LINUX File System

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LINUX File System
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Table of Contents
Part 1: Virtual Machine One (Ubuntu) – DNS & SSH Server...................................................2
Part 2: Virtual Machine Two (Fedora) - Web and Database servers........................................5
Part 3: : Remote File Access......................................................................................................6
Part 4: Simple Web Services......................................................................................................8
References................................................................................................................................12

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Part 1: Virtual Machine One (Ubuntu) – DNS & SSH Server
In this part, the first virtual machine is configured to use bind to configure it as a private DNS
virtual server. Here, first the Ubuntu server 18.04 is installed in the VMware virtual machine.
The ip address of the server is chosen by modifying the existing ip address of the VM by
seeing it via ifconfig command. The following steps are performed:
1. Bind is installed via: sudo apt-get install bind9 bind9utils bind9-doc
2. The next step is to configure the bind to set it in ipv4 mode by this command:
sudo nano /etc/default/bind9
And then add "-4" to the end of the OPTIONS parameter. The result is as follows:
OPTIONS="-u bind -4"
3. The next step is to restart bind to implement changes via
sudo systemctl restart bind9

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4. Now it’s time to configure the main DNS server that is VM1. Open the
named.conf.options file using: sudo nano /etc/bind/named.conf.options
5. Create a new ACL block and add the details about the primary IP address and the host
IP address.
6. After creating the ACL block, edit the options block below and add:
options {
directory "/var/cache/bind";
recursion yes; # enables resursive queries
allow-recursion { trusted; }; # allows recursive queries from "trusted"
clients
listen-on { ip address; }; # ns1 private IP address - listen on private
network only
allow-transfer { none; }; # disable zone transfers by default
forwarders {
8.8.8.8;
8.8.4.4;
};
Save the file and exit using CTRL + O and CTRL + X.

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7. Next its time to configure the local file. Open named.conf.local file for edit using:
sudo nano /etc/bind/named.conf.local
Add the following lines in the file:
zone "shekhda.net.au" {
type master;
file "/etc/bind/zones/db.nyc3.example.com"; # zone file path
allow-transfer { ip address; }; # ns2 private IP address - secondary
};
Add these lines too:
zone "128.10.in-addr.arpa" {
type master;
file "/etc/bind/zones/db.10.128"; # 10.128.0.0/16 subnet //assumed
allow-transfer { ip address; }; # ns2 private IP address - secondary
};

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Save the file and exit.
8. Create the forward zone as shown below:
Create this directory by: sudo mkdir /etc/bind/zones
Copy the db file using this command:
sudo cp /etc/bind/db.local /etc/bind/zones/db. shekhda.net.au
Edit the file by opening it via:
sudo nano /etc/bind/zones/ db. shekhda.net.au
Make the necessary changes so that it looks like this:
$TTL 604800
@ IN SOA ns1. shekhda.net.au. admin. shekhda.net.au. (
3 ; Serial
604800 ; Refresh
86400 ; Retry
2419200 ; Expire
604800 ) ; Negative Cache TTL
;
; name servers - NS records
IN NS ns1.nyc3.example.com.