Install Apache(httpd) 2.4.29 on Centos

2017-11-20

In this blog, I am going to note down how to install Apache (a.k.a. httpd) on Centos from scratch.

It is convenient and easy to install Apache of version 2.3 on Centos via yum.
Open terminal and type following commands.

Step 1: Clean up and update yum

1 2	sudo yum clean all sudo yum update

Step 2: Install Apache(httpd)

1	sudo yum install httpd

Step 3: Once it is installed successfully, you can start running the server by

1	sudo service httpd start

1	/sbin/service httpd start

You may encounter following errors when typing the command above:

Starting httpd: httpd: apr_sockaddr_info_get() failed for iZj6c51h65my55t39wxrguZ
httpd: Could not reliably determine the server's fully qualified domain name, using 127.0.0.1 for ServerName
(98)Address already in use: make_sock: could not bind to address 0.0.0.0:80
no listening sockets available, shutting down
Unable to open logs
                                                           [FAILED]

One way to fix it is

Change the hostname into ip address of your own server

nano /etc/httpd/conf/httpd.conf
ServerName hostname/ip address 
nano /etc/hosts.
ServerName hostname/ip address

Kill processes which occupy port 80
Reference1
Reference2

There you go. To test if Apache is successfully installed, direct your browser to your server’s ip address, you would see welcome page of Apache. Otherwise, it fails.

To uninstall apache, refer to Uninstall Apache

However yum can only install Apache v2.3. Some want to install Apache of version 2.4+, you need to install it from source, since yum doesn’t support higher version.

We could refer two blogs to install it from source.
How to Install Apache 2.4.2 from Source on CentOS 6.2 with SSL
Install Apache and PHP on CentOS 6

After install successfuly,
Stop service by

1	/usr/local/apache2/bin/apachectl stop

And then type the command:

1	vi /usr/local/apache2/conf/httpd.conf

Uncomment line

1 2	#ServerName www.example.com:80 ServerName your ip address

Then restart service by

1	/usr/local/apache2/bin/apachectl restart

Apache runs on port 80. In some versions of CentOS, a firewall, which is installed by default, blocks access to port 80. Perform the following steps to open the port.

Run following commands:

1	iptables -I INPUT -p tcp --dport 80 -j ACCEPT

After adding that instruction, save your firewall rules so that your web server is accessible the next time you reboot.

1	service iptables save

Test the Apache installation
Navigate to your Cloud Server IP address (for example, http://192.***.14.***), it shows “It works”.

Check the version of Apache installed by

1	/usr/local/apache2/bin/apachectl -v

Got following messages:

1 2	Server version: Apache/2.4.29 (Unix) Server built: Nov 8 2017 01:12:34

To stop it

1	/usr/local/apache2/bin/apachectl stop