Web Server in Linux Operating System

Apache

Apache is a open source software and available in wide range of operating systems, including UNIX, LINUX & Windows.
The Majority of all web servers using Apache are Linux web servers.

Type of Web Services

Linux/Unix based web services

  • TUX- In kernel web server that supports only text
  • Apache- The most popular web server
  • AOL-  American Online free web server
  • Sun One- Web server from SUN previously called as Iplanet.
  • Netscape
  • Elinks
Elinks: It is a default application which is used to access internet websites in CLI Mode.

Virtual Hosting

Hosting more than one website on a single server is called as Virtual Hosting.
Types of  virtual Hosting
  • Name based Virtual Hosting
  • IP based Virtual Hosting
  • Port based Virtual Hosting

Requirement for Web Server:

  • Installation Packages
    • httpd*.rpm
  • Port No:
    • 80
  • Configuration File
    • /etc/httpd/conf/httpd.conf
  • Service/Daemon
    • httpd
  • Default Database location
    • /var/www/html

Configuration of Web Server

Step1: to configure Web server
Check system IP address
#ifconfig eth0
Assign the host name temporarily and permanent.
#hostname www.yahoo.com
# vi /etc/sysconfig/network
Edit the hostname
HOSTNAME=www.yahoo.com
:wq!
Add the host entries.
#vi /etc/hosts
go to insert mode
192.168.0.177    www.yahoo.com   www
192.168.0.177    www.group.com   www
192.168.0.176    www.gmail.com   www
:wq!
Then logoff & login
Install the packages for web server
#yum install http* -y
 Edit the configuration file
#vim /etc/httpd/conf/httpd.conf
Set the line numbers
:se nu
990 NameVirutalHost *:80 (remove the hash(#) and enable the line)
1003 <vitualhost*: 80>#NAME BASED HOSTING
         ServerAdmin root@yahoo.com
          DocumentRoot /var/www/html
          Servername www.yahoo.com
          DirectoryIndex yahoo.html
          </VirtualHost>
          <VirtualHost 192.168.0.176: 80>#IP BASED HOSTING
         ServerAdmin root@gmail.com
          DocumentRoot /var/www/html
          Servername www.gmail.com
          DirectoryIndex gmail.html
          </VirtualHost>
        <VirtualHost 192.168.0.177: 5000>#PORT BASED HOSTING
         ServerAdmin root@group.com
          DocumentRoot /var/www/html
          Servername www.group.com
          DirectoryIndex group.html
          </VirtualHost>
:wq!
 
Create HTML pages
#cd /var/www/html
html]#vi yahoo.html
html]#vi gmail.html
html]#vi group.html
Update the service
#service httpd restart
#chkconfig httpd on
Go the Sys2, Web Server client configuration
#vi /etc/hosts
Do not remove any entry which already exists
192.168.0.177    www.yahoo.com   www
192.168.0.177    www.group.com   www
192.168.0.176    www.gmail.com   www
:wq!
Logoff & Login
 
 

Comments

Post a Comment

Popular posts from this blog

Reasoning-Number Series

Complete the following series 225,224,____,222,221 a)220         b)223         c)219           d)226 Answer: b)      2. 17,19,23,29,31,37,______     a)41               b)43         c)40           d)42    Answer: If you look at the above series they are all prime numbers, next series will be 41        3.225,196,169,____,121,100,81     a)156              b)144         c)136           d)125 Answer: above series can be written as 15^2,14^2,13^2,____,11^2,10^2,9^2. The missing series is 12^2=144.     4.12,14,15,16,18,20     a)22              b)25         c)21           d)23 Answer: consider above series into two alternate parts. Like 12,15,18,____ & 14,16,20. Then the difference of two alternate series as follows: 3,3,3___ & 2,4. Next series after 18 need to be added with 3= 18+3=21.     5.64,125,216,343,__     a)64              b)424         c)317           d)512 Answer: The above series can be written, 4^3,5^3,6^3,7^3, then the next
Read more

Reasoning-Letter Series

Question & Answers 46. abc-a--d-bcdabcd (1)d b b a        (2)d c a a        (3)a b c d     (4)d b c a 47.b-da-cda-c-abc (1)a a b b        (2)d b c a        (3)a d b c     (4)c b b d 48. a a a b -b c - - a a - (1)a b b c        (2)a c b c        (3)b a c a     (4)b c c a 49. -b a b - b c b c - c a - a b (1)a b c c         (2)a b c b        (3)a c a c     (4)a a c b 50.a b c - - c b a a - c d d c - a (1)d b d b        (2)d d b b         (3)b c a d     (4)a d b c 51.E, A _, O, I (1)E        (2)U        (3)X     (4)V 52.D , F ,G, H , J ,K , L, M , N __ (1)O        (2)Q        (3)P     (4)R 53.E, J, O , T, Y, ____ (1)D        (2)Z        (3)C     (4)E 54.G, J, N , Q, U, ____ (1)W        (2)X        (3)Y     (4)Z 55.R, K, F, C, ____ (1)Z        (2)Y        (3)W     (4)A 56. BY,CX,EV, GT, KP,____ (1)JQ        (2)MN        (3)PK     (4)LO 57.AI,EO,IU,__,UE (1)OU        (2)OI        (3)UA     (4)OA 58.AP, BQ, CR, DS, ____ (1)ET        (2)EU        (3
Read more

Multiply Negative numbers in java

For this challenge, you will be given an array and you are asked to count how many numbers are negative and multiply them and print the output to the STDOUT.  Input Format  -  you will be taking a number as an input from STDIN which tells about the length of the array. On another line, array elements should be there with single space between them.  Output Format  -  print the multiplication to the STDOUT.  Sample Test Case:   Sample Input: - 7 -8 -7 6 0 7 -1 6 Sample Output  -  -56  Explanation:   There are three negative numbers present in the array and their multiplication comes out to be -56.
Read more