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OPS335 Installation Lab

746 bytes removed, 16:12, 8 January 2019
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Replacing deprecated command with current one.
==INVESTIGATION 1: HOST INSTALLATION==
=== Installation instructions for Centos CentOS 7 ===# It may be advisable to obtain a <u>newer version</u> of the Centos CentOS 7 Full Installation DVD since there may be improvements since the last version from when you took OPS235.<br><br># Download and burn on a DVD a copy of the Centos CentOS 7 installation DVD (64 bit edition) from the Centos CentOS web site or the Belmont server.<br>'''Note:''' we'll be using the 64 bit version of Centos CentOS because all of our lab computers are equiped equipped with Intel 64 bit mainboards and CPUs, and any computer you bought in the last few years for yourself will be 64bit as well.<br><br>#* '''Seneca's mirror of CentosCentOS:''' httphttps://belmontmirror.senecacollege.ca/pub/centos/7/isos/x86_64/CentOS-7-x86_64-DVD-18041810.iso<br>This is very fast, but is only accessible from within Seneca's network - you can't access this from home. You can burn this disc on the machines in the Open Lab.)<br><br>#* '''Outside Seneca College link (available from any Internet connection):<br>''' http://mirror.csclubnetflash.uwaterloo.canet/centos/7/isos/x86_64/CentOS-7-x86_64-DVD-18041810.iso<br /><br>
# You need to refer to your OPS235 notes in order to install your host machine.<br>Here is a direct link:<br> [https://wiki.cdot.senecacollege.ca/wiki/OPS235_Lab_1_-_CentOS7_-_SSD2 OPS235 - Lab1]
{{Admon/tip |Boot order|Some of our machines' boot order is configured to be Harddrive first, DVD second. Which means you won't be able to boot from the DVD if you already have an operating system installed on your drive.}}
# In the current version of CentOS the first time you boot your system a graphical licence prompt comes up.<br><br>
{{Admon/important |License Prompt for Older Centos7 versions|It is recommended that you use the current Centos7 version (links provided in this lab). Older Centos7 versions may require a user to accept the license agreement from a shell prompt. Below is the following instructions to enter from the command prompt:<br>'''1''' ''ENTER''<br>'''2''' ''ENTER''<br>'''c''' ''ENTER''<br>'''c''' ''ENTER''}}
<ol><li value="2">Log in and check that you have access to the internet. If you don't - you need to get the network interface to come up on boot. Edit '''/etc/sysconfig/network-scripts/ifcfg-eno1''' (the name of the interface may be different) and change '''onboot''' to '''yes'''.<ul><li>You can then use the '''ifup'''/'''ifdown''' commands to reset your network configuration or you can just reboot.</li></ul></li><li>Make certain that '''SELinux''' is '''enforcing''' for security reasons (this should be the default). To make it ''enforcing'', simply edit the '''/etc/selinux/config''' file and follow the instructions inside.</li><li>Install all updates using the '''yum update''' command.</li></ol>
<br>
 
{{Admon/important |Yum Update Hangs|If you experience yum update "hanging" around item 689 of over 1200 packages, issue the following commands:<br><source>pkill systemctl
yum clean all
yum update
</source>'''NOTE:''' Do NOT press '''&lt;ctrl&gt;c''' since it may cause your machine to cause a kernel panic when you restart your machine.}}
===Using iptables===
First, It is a good idea to make certain that your host machine has been set up correctly prior to creating your first virtual machine:
#Open a separate terminal and issue the '''ifconfigip address show''' command on your host machine to know your physical network and your virtual network. Note this information for the next few steps.
#Issue the following command to download Bash shell script to check your host machine's set-up prior to proceeding with this lab:<br>'''wget http://matrix.senecac.on.ca/~murray.saul/ops335/labcheck_install.sh'''<br>
#Assign execute permissions, and run the script to check your work:<br>
'''labcheck_install.sh'''
<ol><li value="4">Use the information from the '''ifconfigip address show''' command to correctly specify the '''physical network interface''' and the '''virtual network interface'''.</li></ol>
'''NOTE:''' You will need an ISO file for CentOS 7 (the same one you burned your DVD from). It is recommended to use the command:<br> '''<span style="text-decoration:none;color:blue;">wget
httphttps://mirror.senecacollege.ca/centos/7.5.1804/isos/x86_64/CentOS-7-x86_64-DVD-18041810.iso</span>'''<br>to download this image onto your host machine. In this way, you can keep it on your host machine for the remainder of this course in case you need it.
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