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I could have used an alias e.g. I am CCIE #50038 and am a Network Automation envalgelist. Most systems have a single default entry for the local host being mapped to the 127.0.0.1 loopback address. Status.

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Design Pattern, Infrastructure On a Linux or Unix network the host name is purely optional but useful and so it is normal to give each computer/device a name. Learn from my mistakes on how to survive studying and preparing for the Lab Exam. Dom In the example above CSR-1 is defined without the ansible_host command.

Please note that DISQUS operates this forum.

If you develop websites, setup local networks etc then you will find the hosts file very useful.

However it is important to note the hosts file doesn’t have a file extension like .txt. The Hosts file contains lines of text consisting of an IP address in the first text field followed by one or more host names. In the above example we have the same inventory file but in a YAML format. Kazakh / Қазақша This is usually due to the fact that they have some very simple, but specific requirements, for them to work at all.

Now if I address a Playbook to run against LAB it will affect all devices in this inventory.

In the above example you can see I have grouped the devies into two groups denoted with square brackets. Data Type See understanding the name resolution process. Chinese Simplified / 简体中文 Well, this was all about locating, editing and managing your system’s hosts file in Windows 10. You can have multiple inventories and specify to use each inventory at the playbook runtime. Note: All computer names on a windows network must be unique. What I suggest is to delete the default hosts file and create your own. This is known as the name resolution process. In an age where DNS dominates your network both locally and throughout the Internet, these two files are seldom ever used, but they can be very useful in a few situations.

Below is a sample hosts file: Select Text Documents (*txt) in the bottom-right of the Open window and change it to All Files.

Function The primary use today for an LMHosts file, is for name resolution over a VPN.



On a windows network all machines have a name (computer or host name), and an address (IP Address). Change ).

This is done by simply entering the website address and substituting the IP address with the localhost IP address such as: 127.0.0.1 www.unwantedsite.com#advertising site. Hebrew / עברית On Linux systems the hosts file is located in /etc directory.

I have done so in hopes that it may be helpful to some folk, and also it will be useful in and upcoming post regarding Hyper-V configuration and management. # # This file contains the mappings of IP addresses to host names. Italian / Italiano DataBase Important Note: The HOSTS file now contains a change in the prefix in the HOSTS entries to "0.0.0.0" instead of the usual "127.0.0.1". In this example we will block Facebook. Swedish / Svenska The domain name used is the NetBIOS name, not the FQDN. In addition, you may not be able to save it unless you have opened it as an administrator.

Javascript The host name can be used instead of the computer IP address by using the hosts file to map the name to an IP address. Now that you have edited your Hosts file make sure to save it. If you find this last step tedious, the University Of Sait Louis has a little Java script that will create these two lines for you: http://bflinux.slu.edu/LSI/tools/lmhosts.html. Search in IBM Knowledge Center.

The lines starting with # are comments and are ignored.



On windows XP,windows 7 the hosts file is located in c:\windows\system32\drivers\etc\.

Some viruses will target the host file as it is an easy way of getting unsuspecting users to rogue websites.. A- A host name is used on local networks without DNS and is the name assigned to a computer. Time

The file can also be static or created dynamically by a script.

If you want to put a comment next to any item in your Ansible Hosts file just start a new line with a #, For more information you can reference the Ansible Best Practice guide on the Ansible Documentation site here: https://docs.ansible.com/ansible/latest/user_guide/playbooks_best_practices.html. Data Processing

which covers the main points above. http://bflinux.slu.edu/LSI/tools/lmhosts.html, Configuring Hyper-V Core « LAN-Tech Network Management, https://blog.lan-tech.ca/2012/04/26/hosts-and-lmhosts-files/. Norwegian / Norsk If you cat the file you can see it does not contain any entries (they are all commented out) but what it does do is give you a template of how to start formatting your inventory file. 192.168.100.10 “YOUR-DOMAIN x1b” #PRE. Two types of lines are permitted: Empty Lines; Host name definitions; Lines may be intermingled as needed. See this article. Hungarian / Magyar Copyright © 2020 Roger Perkin.

When you enter a network name into a browser bar,command line etc as shown in the simple ping command line below: The computer must first resolve this name into an IP address.

Any host that is not listed cannot be accessed.

Relation (Table) Simply create another inventory file i.e hosts-2 and at playbook runtime use the -i flag to tell Ansible to use that inventory e.g.

Browser The Hosts file today seems to be more used for blocking unwanted web sites.

Search Be careful if using a text editor like NotePad as it will add a .txt file extension to the name. I'm Roger, a UK based network consultant currently working for a Cisco Gold Partner. Slovenian / Slovenščina Though rare, there still is an occational need or advantage to using Hosts and LMHosts files. Dutch / Nederlands Change ), You are commenting using your Facebook account. Google and achieved the same result.. Versioning

This step is required because the HOSTS file doesn't have the.TXT file extension.

Czech / Čeština

Spanish / Español For example, if you have a web server with the local IP address 192.168.0.5 that hosts websites for company.com and organization.org, you can add the following lines to your local computer’s hosts file: 192.168.0.5 company.com192.168.0.5 organization.org

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(adsbygoogle = window.adsbygoogle || []).push({}); Before we look at the host file itself it is important to understand host names.

To clear the NetBIOS cache ( and PREload), at a command line enter (R is case sensitive): To clear the DNS cache, at a command line enter: For the record, the Hosts file can also be used for IPv6 addressing. Polish / polski Before we look at the host file itself it is important to understand host names.On a windows network all machines have a name (computer or host name), and an address (IP Address)On a windows network the computer name is also called the host name.The computer name is assigned at install, but can be changed later (click on start menu and right click my computer>computer name>change).To make using it easier make it something meaningful and short.

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Each group contains some devices and in this instance the devices are defined by name and then the IP address is defined manually using the ansible_host= command.

You can create an inventory file in Ansible anywhere you like.

In the screen shot above my hosts file didn’t have an entry for Google.com and so the system used DNS to resolve the name.

Keep in mind when editing these files you can run into conflicts, or ineffective changes if you do not reboot or purge the local name caches. I personally create a custom ansible inventory file within each project folder I create, I also then create a custom ansbile.cfg file within that same folder that references your custom host file.
The Hosts file is used by the operating system to map human-friendly hostnames to numerical Internet Protocol (IP) addresses which identify and locate a host in an IP network. Bosnian / Bosanski What is the hosts file? If the Hosts file is …

I hope you found this short tutorial informative and if you want to keep learning check out these other Ansible posts, Hi I'm Roger. I could have used an alias e.g.
And use Comments to let me know more, understanding the name resolution process. Cube

By editing the hosts files, you can achieve the following things: 1. Slovak / Slovenčina

All options will be covered in this tutorial below.

Always use uppercase to be safe. Css Data Concurrency, Data Science

Lexical Parser Data Quality

Selector The Ansible inventory file name can be anything you want as long as you reference it in the ansible.cfg file. and What is it used for?–.

To find the host name of a machine type the command hostname and a command prompt. There are options to define connection parameters: ansible_host is the hostname or IP address, ansible_port is the port the machine uses for SSH, ansible_user is the remote user to connect as, ansible_ssh_pass if using a password to SSH, ansible_ssh_private_key_file if you need to use multiple keys that are specific to hosts.

I use WS1 (workstation 1) etc. Vista for example includes the IPV6 localhost entry, by default: DNS, Networking, RRAS/VPN, Uncategorized, VPN, […] (Note: it is very important hit return, after every entry including the last line, and then save. It looks like this ws1. Html If you are planning on using this file it needs to be saved without a file extension – lmhosts. The Hosts file, used for DNS name resolution, and the LMHosts.sam file used for NetBIOS name resolution.

Arabic / عربية

android) etc and can be very useful for testing purposes.

Notice that this time the entry in the hosts file is used and, Please rate? In the example above I used the fully qualified domain name (FQDN) of www.google.com..

The hosts file is used as part of the name resolver process, and is usually the first option. Discrete

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If DNS is configured on the host and client machines there should be no need of static text files for resolving names, but it does work well, and many folks uses them as a dependable simple solution.

Handle an attack or resolve a prank 3.

Here is the basic default host file taken from my PC. The safest method is to save the file using quotes, “lmhosts” to assure no extensions are added.

Portuguese/Brazil/Brazil / Português/Brasil
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