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=== Part 1: Using /etc/host File for Local Hostname Resolution ==={| width="40%" align="right" cellpadding="10"|- valign="top"|{{Admon/note | Hosts files vs. the Domain Name System | On large public networks like the Internet or even large private networks we use a network service called [http://en.wikipedia.org/wiki/Domain_Name_System Domain Name System (DNS)] to resolve the human friendly hostnames like '''centos.org''' to the numeric addresses used by the IP protocol. On smaller networks we can use the <code>/etc/hosts</code> on each system to resolve names to addresses.}}|} After setting up a private network, it can be hard to try to remember IP addresses. In this section, we will setup your network to associate easy-to-remember server names with IP ADDRESSES. # Complete this investigation on '''all of your VMs''' and the '''c7host''' machine.# Use the <b><code><span style="color:#3366CC;font-size:1.2em;">hostname</span></code></b> and <b><code><span style="color:#3366CC;font-size:1.2em;">ifconfig</span></code></b> commands on your c7host machine and all of your 3 VM's to gather the information needed to configure the '''/etc/hosts''' file on all of your Linux systems.# Edit the '''/etc/hosts''' file on <u>each</u> of the '''virtual machines and host machine'''. Add the following contents to the <u>bottom</u> of the '''/etc/hosts''' file:<br><br>#::192.168.235.1 c7host#::192.168.235.11 centos1#::192.168.235.12 centos2#::192.168.235.13 centos3<br><br>#Confirm that each host can ping all three of the other hosts by name. ===Part 2: Using Arrays to Collect VM Network Information===
{|width="40%" align="right" cellpadding="10"
|- valign="top"
#Change to the /root/bin directory.
#Using a text editor, create a Bash shell script called network-info.bash and enter the following content below:<br><br>x<br><br>
#Give this shell script execute permission for the owner.#Run the shell script.#View the contents of the output file to confirm that the shell script worked correctly.
=== Part 2: Using /etc/host File for Local Hostname Resolution ===
{| width="40%" align="right" cellpadding="10"
|- valign="top"
|{{Admon/note | Hosts files vs. the Domain Name System | On large public networks like the Internet or even large private networks we use a network service called [http://en.wikipedia.org/wiki/Domain_Name_System Domain Name System (DNS)] to resolve the human friendly hostnames like '''centos.org''' to the numeric addresses used by the IP protocol. On smaller networks we can use the <code>/etc/hosts</code> on each system to resolve names to addresses.}}
|}
After setting up a private network, it can be hard to try to remember IP addresses. In this section, we will setup your network to associate easy-to-remember server names with IP ADDRESSES.
# Complete this investigation on '''all of your VMs''' and the '''c7host''' machine.
# Use the <b><code><span style="color:#3366CC;font-size:1.2em;">hostname</span></code></b> and <b><code><span style="color:#3366CC;font-size:1.2em;">ifconfig</span></code></b> commands on your c7host machine and all of your 3 VM's to gather the information needed to configure the '''/etc/hosts''' file on all of your Linux systems.
# Edit the '''/etc/hosts''' file on <u>each</u> of the '''virtual machines and host machine'''. Add the following contents to the <u>bottom</u> of the '''/etc/hosts''' file:<br><br>
#::192.168.235.1 c7host
#::192.168.235.11 centos1
#::192.168.235.12 centos2
#::192.168.235.13 centos3<br><br>
#Confirm that each host can ping all three of the other hosts by name.
