HOME

Install Apache :

Prerequisites

Before you begin this guide, you should have a regular, non-root user with sudo privileges configured on your server/machine.

Apache is available within Ubuntu’s default software repositories, so we will install it using conventional package management tools.We will begin by updating the local package index to reflect the latest upstream changes. Afterwards, we can install the apache2 package:
Open your terminal and run below commands.

sudo apt-get update

sudo apt-get install apache2

Check status of Apache .Run following command.

sudo systemctl status apache2

You will see below output

 apache2.service - LSB: Apache2 web server
   Loaded: loaded (/etc/init.d/apache2; bad; vendor preset: enabled)
  Drop-In: /lib/systemd/system/apache2.service.d
           └─apache2-systemd.conf
   Active: active (running) since Fri 2017-05-19 18:30:10 UTC; 1h 5min ago
     Docs: man:systemd-sysv-generator(8)
  Process: 4336 ExecStop=/etc/init.d/apache2 stop (code=exited, status=0/SUCCESS)
  Process: 4359 ExecStart=/etc/init.d/apache2 start (code=exited, status=0/SUCCESS)
    Tasks: 55
   Memory: 2.3M
      CPU: 4.094s
   CGroup: /system.slice/apache2.service
           ├─4374 /usr/sbin/apache2 -k start
           ├─4377 /usr/sbin/apache2 -k start
           └─4378 /usr/sbin/apache2 -k start

If you dont see status as Active run following command

sudo systemctl restart apache2

Then Check status it will show status as Acive.

Now open your browser and type localhost in URL, in case of server type IP address of that server you will see default page of Apache.

Configure multiple instance of Apaches on single machine.

Open your terminal.
Go to cd /usr/share/doc/apache2/examples this directory.You will find setup-instance file.
Execute that file using sh setup-instance server2 command where server2 is a suffix.That is it appends apache2- by default to your instance name.

Note: you can give any name.

sudo sh setup-instance server2
[sudo] password for user: 
Setting up /etc/apache2-server2 ...
systemd is in use, no init script installed
use the 'apache2@server2.service' service to control your new instance
sample commands:
systemctl start apache2@server2.service
systemctl enable apache2@server2.service

Above 2 commands are used to start and enable apache2@server2. After running these 2 commands you will see output like :

user@idp:~$ systemctl start apache2@server2.service
user@idp~$ systemctl enable apache2@server2.service
Created symlink /etc/systemd/system/multi-user.target.wants/apache2@server2.service → /lib/systemd/system/apache2@.service. 

To test weather your 2nd instance is running or not type following command

systemctl status apache2@server2.service


● apache2@server2.service - The Apache HTTP Server
   Loaded: loaded (/lib/systemd/system/apache2@.service; enabled; vendor preset: enabled)
   Active: active (running) since Thu 2018-06-14 11:53:16 IST; 39s ago
 Main PID: 17211 (apache2)
    Tasks: 55 (limit: 4915)
   CGroup: /system.slice/system-apache2.slice/apache2@server2.service
           ├─17211 /usr/sbin/apache2 -d /etc/apache2-server2 -k start
           ├─17212 /usr/sbin/apache2 -d /etc/apache2-server2 -k start
           └─17213 /usr/sbin/apache2 -d /etc/apache2-server2 -k start 

Now you should see a new directory /etc/apache2-server2 which contains all config files. It would also create /etc/init.d/apache2-server2 using which you can start your apache instance.
Get into /etc/apache2-server2/sites-available directory, you will find 000-default.conf file edit this file with your servername in my case I put servername as localhost2 and also change the port because port 80 is occupied by the default apache instance so here you need to change the port also I choose port 8089 in my case. Below is a screenshot of file.

Check for available port by typing command sudo netstat -tlnp.

<VirtualHost localhost2:8089>
	# The ServerName directive sets the request scheme, hostname and port that
	# the server uses to identify itself. This is used when creating
	# redirection URLs. In the context of virtual hosts, the ServerName
	# specifies what hostname must appear in the request's Host: header to
	# match this virtual host. For the default virtual host (this file) this
	# value is not decisive as it is used as a last resort host regardless.
	# However, you must set it for any further virtual host explicitly.
	#ServerName www.example.com
	ServerName localhost2 
	ServerAdmin webmaster@localhost
	DocumentRoot /var/www/html
	ErrorLog ${APACHE_LOG_DIR}/error.log
	CustomLog ${APACHE_LOG_DIR}/access.log combined
</VirtualHost>

Change the port.conf file which is present in /etc/apache2-server2, Below I am giving screenshot of my port.conf file.

Listen 8089

<IfModule ssl_module>
	Listen 443
</IfModule>

<IfModule mod_gnutls.c>
	Listen 443
</IfModule>

After doing above steps specify your servername into /etc/hostname file and also add a entry of newly created servername into /etc/hosts file.

127.0.0.1	localhost
127.0.1.1	localhost2
192.168.1.128	localhost

#The following lines are desirable for IPv6 capable hosts
::1     ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters

After all this I think we should run following commands

Start default Apache

service apache2 restart

Check its status

service apache2 restart

Start another server

service apache2@servere2 restart

Check its status

service apache2@server2 status

Now check into browser, open two different tabas and type localhost and localhost2:8089 respectively in URL of tab1 and tab2.

You will see the default login page in two diffrent tabs.

you’re done.