Changes

You will be learning to perform several different type of CENTOS Linux installs. Lab2 already has an empty table for comparing various Linux installs. You were required in lab1 to record your observation for your '''c7hostcentos1''' installation.

# Open a shell terminal.<br><br>'''WARNING:''' You must perform a '''yum update''' on your '''c7hostcentos1''' machine before proceeding with the next steps.<br><br>

<ol><li value="7">'''Step 4 of 5:''' This next step creates a disk file that will be used to simulate the virtual machine's disk drive. Select a size of '''10 GB'''. Click on<br> '''Select managed or other existing storage''' and type the VM image file pathame:<br> '''/var/lib/libvirt/images/centos2.img''' (make certain that the pathname is correct) and then click '''Forward''' to proceed.</li><li>'''Step 5 of 5:''' Enter the virtual machine name: '''centos2'''. Review the VM information, and click '''Finish'''.<br><br></li><li>'''The virtual machine will now start''' - start timing your installation and making notes for '''centos2''' virtual machine in the installation comparison chart in lab2 logbook. The virtual machine is running from the live disc at this point, and no software has been installed on the ''hard drive'' of the virtual machine. The point of a live disk is to allow you to test the distribution to see whether you like it without installing to the hard-drive first.</li><li>Double-click '''Install to Hard Drive'''. The installation program, similar to the one used when installing CentOS in Lab 1, will appear. You basically perform the same installation operations for this VM including for '''Date & Time''', '''Network & Hostname''', and '''Installation Destination'''. Make certain to use the '''hostname''': '''<u>centos2</u>''' as opposed to ''c7hostcentos1'') for this installation. (with a few slight differences).</li><li>For '''Installation Destination''', select the destination option: '''I will configure partitioning''' and then click '''Done'''. Make certain that the '''Partition Scheme''' is set to '''LVM''' and then click on the link: '''Click to Create Automatically'''. '''Done'''. Check to make certain that the root partition has file system type: '''ext4'''.</li><li>Accept the changes and then click '''Begin Installation'''.<ol type="a"><li>You will be required to make selections very similar to what you did in lab1.</li><li>While the system is installing, take a few minutes to record your observations (including slight differences with centos2 install as opposed to c7host centos1 install).</li><li>When the installation process is complete, note the time required to install this system and record in the installation comparison chart of your lab2 logbook.<br><br></li></ol></li><li>Power-off your Centos7 LIVE system.</li><li>You should notice that the Centos7 boot menu appears. Either press '''ENTER''' to start or wait for it to start automatically.</li><li>Finish the final steps in the setup process (like you did in lab1).</li><li>#You may want to turn off the screen-saver (like you did in Lab1): [http://zenit.senecac.on.ca/wiki/index.php/OPS235_Lab_1_-_CentOS7#Customizing_Your_Account How to Turn-off Screen Saver (lab1)]</li></ol>

# Create the VM (called '''centos3''') as you did with the ''c7hostcentos1'' machine, except for the following differences:<br><br><ol type="a"><li>Select '''Network Installation''' using the installation source URL displayed above.</li><li>When customizing your partitions, do the same operation that you did in centos2, but after automatically creating the partitions, reduce the size of the root LVM partition to '''8000 MB''' and add an LVM partition with a size of '''2000 MB''' (mount point: '''/home''', name: '''home''', and make certain root and /home partitions have '''ext4''' file system).</li><li>Don't forget to install the GNOME desktop here as you will need a GUI for Centos3<br><br></li></ol>

# Repeat the steps as you did to '''start the SSH service''', '''set iptables to accept connections via ssh''', '''test connections between centos3 and c7hostcentos1''', and '''disable SELinux''' (refer to lab1).

# Repeat the steps as you did to '''start the SSH service''', '''set iptables to accept connections via ssh''', '''test connections between centos4 and c7hostcentos1''', and '''disable SELinux''' (refer to lab1).

# Switch to the '''c7hostcentos1''' machine, and open a shell terminal.# Enter these admin commands into your '''c7hostcentos1''' machine and note the result:

<ol><li value="24">A previous OPS235 student graciously created a shell script that you can download and run to check to see how you performed this lab (to see if you are on the right track).<br>Simply issue the command: <b><code><span style="color:#3366CC;font-size:1.2em;">wget http://matrix.senecac.on.ca/~murray.saul/ops235/lab2check2.bash</span></code></b> and run on your '''c7host centos1 machine'''.<br><br>'''If the shell script indicates any major errors, please inform your OPS235 instructor or lab assistant to advise what to do'''.<br><br></li></ol>

Perform the following steps in your c7host centos1 machine:

<ol><li><span style="color:green;font-size:1.5em;">&#x2713;</span> '''<u>All</u> VMs''':<blockquote><ul><li>Working virtual machines '''created''' and '''running'''</li><li>'''Disk layout''' and '''size''' correct on all virtual machines</li><li> Proof of '''yum updates'''</li><li>'''All virtual machines backed-up''' (eg. usb stick and/or home directory)</li></ul></blockquote></li><li><span style="color:green;font-size:1.5em;">&#x2713;</span>'''c7hostcentos1''' machine:<blockquote><ul><li>'''Correct VM image filenames''' contained in '''/var/lib/libvirt/images directory'''</li><li>Creation of your bash shell script called '''backupVM.bash'''</li><li>A list of your '''iptables''' rules (command: '''iptables -L''')</li></ul></blockquote></li><li><span style="color:green;font-size:1.5em;">&#x2713;</span> Lab2 logbook notes and '''Installation Comparison chart''' completed</li></ol>