, rather than setting element.innerHTML by hand), or use functions in your templating tool that automatically do appropriate escaping, rather than concatenating strings or setting raw HTML content.

Another powerful tool in the XSS defender's toolbox is Content Security Policy (CSP). CSP is a header your server can return which tells the browser to limit how and what JavaScript is executed in the page, for example to disallow running of any scripts not hosted on your domain, disallow inline JavaScript, or disable eval(). Mozilla has an excellent guide with some example configurations. This makes it harder for an attacker's scripts to work, even if they can get them into your page.

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Support

01. What kind of support do I need from a hosting company?

Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged.

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02. What is the most important feature of a hosting company?

Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged.

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03. Do I need 24 hour support website?

Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged.

It is a long established fact that a reader will be distracted by the readable content of a page when looking at its layout. The point of using Lorem Ipsum is that it has a more-or-less normal distribution of letters, as opposed to using

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04. How to move my website?

Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged.

It is a long established fact that a reader will be distracted by the readable content of a page when looking at its layout. The point of using Lorem Ipsum is that it has a more-or-less normal distribution of letters, as opposed to using

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05. How to setup a video blog?

Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged.

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06. How to move my website?

Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged.

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07. Any other hosting considerations with Minecraft?

Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged.

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Platforms

01. What is a web server?

Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged.

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02. Which web server do I need?

Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged.

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03. What is Apache?

Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged.

It is a long established fact that a reader will be distracted by the readable content of a page when looking at its layout. The point of using Lorem Ipsum is that it has a more-or-less normal distribution of letters, as opposed to using

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04. Do I have Appache web server?

Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged.

It is a long established fact that a reader will be distracted by the readable content of a page when looking at its layout. The point of using Lorem Ipsum is that it has a more-or-less normal distribution of letters, as opposed to using

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05. Do I need Apache to run a website?

Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged.

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