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Here we are going to see how we have set up our master system, we are we are going to implement our

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Apache Web server.

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What are the different configuration settings that we have made?

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And please, if you can yourself implement that lab, then you can skip these videos.

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So we are looking at step by step.

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So we are looking at how we have configure our master server.

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So in this case, what we did, we installed the three VMS and all the three VMS.

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By default, the name of the system was localhost.localdomain.

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And when we were running the DNS domain name, there was no that it was not showing anything.

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So please always remember whenever you are using Linux.

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So the first thing is you have to properly name your system.

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So first we check the hostname and DNS domain, then with the hostnamectl set-hostname command.

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We set the name to master.example.com.

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Then we reboot the system or you can log out also and after log out.

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what we see that Master name was available.

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Then we check with the hostname command.

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That name was, it was showing master.example.com.

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That is what we wanted.

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And when we were running the DNS domain name command it is showing the example.com.

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That is also what we want, that name of the domain name to which our system belongs.

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It should be example.com.

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And then we check initially about our host file.

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And please remember initially no entries there by default localhost entries are there, no entry

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regarding of this master.example.com.

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Then we disabled the firewall by using firewall systemctl disable firewalld command, because

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the two firewall services are there.

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So we did not wanted to use the firewalld, so we disabled it.

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And regarding networking also two services are there, so we disabled this networkmanager service also

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by using systemctl disable command, then because we disabled this, we needed the iptables-services

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to be available.

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So we installed the package yum -q in quiet mode install iptables-services.

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If in your case it is not installed, it will ask for the conformation in our case because it was already

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installed.

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So it said that already installed then we flush the rule and save the rule.

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mean that actually by doing this we were effectively able to disable our firewall.

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That mean firewall was allowing every traffic, every type of traffic, because here in this course.

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we want to concentrate on Apache.

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We do not want our firewall or the other security settings to disallow or in any way disturb our Apache

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server.

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So we have disable this but in production system.

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It is not recommended practice.

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Then we disable the selinux also by changing the value selinux.

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here it was enforcing enforcing.

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to be have change it to disabled.

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And then we check the IP address, one IP address was given to our machine ip a s ens33 192.

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168.142.140.

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And please remember, the network setting was NAT always remember when you have to install certain software

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in VMS, make the setting as NAT because if the Internet is running on your host operating system,

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Internet will run on the your guest machine also in our case, this master VM.

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So,      because we have to install certain packages.

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So we kept it that network adapter.

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  sorry NAT settings later on when we have install the package, we will change it to the bridge.

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Then we check the setting of our ifcfg-ens33 file, how we got that address and please remember

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by default, when we check this file, the bootprotocol is dhcp, that mean our system is obtaining

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the address automatically and no other setting is there, because once you have set the network adapter setting

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to NAT your card LAN card should be set at dhcp that mean it will automatically obtain

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That is why it was obtaining this address.

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Then what we did, we installed the main package that is Apache Web server package by using the command

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yum -q install httpd.

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So it is going to install the package.

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It will ask for the confirmation we will be saying.

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Yes.

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So it will install the package.

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And if it is already installed, then it will give the message it is already installed and you can confirm

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with the rpm -q means query and name of the package whether that package is installed or not.

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So we will see whether our package is installed or not.

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Then we installed for security because we want to implement https.

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Also for that, two packages are required.

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openssl, mod_ssl packages are required for it and we install it by using.

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yum -q install openssl and mod_ssl and if it is not already installed, it will ask for

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the confirmation you have to press y.

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Then it will get installed.

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If it is already installed, you will get this message that these packages are already installed and

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you can confirm with rpm command also rpm query, the name of the package rpm query name of the package.

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Then we install certain tools for checking or downloading certain software.

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So yum -q in quite mode we install wget utility for downloading the packages elinks.

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And Curl Lynx, these are the browser that we are going to use, git is for the if you want to clone

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some repository, it is a utility, tree, again, very useful command for displaying the directory structure.

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So we are going to install these, these we are going to install almost on all the systems on the client

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also.

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So it will again ask for the confirmation and we will press.

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y.

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And if already installed, you're going to get this message.

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And with rpm, you can verify each and every package, whether it is installed or not.

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So then we because we will be giving a little bit introduction about Lamp stack also linux Apache Mysql 

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PHP, so we have installed the mariadb-server also, mariadb-server is same as your mysql server.

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So but in our case, centos or redhat base system.

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They prefer Mariadb server.

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So we are going to install Mariadb-server and again, client package mariadb.

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This is for your database part again it is going to ask for the confirmation.

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We are going to press y and if it is already installed, we will get this message and with the rpm

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again you can verify.

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Then we are going to install php, php-mysql package also, php for installing php and this is

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for connectivity between php and mysql.

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Again, if it is not installed, it will ask for the confirmation we are going to press y.

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And if it is already installed, it is going to give the message.

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After we have install the packages, what we are going to do, we will change our address to the static

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for that purpose in which file you are going to make changes.

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It is going to be ifcfg-ens33 file here, we are going to change the bootprotocol from static

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to sorry, from dynamic to our static.

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In our case, the option was dhcp, so we will change it to static and we will make two entries.

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ipaddress equal to 172.24.0.1 and netmask is this.

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We will change the setting from NAT to bridge and we will say OK, then we will verify that our setting

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network adapter is whether NAT or bridge it is showing it is a bridge.

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And when we are going to run the ip a s ens33, it is showing that we have got the address 172.24.0.

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1 and we are going to make one entry in host file also.

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what will be the entry?

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It will be your 172.24.0.1 IP address of the system, then fully qualified domain name of the system, master

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.example.com then master.

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This is entry that we are going to make.

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So this is how we have set up our master system.

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Let us now verify whether we are having this type of address or not.