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-<td class="org-left"><a href="#org43e0c78">What the system can do</a></td>
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+<td class="org-left"><a href="#orgfbb39f8">What the system can do</a></td>
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<td class="org-left">-</td>
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-<td class="org-left"><a href="#orgc0a9800">Disk Images</a></td>
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+<td class="org-left"><a href="#org8e9fd5b">Disk Images</a></td>
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<td class="org-left">-</td>
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-<td class="org-left"><a href="#org1942f83">Building Disk Images</a></td>
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-<td class="org-left"><a href="#org4ff9ff2">How to use it</a></td>
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Mesh networks are useful as a quick way to make a fully decentralised communications system which is not connected to or reliant upon the internet. Think festivals, hacker conferences, onboard ships at sea, disaster/war zones, small business internal office communications, protests, remote areas of the world, temporary "digital blackouts", scientific expeditions and off-world space colonies. The down side is that you can't access any internet content. The upside is that you can securely communicate with anyone on the local mesh. No ISPs. No payments or subscriptions beyond the cost of obtaining the hardware. Systems need to be within wifi range of each other for the mesh to be created. It can be an ultra-convenient way to do purely local communications.
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+<h2 id="orgfbb39f8">What the system can do</h2>
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<ul class="org-ul">
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<li>Discovery of other users on the network</li>
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<li>Text based chat, one-to-one and in groups</li>
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<li>Private communications is end-to-end secured and forward secret.</li>
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<li>Publicly shared data is <i>content addressable</i> and therefore scalable to many peers.</li>
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+This system should be quite scalable. Both qTox and IPFS are based upon distributed hash tables (DHT) so that each peer does not need to store the full index of data for the entire network. Caching or pinning of IPFS data and its content addressability means that if a file or blog becomes popular then performance should improve as the number of downloads increases, which is the opposite of the client/server paradigm.
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+<h3 id="orgf22242f">Router images</h3>
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Routers are intended to build network coverage for an area using small and low cost hardware. You can bolt them to walls or leave them on window ledges. They don't have any user interface and their only job is to haul network traffic across the mesh. Copy the image to a microSD card and insert it into the router, plug in an Atheros wifi dongle and power on. That should be all you need to do.
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+<h4 id="org3a2b775">Beaglebone Black</h4>
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It's better not to trust images downloaded from random places on the interwebs. Chances are that unless you are in the web of trust of the above GPG signatures then they don't mean very much to you. If you actually want something trustworthy then build the images from scratch. It will take some time. Here's how to do it.
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When you first boot from the USB drive the system will create some encryption keys, assign a unique network address to the system and then reboot itself. When that's done you should see a prompt asking for a username. This username just makes it easy for others to initially find you on the mesh and will appear in the list of users.
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On the ordinary internet the date and time of your system would be set automatically via NTP or TLSdate. But this is not the internet and so you will need to manually ensure that your date and time settings are correct. You might need to periodically do this if your clock drifts. It's not essential that the time on your system be highly accurate, but if it drifts too far or goes back to epoch then things could become a little confusing in regard to the order of blog posts.
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Ensure that you're within wifi range of at least one other mesh peer (could be a router or client) and then you should see that the <i>Chat</i> and <i>Other Users</i> icons appear. Select the users icon and you should see a list of users on the mesh. Select the <i>Chat</i> icon and once you are connected you should see the status light turn green. If after a few minutes you don't get the green status light then try closing and re-opening the Tox chat application. Select the plus button to add a friend and then copy and paste in a Tox ID from the users list.
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You can make files publicly available on the network simply by dragging and dropping them into the <i>Public</i> folder on the desktop. To view the files belonging to another user select the desktop icon called <i>Visit a site</i> and enter the username or Tox ID of the other user.
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To create a blog post select the <i>Blog</i> icon on the desktop and then use the up and down cursor keys, space bar and enter key to add a new entry. Edit the title of the entry and add your text. You can also include photos if you wish - just copy them to the <b>CreateBlog/content/images</b> directory and then link to them as shown.
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Bob Mottram
8 年之前