Introduction to Webhosting Concepts

1. what is webhosting?
In simple words, sharing or placing the files (web pages) on to the internet(public network)

2.What is Website?
Collection of hyperlinked webpages.

3.Available webhosting methods.

#Free webhosting (Free of cost but has some limitations)
#shared webhosting
#virtual webhosting
#dedicated webhosting
#Reseller webhosting
#co-location servers

Domains:

Types:

Subdomain, Addon domain, Parked domain

4.Subdomains
A subdomain is of the format: subdomain.domain.com and can point to a folder on your site or a page – even another domain.

To add this first log into your control panel and click on the Subdomain button

On that page you will see a text box followed by a drop down box with your domain in it. In the text box, enter the subdomain you want (if you wanted to create forum.domain.com you would type in forum) Then click Add.

To forward the subdomain to a specific place/page, select the subdomain below and click ‘Setup Redirection’ – On that page you will see a box starting with http://, in there enter in the full location you would like the subdomain to forward to following the instructions on the page. If you just want to have the subdomain forward to a folder on your site, type in the full address you want it to go to and click Save. You will notice back at the Subdomains page that your subdomain is listed at the top and in brackets it will list where it is being redirected.
By default, a subdomain will point to a folder in your public_html directory with the same name.

5.Addon Domains
An addon domain allows you to have a domain name point to a folder or subdomain on your site. For example, if you owned the domain name myforum.com you could have it display the contents of forum.mydomain.com.
To add one of these you will first need to own an additional domain to have added – and make sure to have the domain name’s DNS Nameservers pointing to:
ns.clickhost.net
and
ns2.clickhost.net

Once that has been set up, log into your control panel and click on the ‘Addon Domains’ icon. On that page is the form to set up the addon domain, which is treated like its own hosting account.
Enter the domain name in the format: domain.ext (leave out the http:// and www – for example, myforum.com). Then enter the username/subdomain/directory name you want to have access to it, and then enter a password for the new ‘account’ and click ‘Add Domain!’.
You can also set up redirection for your addon domains on the same page to send the domain to a specific location within your site.

6.Parked Domains
Parked domains are similar to our previous ‘Pointed Domains’ addon – they simply point an additional domain name to your main site. For example, if you owned domain.com and mydomain.com you could have them both take visitors to the same location.

Similar to an Addon domain, you will need to own the domain name already and have the DNS Nameservers pointing to:
ns.clickhost.net
and
ns2.clickhost.net

To then add the pointed domain, log into your control panel and click on the Parked Domains icon. On that page just enter the domain name in the text box in the format domain.ext (such as mydomain.com) and click ‘Add Domain’.

7.what is DNS?
DNS is Domain Name Service it is used to resolving Domain name to IP(v4)/(v6) Addresses.

8.Types Of DNS Resords.
*TTL record – Time to Live
*A record – Maps domain names to IPv4 Address
*AAAA record – Maps domain names to IPv6 Address
*SoA – Stat of Authority
*NS – Name Server Record
*PTR – Pointer Record, It is used to maps IP address to domainname(reverse DNS)
*MX – Mail Exchange Record -Denotes the mail server
*CNAME – Canonical Name Record it is used for the canonical names of your domain name.
For Ex:
domain name is http://www.example.com
www2.example.com CNAME
here www2.example.com also takes you the home page of http://www.example.com.

9.Datacenters
Centralized server area with redundancy of power,hardware/networking components and redundancy of data with advanced security features.
*24/7 support
*99.9% server uptime
*prevention from dataloss
*high bandwidth
*Providing Management tools like C-panel,WHM, H-sphere, plesk
*we can avail FTP,Webservers,DNS,Database,Application Servers,Mail servers.

10.Registrar
Who is register your domain and dns servers they are called registrars. The main record (domains,DNS) is maintained by Internet Corporation for Assigned Names and Numbers (ICANN)
Ex. Registrars : Enom,Godaddy,Register.com,Tucows

11.Registrant
Who is the owner of the domain or dns servers

12.What is Control Panel?
A Control panel in web hosting refers to the interface provided by the hosting company for the maintenance and monitoring of the hosted website.

Control Panels:
cPanel,WHM,plesk,H-Sphere,Webmin

Login in to Control Panels :

How to login into cPanel :
domainname (or) serverIP/cPanel
domainname (or) serverIP:2082
Through https,
domainname (or) ServerIP/cpanel
domainname (or) serverIP:2083


WHM :

How to login into WHM
domainname (or) serverIP/cPanel
domainname (or)serverIP:2086
Through https,
domainname (or) serverIP/whm
domainname (or) serverIP:2087

H-Sphere :
domainname (or) ServerIP:8080

Plesk :
serverIP:8443

note: In Plesk panel you can login only through https.

13.What is an Operating System(OS)?
An operating system (sometimes abbreviated as “OS” is the program that, after being initially loaded into the computer by a boot program, manages all the other programs in a computer. The other programs are called applications or application programs. The application programs make use of the operating system by making requests for services through a defined application program interface (API). In addition, users can interact directly with the operating system through a user interface such as a command language or a graphical user interface (GUI).

14.Some Distributions(Flavours) of Linux (widely used)
1.Redhat Enterprise Linux (RedHat Inc.,)
2.FreeBSD (Open Source)
3.CentOS (Open Source)
4.Debian (Open Source)
5.Fedora Core (Open Source)
6.OpenSUSE (Open Source)
7.Ubuntu (Open Source)
8.Gentoo (Open Source)
8.Mandriva
9.Linpus (Open Source)
10.Slackware
11.Linspire
12.SMEServer(Open Source)
13.Knoppix
14.FreeSpire (Open Source)

15.You can download the most of the above Linux distributions from the following links :
http://www.linux.com/download_linux/
http://www.redhat.com/apps/download/
http://www.linux.org/dist/list.html
http://www.novell.com/linux/download_linux.html
http://www.hungrypenguin.net/downloads.html
iso.linuxquestions.org/
http://www.ubuntu.com/getubuntu/download
http://www.mandriva.com/en/download

RPM packages Downloads

rpm.pbone.net

http://mirror.centos.org/centos/5/extras/x86_64/RPMS/

Latest Version of Linux Kernel
2.6.28.2
You can download it from : http://www.kernel.org/

Latest version of Apache

Apache 2.2.11
You can download it from : httpd.apache.org/download.cgi

Latest version of PHP
PHP 5.2.8
You can download it from : http://www.php.net/downloads.php

Latest version of Sendmail
Sendmail 8.14.3
You can download it from:
http://www.sendmail.org/releases/8.14.3

Latest version of Exim
Exim 4.69
You can download it from: exim.patan.com.ar/

Latest version of Postfix
Postfix 2.5
You can download it from:
ftp://ftp.cuhk.edu.hk/pub/packages/mail-server/postfix/official/postfix-2.5.6.tar.gz

Latest version of qmail
qmail 1.1.15
You can download it from: iain.cx/qmail/mysql/download.html

– Jayachandran Palanisamy.

chandranjoy@gmail.com

+91 98944 97649

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