https://wiki.freepbx.org/display/FOP/Installing+FreePBX+13+on+CentOS+7
Work as root user so for that type in the terminal:
Su
And then enter your password: Khazzi1995
Now we have to disable selinux:
For starters, SELinux is described as a mandatory access control (MAC)
security structure executed in the kernel. SELinux offers a means of enforcing
some security policies which would otherwise not be effectively implemented
by a System Administrator.
When you install RHEL/CentOS or several derivatives, the SELinux feature or
service is enabled by default, due to this some applications on your system
may not actually support this security mechanism. Therefore, to make such
applications function normally, you have to disable or turn off SELinux.
Important: If you don’t want to disable SELinux, then you should read the
following articles to implement some mandatory access control on files and
services to function properly.
First check your status so type sestatus
Then type:
vi /etc/sysconfig/selinux
then you will see
Now press ‘I’ for insert and then go to white line
And type after SELINUX=disabled
Then press esc key and type :wq!
Reboot your OS and then check again by typing sestatus and you will see that
Then type sudo yum update
it will start updates.
Then follow all the procedures from
https://wiki.freepbx.org/display/FOP/Installing+FreePBX+13+on+CentOS+7
then follow
https://www.powerpbx.org/content/asterisk-freepbx-install-guide-centos-v7-asterisk-v13-freepbx-v13