this post was submitted on 30 Apr 2025
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Recently in Spain we have suffered a complete power outage, with no electricity for a long time. Some were able to have power on their computers with generators, solar panels, etc. And I know you can have data connectivity with SDR or HAM radio. But my question here is, what are some good self-host/local offline software that we can have and use for when something like this happens. I know kiwix, and some other for manuals. Please feel free to share the ones you know and love, can be for any type of thing as long as it works completely offline, just name it. Of course for GNU/Linux (using Arch myself BTW). Thanks in advance.

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[–] [email protected] 7 points 3 hours ago

There is the kiwix hotspot.

A WiFi hotspot that gives you access to the entire Wikipedia, medical information, homesteading books ...

[–] [email protected] 3 points 3 hours ago

an extreme option could be something like the Varvara / Uxn virtual machine by the Hundred Rabbits collective (created after having to deal with Adobe updates and Xcode updates over a barely functioning cell connection) – emulators are available for all sorts of hardware

blog: Weathering Software Winter | youtube: Weathering Software Winter

[–] [email protected] 2 points 3 hours ago

I haven't heard of kiwix before, that's pretty neat

[–] [email protected] 2 points 4 hours ago* (last edited 4 hours ago)

So... I've done that May 2023 for a holiday trip.

I left with my RPi4 and few gadgets but no Internet.

There I built https://git.benetou.fr/utopiah/offline-octopus/ and my main take away is

  • you can build what is missing

and more importantly the meta take away is

  • you need to iterate preparations

because just like first aid you need to be actually ready when needed and knowledge change over time. You need to actually try though, test your setup and yourself genuinely otherwise it is intellectual masturbation.

Have fun!

[–] [email protected] 3 points 7 hours ago (1 children)

You can download a collection of thousands (maybe a million I don't even know) of books in Spanish in epub format, from the "secret library". It's like a 100Gb torrent, but way worth it.

Ebooks tens to have long lasting battery. I spent a few hours reading on monday.

Just now I'm on my phone, but if you are interested let me know and I'll try to find the link and will mp it to you if you want.

And just now I've been thinking that epubs being so small size maybe there's a way to transmit them over this radio mesh networks on demand, like some sort of radio library. I've have to look into that. Maybe they are too big for that as radio bandwidth for data transfer tends to be incredibly small.

[–] [email protected] 1 points 3 hours ago

i'd love to have those if you don't mind, is it ok for you to send over here? otherwise you have my contact info on my profile. Thanks for the info and is a very good idea indeed

[–] [email protected] 4 points 9 hours ago* (last edited 6 hours ago) (2 children)

You mentioned ham radio


definitely fun! It's a process to get into it though, as you need to study/pass an exam, and then you need a radio. Radios range from cheap ($25 or so) in the VHF/UHF ("walkie talkie"-style) to more expensive for an HF rig ($1000 range for 100W HF). If you want to get into low power ("QRP") it can be much cheaper. You also need a fair amount of space for a good antenna setup...

There are tons of different communication modes, some without a computer and, like you mentioned, some that use computers. wsjtx and fldigi are popular programs.

Good luck!

[–] [email protected] 2 points 9 hours ago (1 children)

thanks, really appreciate all the recommendations here :) i got myself an RTL-SDR because a friend told me about them (didn't arrived yet) definitely gonna check on all that you talk about too

[–] [email protected] 2 points 3 hours ago

(there’s also an older, but still working, protocol called packet radio – does require a bit more technical expertise though)

[–] [email protected] 4 points 10 hours ago (1 children)

https://freifunk.net/

An independent mesh network in Germany.

[–] [email protected] 2 points 10 hours ago (2 children)

does it work in Spain though?

[–] [email protected] 1 points 5 hours ago

There are Spanish equivalents yes

[–] [email protected] 1 points 9 hours ago

Concept and hardware would. Just need >1 nodes

[–] [email protected] 19 points 15 hours ago (4 children)

I have my homeserver rsync three Arch mirrors and three Arch ARM mirrors in rotation on three days every week. Thus I have full local repos for these. All my machines are configured to use this local repo. The reason I do this is precisely to be prepared for the inevitable 'Internet is broken' scenario.

[–] [email protected] 2 points 4 hours ago

total respect

[–] [email protected] 7 points 12 hours ago (1 children)

Since this has seen some interest – here's how much disk space this opulence costs: Arch x86 repository is 113 Gb and Arch ARM is 123 Gb :)

[–] [email protected] 2 points 2 hours ago

That’s actually much smaller than I expected.

[–] [email protected] 14 points 15 hours ago* (last edited 15 hours ago) (1 children)

Yeah, some people don't like to run with full repo mirrors but keep updated copies of the Debian ISO that can be mounted as repositories at any point:

It's essentially the same, but in another format.

[–] [email protected] 3 points 12 hours ago* (last edited 12 hours ago) (2 children)

One can also use a cache to hold deb and rpm files requested by the machines. (Works great when running hundreds of systems.)

I like "apt-cacher-ng". It will do deb and rpm. https://wiki.debian.org/AptCacherNg

https://www.unix-ag.uni-kl.de/~bloch/acng/

Edit: better link

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[–] [email protected] 14 points 15 hours ago (1 children)

There's a whole community for self hosting software.

[email protected]

Hopefully I did that right...

[–] [email protected] 6 points 15 hours ago (1 children)

thanks, will crosspost there. I didn't saw that one

[–] [email protected] 3 points 3 hours ago

also [email protected] (most active) and [email protected] (less active)

[–] [email protected] 12 points 16 hours ago (1 children)

Downloading all of wikipedia for one language is abiut 90GB. Inhave it on a spare drive in case of an outage. That way if I need to research something I can still do.

[–] [email protected] 7 points 15 hours ago (2 children)

Doesn't Kiwix already do this? Or is there any advantage in doing it myself?

[–] [email protected] 4 points 10 hours ago

I guess the advantage would be to have a more updated copy, because the ones on kiwix are one year old.

[–] [email protected] 1 points 10 hours ago (1 children)
[–] [email protected] 3 points 10 hours ago
[–] [email protected] 10 points 16 hours ago (1 children)

You can put together a media server and build a catalogue so you can watch movies and series offline. Maybe not a huge priority in that situation but definitely nice to have.

Jellyfin is a good option for streaming from a media server to other devices. The *arr suite is an option for building the catalogue.

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[–] [email protected] 5 points 15 hours ago (1 children)

Spain? check guifi.net ;)

People had LAN Partys playing video games "offline" in the 90s... Setting up a network is easy, the difficulty comes from scaling up to many nodes, and spreading through the geography (e.g. if you were to use antennas for WLAN, they would need a mostly unobstructed vision) which in urban areas gets tricky.

But those "topology" issues can be flattened, e.g. you can always have a raspberry pi (or any device) acting as server in the corner of a neighborhood. A virtual bulletin board, emails, etc. all could be self-hosted locally there and then people could go grab a coffee and consume the local news just like in the middle ages, but with a screen, digital assets and some healthy amount of trolling :P

[–] [email protected] 1 points 2 hours ago* (last edited 2 hours ago)

i live in a complete rural environment at the top of mountain 'sierra'

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