How to install apache on centos7

Apache HTTP server is the most popular web server in the world. It is a free, open source and cross-platform HTTP server that offers powerful functionality and can be extended through various modules. The following instructions describe how to install and manage the Apache web server on a CentOS 7 machine.

Installing Apache

Apache is available in the default CentOS repository and installation is very simple. On CentOS and RHEL, the Apache package and service is called httpd. To install the package, run the following command:

sudo yum install httpd

Once the installation is complete, enable and start the Apache service:

sudo systemctl enable httpd
sudo systemctl start httpd

If you are running a firewall, you will also need to open HTTP and HTTPS ports 80 and 443:

sudo firewall-cmd --permanent --zone=public --add-service=http
sudo firewall-cmd --permanent --zone=public --add-service=https
sudo firewall-cmd --reload

We can check the status and version of the Apache service by:

sudo systemctl status httpd

Output:

 httpd.service - The Apache HTTP Server
  Loaded: loaded (/usr/lib/systemd/system/httpd.service; enabled; vendor preset: disabled)
  Active: active (running) since Thu 2018-04-26 07:13:07 UTC; 11s ago
    Docs: man:httpd(8)
          man:apachectl(8)

 Main PID: 3049 (httpd)
  Status: "Total requests: 0; Current requests/sec: 0; Current traffic:  0 B/sec"
  CGroup: /system.slice/httpd.service
          ├─3049 /usr/sbin/httpd -DFOREGROUND
          ├─3050 /usr/sbin/httpd -DFOREGROUND
          ├─3051 /usr/sbin/httpd -DFOREGROUND
          ├─3052 /usr/sbin/httpd -DFOREGROUND
          ├─3053 /usr/sbin/httpd -DFOREGROUND
          └─3054 /usr/sbin/httpd -DFOREGROUND

sudo httpd -v

Output:

Server version: Apache/2.4.6 (CentOS)
Server built:  Oct 19 2017 20:39:16

Finally, to verify the installation, open your server IP address http://YOUR_IP

Use systemctl to manage the Apache service

## in a browser of your choice #We can manage the Apache service like any other system unit.

To stop the Apache service, run:

sudo systemctl stop httpd

To start again, type:

sudo systemctl start httpd

Restart the Apache service:

$sudo systemctl restart httpd

While doing some Reload the Apache service after configuration changes:

$sudo systemctl reload httpd

If you want to disable the Apache service to start on boot:

$sudo systemctl disable httpd

and re-enable it:

$sudo systemctl enable httpd

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