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Details
Redhat
The php-mbstring is part of Redhat's server optional packages. If you have a current subscirption all you need to do is to enable this repository using: 
[root@rhel7 ~]# subscription-manager repos --enable=rhel-7-server-optional-rpms
and use yum to install php-mbstring. In case that you do not have a current Redhat subscription you can install php-mbstring directly from IUS project repository: 
[root@rhel7 ~]# wget http://dl.iuscommunity.org/pub/ius/stable/Redhat/7/x86_64/ius-release-1.0-13.ius.el7.noarch.rpm
[root@rhel7 ~]# wget http://dl.fedoraproject.org/pub/epel/7/x86_64/e/epel-release-7-2.noarch.rpm
[root@rhel7 ~]# rpm -Uvh *release*.rpm

Details
Redhat
This tutorial will show how to setup a basing LAMP environment on RHEL7. This guide is logically split into three parts:
  • Installation of Apache Webserver
  • Installation of PHP support
  • Installation of MariaDB database
Each section will guide you step by step and will also provide simple tests to test each above step.
NOTES:
The default database MySQL was on replaced by MariaDB fork. It uses same php-mysql module to talk to MariaDB database from php script.

Installation of Apache Webserver

First we need to install Apache webserver. The package and service is called httpd: 
[root@rhel7 ~]# yum install httpd
Start httpd service: 
[root@rhel7 ~]# service httpd start
Redirecting to /bin/systemctl start  httpd.service
Enable firewall to allow http port 80 access: 
[root@rhel7 ~]# firewall-cmd --zone=public --add-port=80/tcp --permanent
[root@rhel7 ~]# firewall-cmd --reload

Details
Redhat
This guide will show a basic installation of the apache webserver on Redhat 7 Linux (RHEL7). The service and installation package is called as httpd. First we need to install a base apache package httpd: 
[root@rhel7 ~]# yum install httpd
Now we can start httpd service: 
[root@rhel7 ~]# service httpd start
Redirecting to /bin/systemctl start  httpd.service
Check the status of httpd service: 
[root@rhel7 ~]# service httpd status
Redirecting to /bin/systemctl status  httpd.service
httpd.service - The Apache HTTP Server
   Loaded: loaded (/usr/lib/systemd/system/httpd.service; disabled)
   Active: active (running) since Thu 2014-09-04 17:20:17 WST; 17s ago
 Main PID: 2234 (httpd)
If you get a following errors: 
Sep 04 17:20:12 rhel7 httpd[2234]: AH00557: httpd: apr_sockaddr_info_get() failed for rhel7
Sep 04 17:20:12 rhel7 httpd[2234]: AH00558: httpd: Could not reliably determine 
the server's fully qualified domain name, using 127.0.0.1. Set the 'Server...his message
You can fix it by a following linux command:
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[root@rhel7 ~]# echo 'ServerName 127.0.0.1' >> /etc/httpd/conf/httpd.conf
[root@rhel7 ~]# service httpd restart

Details
Redhat
By default the port 80 for http connection is filtered on Redhat 7 as you can only access this port from the actual localhost and not from any other public host. To open a port 80 on RHEL 7 Linux we need to add an iptables rule. For this RHEL7 uses firewall-cmd. First add your port 80 rule with a following linux command: 
[root@rhel7 ~]# firewall-cmd --zone=public --add-port=80/tcp --permanent

Details
Redhat

Operating System

Red Hat Enterprise Linux Server release 7.0 (Maipo)

Description

The error: 
httpd: apr_sockaddr_info_get() failed for rhel7
apears when starting apache webserver daemon httpd. It can be seen when executing httpd service status command:

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