Archive for the ‘UK Web Hosting’ Category

db4 error

Saturday, November 26th, 2011

 

Error: db4 error(-30974) from dbenv->open: DB_VERSION_MISMATCH: Database environment version mismatch

Solution:  Remove the corrupted db file by ,

rm -f /var/lib/rpm/__db*

Then rebuild rpm database by command,

rpm –rebuilddb -v -v

That’s it. icon smile db4 error

 

 

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Change php version through .htaccess

Thursday, November 24th, 2011

If there are two php versions compiled on server and you wish to use php version for your domain other than the default one then make the  use .htaccess for this.

For example default php version on server is set to php 4 then all domains by default will use php4.  But certain applications installed on a domain runs only under php5 then in that case it is necessary that domain should use php5

Open .htaccess by any suitable editor like vi, pico etc. Put the following code into it.

Server without suphp enabled

AddType application/x-httpd-php5 .php .htm .html

Server with suphp enabled

AddHandler application/x-httpd-php5 .php .htm .html

Same way you can enable php4 if the default php version is php5. Just put the php4 instead php5 in above code.

 

 

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Activate cPanel license from shell

Thursday, November 24th, 2011
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Many users experience the following error while accessing WHM/cPanel

License could not be activated.

Following are some reasons due to which this error can be occurred.

1)If server hostname has been changed

2)If primary IP of cPanel server for which cPanel license was activated, has been changed.

3)Server firewall.

Here are some basic steps to fix this error.

Verify that cPanel license is activated at http://verify.cpanel.net.

If link shows that WHM is licensed then verify server hostname , primary IP just to ensure if it hasn’t been changed. Correct the primary IP address , hostname if it found to be changed.  Stop/start server firewall.

If server IP, hostname is correct then check if server’s primary IP address match with the IP address of license. For that type the following command from shell.

curl http://www.cPanel.net/showip.cgi

If output gives other IP address then you need to license that IP.

If everything appears to be corrected then just activate cPanel license from command line.

[email protected] [~]# /usr/local/cpanel/cpkeyclt

Hope you shouldn’t see any error at this time.

 

 

 

 

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Password protected directrories

Thursday, November 24th, 2011

Password protection restricts access to particular folder. Only authenticate users can access password protected folder.

 

Here are few steps with which you can enable password protection

 

1)Login to cPanel.

2)Click on icon Password Protect Directories. Directory Selection window will appear. 3)Click on radio button of web root and then click on Go button.

4)Click on folder name for which you wish to enable password protection.

5)Enable checkbox Password protect this directory.

6)Put proper name in the field Password protect this directory and click on save button.

 

Here you done with the password protection.

 

Now you need to add user with the password to access protected folder.

 

7)In the field username put username

8′) Then put the password in New password field, repeat the password  in Password (Again) field and then click on button Add/modify authorized user

Now try the URL just to confirm that password protection is working for desired folder. If you see username / password prompt then it indicate that password protection is enabled.

 

Quick steps to enable password protection from shell.

 

Create .htaccess file in folder which you wish to make it password protected and put the following content

 

AuthName “Restricted Area”
AuthType Basic
AuthUserFile /home/username/.htpasswd
<Limit GET POST PUT>
Require valid-user
</Limit>

 

Username should be cPanel user of the domain.

 

Now type the following command in shell to add username and password

 

htpasswd -c /home/username/.htpasswd testuser.

 

In apache 2.2 you may need to use absolute path of htpasswd, /usr/local/apache/bin/htpasswd

That will be prompted for new password. Put the desired password.

The newly username and password will be saved in /home/username/.htpasswd

Now open browser to access secure part of the webite just to ensure that you are prompted for username and password.

 

 

 

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Wildcard DNS and Wildcard SSL

Wednesday, November 23rd, 2011

Wildcard SSL

A wildcard ssl use to secure not only primary domain but also multiple subdomains added on it. SSL certificates are usually issued to fully qualified domain names (FQDN), so if you want to access your domain at secure link with www and without www then you would need two separate SSL Certificates.
There is no need of separate ssl certificate for www.domain.com and domain.com if you purchase wildcard ssl.

You can access a domain with www or without www with the wildcard SSL.
Any subdomain added on it can be accessible at secure link with the same wild card ssl installed at primary domain.

Wildcard DNS

A wildcard DNS record redirects requests for non-existent domain names (Usually subdomains that are not exists) to primary domain name.
For example if you type xyz.domain.com it will redirects the requets to domain.com.

A wildcard DNS record is specified by using a *  as the leftmost part of a domain name, e.g. *.domain.com.

For wildcard ssl, domain should have wildcard dns enabled on it. Follow the few steps here and you will be able to enable wildcard dns for domain on cPanel server.

A typical dns zone file of any domain on cPanel server,

; cPanel 11.28.60-RELEASE_50962
; Zone file for domain.com
$TTL 600
@      600      IN      SOA     ns9.dns.com. admin.domain.com. (
2011020102      ; serial, todays date+todays
86400           ; refresh, seconds
7200            ; retry, seconds
3600000         ; expire, seconds
86400 )         ; minimum, seconds

domain.com. 600 IN NS ns9.dns.com.
domain.com. 600 IN NS ns10.dns.com.

domain.com. IN A x.x.x.x

localhost.domain.com. IN A 127.0.0.1

domain.com. IN MX 0 domain.com.

mail IN CNAME domain.com.
www IN CNAME domain.com.
ftp IN A x.x.x.x
cpanel IN A x.x.x.x
whm IN A x.x.x.x
webmail IN A x.x.x.x
webdisk IN A x.x.x.x

Open the dns zone file of domain by vi editir or from WHM >  Main >> DNS Functions >> Edit DNS Zone and simply add the entry

*.domain.com IN A x.x.x.x

Save the file and restart the named sevice.

Now one more change need to done in apache.conf but here you need to add one more entry in serveralias.

Open apache configuration file on server by vi editor as vi /usr/local/apache/conf/httpd.conf. Add serveralias for domain as
*.domain.com

<VirtualHost x.x.x.x:80>
ServerName domain.com
ServerAlias www.domain.com *.domain.com
DocumentRoot /home/cpanel_user/public_html
ServerAdmin [email protected]

Save the changes and restart apace server.  Once this done you are free to install wildcard ssl on domain

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Linux Hosting Company

Wednesday, May 18th, 2011

Linux is the most popular platform for use by web hosting companies as it is low cost and Linux servers are easy to maintain, providing web hosting companies with a win-win situation as they are able to offer highly profitable web hosting plans whilst reducing the amount of effort that will need to be put in to maintain the server. Linux shared hosting plans are often seen as the cheapest web hosting packages available because you are combining an open source operating system with the cheapest form of web hosting, the result of which will be web hosting services that pretty much anyone can afford, although the specifications of shared web hosting plans are only generally suitable for users with the most basic of needs. There are many different Linux distributions to choose from if you are looking into using Linux VPS server hosting or Linux dedicated server hosting, providing you with the opportunity to develop a completely custom web hosting service that will be able to meet your Linux hosting needs. The benefit of using a specialist Linux web hosting company is that they will be able to provide you with support that is tailored towards the operating system and if you face any issues with your Linux web hosting service then their technicians should be able to sort the issue in no time at all. As Linux is an open source operating system, it is offered by most web hosting providers meaning that there will be a large number of Linux hosting companies to choose from.

Benefits of Using the Linux Operating System

There are many benefits to using the Linux operating system in a web hosting environment, especially for consumers who are looking for low-cost web hosting services. The main benefits that are available from using Linux web hosting include:

  • Open source – as the Linux operating system is open source, it allows web hosting companies to offer low cost web hosting services without compromising the quality of the web hosting service provided – when compared to commercial platforms such as Windows, open source operating systems are able to provide the benefit of full access to the operating system source code meaning that modifications can be made to the core of the platform if required as some larger web hosting providers may choose to do this if they are looking to offer improved levels of security and a more stable platform than what other web hosting companies can provide
  • Reliability – when compared to Windows web hosting plans, Linux web hosting plans are seen as being more reliable and can provide customers with a worry-free web hosting experience – the issue that many web hosting companies are trying to overcome is downtime because this can be a major disadvantage to businesses that rely on their websites to provide them with a source of income, whether that be through advertising or sales of a product, because in such situations downtime can cost money – it is recommended that you choose a web hosting plan that can provide you with an uptime guarantee, simply so you know what to expect from your web hosting package
  • Security – the security of Linux web hosting servers is seen as being stronger than that of a Windows server because there are many different measures that can be taken to provide a high level of security to Linux hosting customers – as well as using software firewalls to improve the level of security surrounding a Linux web hosting server, hardware firewalls are also recommended as well as measures to prevent SQL injections that could potentially take place through hosted web pages that are using weak code.

Disadvantages of Using Linux Web Hosting

There can also be disadvantages to using the Linux platform under some circumstances, include but not limited to:

  • Management – the management of Linux servers can be seen as being an issue in some situations because you can only manage a Linux server through the command line over SSH meaning that you need to have some sort of basic knowledge as to how the Linux operating system functions so that you know what commands to use to complete certain tasks that will need to be done as part of maintaining your server – however, if you are inexperienced with server management then you can always consider using a fully managed Linux server hosting service as a way of having your needs met because this will take the responsibility of managing your Linux server away from you and will pass it on to an experienced support team who will do a professional job of it – if you do have experience with managing Linux servers then you can use this to your advantage by purchasing an unmanaged Linux server which you can then manage yourself, saving yourself money in the process
  • Hacker target – because Linux is so widely used by large businesses and web hosting providers alike, Linux servers are often one of the main targets for hackers that are looking to gain access to systems illegally to steal the data and other information held on them – this can be an issue for some because it means that more advanced security measures have to be taken to protect Linux web hosting servers and the data that they hold and this can cost web hosting companies both time and money to ensure that the task is completed to a high level.

In conclusion, there are many different Linux web hosting companies to choose from and because of this you should consider each company based on their own merits as opposed to what they are able to offer in terms of web hosting plans as there is likely to be little difference between the services provided by individual web hosting companies. For the most part you won’t need to be worrying about the Linux distribution that is being used unless you are using Linux dedicated web hosting and have highly specific requirements as this will provide you with an opportunity to select an OS that has been designed for a specific purpose.

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Green Hosting Explained

Saturday, February 19th, 2011

What is green web hosting?

Green hosting is the term that is applied to web hosting companies utilizing technologies that will allow them to become “carbon neutral” or reduce their overall carbon emissions in order to reduce the impact that they are having on global warming. There are a variety of different methods available and steps that can be taken to become a “green web hosting provider” and as the focus on global warming becomes ever more intense, more businesses are looking to improve their “green image” where possible and choosing green hosting is one way in which they can achieve this.

Electricity from Wind Turbines

11 300x67 Green Hosting Explained

Using green energy sources is one of the main methods that web hosting companies are taking on board to help improve their green hosting image. Electricity from wind turbines is one of the most cost-efficient ways of achieving this to power data centre equipment including servers and routers because they are fairly cheap to install and yield better results when compared to other options. In simple terms, wind turbines deliver power to servers in the following way:

  • Wind turbines can be installed on the site of the data centre to reduce the need for the power to travel through the national grid as this can increase costs
  • The power generated is exclusively used for the data centre, any excess power generated can be fed back to the National Grid as this will provide the data centre with an extra source of income
  • The power can then be used to power the equipment that resides in the data centre, from servers to routers it is all covered and this is without the need for any modifications to the power supplies or the architecture of the power system.

However, the problem with wind turbines is that the generation of electricity is reliant on the weather conditions at the time because if there is no wind then there is no way for electricity to be generated. In such a situation any well-organized data centre will also have mainline power available for use if needs be. If a data centre can be built upon the idea of using renewable energy sources over traditional sources of energy then this will help to reduce the carbon footprint of the given data centre.

Energy Efficient Equipment

In an age where servers are becoming more powerful, people are becoming more cautious of their electricity usage and reliance on non-renewable energy resources. As power becomes more expensive, it is important for hardware manufacturers to develop new products and technologies that use less energy whilst still retaining the developments that have been made with faster processors and memory.

By adopting more energy efficient hardware in their data centres, web hosting companies will be able to reduce their monthly power bills whilst reaping the benefits of having access to more powerful hardware and routers. Such options for more energy efficient hardware may include:

  • Using newer processors that have been manufactured to specifically use less energy at the current generation of server processors, whilst maintaining performance and offering new benefits
  • Moving to use SSDs (solid state hard drives) that are based on more modern flash memory over existing disk-based hard drive solutions used by most server vendors.

Virtual Hosting

21 300x300 Green Hosting Explained

Virtual hosting is another popular method being adopted to help save rack space and to reduce web hosting providers’ reliance on physical servers. Like VPS hosting, virtual hosting allows web hosting companies to purchase one powerful server and then merge existing servers into being separate virtual machines on the physical server. Virtual hosting is able to offer benefits such as:

  • Consolidation of multiple servers into one server, saving on rack space and reducing a web hosting company’s overall power usage because only one server will be in use instead of several
  • Virtual servers will be easier to manage over physical boxes because the daemon software that will be running on the virtual host node will provide you with additional software tools that will allow you to control the state of your virtual servers from the desktop
  • Money will also be saved if you are only purchasing one server over several because you will only be paying for the rack space used by one server in comparison to having to pay for the rack space that is being taken up by several servers.

In conclusion, green web hosting providers can achieve the status of being “carbon neutral” through the adoption of several different techniques that will affect their hardware arrangements as well as how their hardware is powered. The investment in renewable energy sources is long-term which is a reason for not every web hosting company being so keen on it as some will prefer to see instant results over long-term benefits. However, in an age where more businesses are becoming more interested in green technologies, it pays for web hosting providers to research green hosting methods.

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CMS Hosting Service

Thursday, December 2nd, 2010

A CMS (content management system) will provide you with a better alternative to how you can manage your website and will make it easier for you to add and modify the content that you display to your visitors. CMS systems are based on various scripting languages and there are different CMS systems available for different scenarios and web hosting platforms meaning that choosing one to integrate with your web hosting service shouldn’t be too much of a task on its own. Any content management system should be expandable through the use of plug-ins that are available; most open source CMS systems have large plugin databases for you to choose from as you wish, although the number of plugins available for commercial CMS systems is going to be smaller simply because it is unlikely that there is going to be such a large user base. A web hosting account capable of hosting your CMS based website will be available depending on the exact CMS system that you have chosen to use because all content management applications will have different requirements in terms of the scripting language that has been used as well as the database application that is required to drive the backend.

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Benefits of Cloud Hosting

Saturday, November 27th, 2010

Cloud web hosting is seen by many as being the future of web hosting because it offers users a distributed hosting environment that can be used for the hosting of all virtual forms of web hosting whilst maintaining existing pricing levels, if not reducing the cost of web hosting services in some cases. If you are looking for a shared web hosting package that can offer you the reliability that you are longing for then cloud hosting is ideal for this; web hosting companies are able to host a massive number of websites in a shared clustered hosting environment meaning that won’t have to pay over the hill for a cloud web hosting package in this situation. If you prefer to use VPS servers then there are also clustered and cloud VPS server hosting solutions available to meet your requirements; VMWare is by far the most popular choice for web hosting companies wanting to offer cloud VPS hosting, although Hyper-V can also be used in situations where Windows VPS server hosting is being offered. A cloud hosting package can also offer you better security, providing you with peace of mind meaning that there won’t be any need to worry about the impact that hackers could have on the performance of your website.

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Shared Hosting vs. Reseller Hosting

Saturday, November 27th, 2010

Shared hosting and reseller hosting services tend to be hosted on the same servers as both use a shared web hosting environment meaning that you will be sharing the resources of the server with other websites that are hosted on the server. Although shared web hosting packages are cheap, it doesn’t subtract from the quality of your web hosting experience and so you should be provided with a web hosting service that will allow you to get good value for money. When considering a reseller hosting package you should take into account the fact that you shouldn’t have high expectations of the reliability and stability of your web hosting service because you are still going to be using the same web hosting environment as a shared web hosting package. A web hosting company capable of offering shared web hosting should also be offering reseller web hosting meaning that you should be upgrade as you require without too much hassle, although this will be dependent on the web hosting platform and control panel that you are using. As with most web hosting services, you will also be able to choose between Linux web hosting and Windows web hosting when purchasing a shared hosting package or a reseller hosting package, ensuring that there is a platform available suitable of meeting your needs.

Benefits of Shared Web Hosting

There are many benefits to using shared web hosting, especially for those who are using web hosting services for the first time as they are easy to manage but are also low cost and low maintenance. Since you won’t have to worry about the maintenance of the server that your shared web hosting account is hosted on, you will be able to focus on managing your web hosting account and setting it up correctly. A shared hosting server will be managed by your web hosting company so that you won’t have to worry about needing any knowledge when it comes to the management of servers and operating systems; however, this does reduce the flexibility of a shared hosting package. The low cost of shared web hosting has to be the biggest attraction for most users because it provides you with an affordable web hosting service that is easy to use; your choice of platform will obviously affect how much you pay as will any additional extras that you have chosen to enhance your web hosting package.

Benefits of Reseller Hosting

Unlike a shared hosting package, a reseller web hosting service will allow you to create your own client accounts that you can then share with others if you are going to be hosting the websites of other people but don’t want to have to be managing them as well. Reseller web hosting services are designed to allow you to offer your own web hosting packages based on the resources that you have available with your chosen web hosting plan; most web hosting companies will provide you with access to a web hosting control panel that will allow you to add your own client accounts as required – your clients will then be able to access their own web hosting account using the assigned username and password. As is the case with shared web hosting, you can purchase Windows reseller hosting packages and Linux reseller hosting packages meaning that if you want to start your own web hosting business, it is easy to offer packages on both platforms. Although some shared web hosting services do allow the hosting of multiple domains, a reseller hosting package provides this feature in a way that is more organised and easier to manage.

Resources

The resources available with a shared web hosting package will be much different to those assigned to a reseller hosting service, simply because a reseller hosting package is typically an upgrade over a shared web hosting package. For the most part a shared web hosting service is to help you get started with web hosting so that you are able to upgrade when needs be without being prevented with too much of a challenge; the resources reflect this idea as you won’t be able to store too much in your web space, but there is enough disk space available to cope with the hosting of small websites. If you require a web hosting package that is hosted in a shared environment that can offer you resources greater than a standard shared web hosting service then a reseller web hosting package will be the way forward for you; even though a reseller package is designed for multiple domain hosting, there is nothing to stop you from hosting one website that you can then assign all of your account’s resources to so that you end up with one account that has a large amount of resources to use.

Support

Any good web hosting company should offer the same level of support for shared web hosting customers and reseller web hosting customers as they are going to be sharing the same servers. As a reseller customer, your web hosting provider may be able to offer support to your customers as well which could be an added advantage as it will remove the need for you to deal with enquiries generated by your customers. As a shared hosting customer you may not always receive a high level of support as shared hosting isn’t always the main focus of all web hosting businesses.

In conclusion, shared web hosting and reseller hosting services both share the same common hosting environment and are aimed at the lower end of the web hosting market rather than the higher end. The cost of shared web hosting makes it attractive to those who are using web hosting for the first time because it means that they have nothing to lose if they find that they require a more powerful web hosting service; the price of a reseller web hosting package will also be attractive for those who may be considering starting their own web hosting business.

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