sudo apt-add-repository ppa:i2p-maintainers/i2p
sudo apt-get update
sudo apt-get install i2p
but then when I ran:
i2prouter start
it fails with:
Starting I2P Service...
Removed stale pid file: /home/ciro/.i2p/i2p.pid
Waiting for I2P Service.....
WARNING: I2P Service may have failed to start.
It does not come with a default browser... A popular option seems to be to install a praivate browser such as LibreWolf (Firefox based) to be your I2P thing www.youtube.com/watch?v=qFE1J9YhhWg Setting it up as such makes it not work as a regular clearnet browser. Instructions at: librewolf.net/installation/debian/
sudo apt update && sudo apt install extrepo -y
sudo extrepo enable librewolf && sudo extrepo update librewolf
sudo apt update && sudo apt install librewolf -y
Then go to Proxy settings and set Manual proxy configuration:
  • HTTP Proxy: 127.0.0.1:4444
  • SOCKS Host: 127.0.0.1:4447
Another setting you really want in LibreWolf is:
Don't enable HTTPS-Only Mode
otherwise it keeps complaining every time that pages are not https, because they are all http, because the security is happening at a lower layer of the protocol already.
Then I can visit the sample website tracker2.postman.i2p. It complains that it's not https, but I say, OK, I think I'm already mega encrypted figers crossed. It is a simple oldschool forum like phpBB where people announce their I2P compatible Torrents. From the posts I can copy a Magnet link and add it to 127.0.0.1:7657/i2psnark/, the built-in Torrent thing, the only convenient thing they have pre-setup for you :-)
Shame setting up this project is so difficult, it can never reach mainstream like this. Tor Browser and centralized VPN are so much more streamlined. But if it were mainstream, it would be boring? Early 200ss vibes come to mind.
On Ubuntu 26.04, visiting i2p.net/en/downloads/ recommended me to download files.i2p.net/2.12.0/i2pinstall_2.12.0.jar so I did:
cd ~
wget https://files.i2p.net/2.12.0/i2pinstall_2.12.0.jar
sudo apt install openjdk-17-jre
JAVA_HOME=/usr/lib/jvm/java-17-openjdk-amd64 PATH="$JAVA_HOME/bin:$PATH" java -jar ./i2pinstall_2.12.0.jar -console
Then after some clicking faff
cd ~/i2p
JAVA_HOME=/usr/lib/jvm/java-17-openjdk-amd64 PATH="$JAVA_HOME/bin:$PATH" ./i2prouter start
and it told me:
Starting I2P Service...
Waiting for I2P Service....
running: PID:423806
and it automatically opened up a Chrome tab at: 127.0.0.1:7657/welcome
The default Java 8 installed on my machine is too old, needed 17 or above. Very annoying.
To make things more bearable I added this to my .bashrc:
i2p() (
  cd ~/i2p
  JAVA_HOME=/usr/lib/jvm/java-17-openjdk-amd64 PATH="$JAVA_HOME/bin:$PATH" ./i2prouter "$@"
)
so I can just:
i2p start
i2p stop
Got this error on a new Motorola Moto G15... Play certified, did all updates. Related threads:
After a few "install all updates" + "reinstall authy" + "try to update Play Store (though nothing seems to have actually happened) + "reboot" it suddenly started working for me.
I2P by Ciro Santilli 40 2026-08-07
Seems very similar to Tor, but also supports anonymous sharing of large files, notably via BitTorrent, which Tor does not support well. Shame.
We use Settlement as a generic term for city or town or village but without specifying its size.
Ciro Santilli's hardware / Sony XPERIA by Ciro Santilli 40 Created 2026-08-07 Updated 2026-08-17
Not sure when I bought it exactly, but I had it as early as 2015.
Possibly Sony XPERIA Z1: www.gsmarena.com/sony_xperia_z1-5596.php based on camera markings G 1/2.3 20.7MP
2026: not registering touches very well, I can't even properly try to guess the unlock pattern. Need to try with mouse.
Motorola Moto G15 4G 4GB-128GB Gris (Gravity Grey) Dual SIM
Bought 2026 as the cheapest 100 pound phone available now that I don't have any Authy backup I think in case my phone breaks. That's the only purpose.
First impression: sluggish! Epic.

Pinned article: Introduction to the OurBigBook Project

Welcome to the OurBigBook Project! Our goal is to create the perfect publishing platform for STEM subjects, and get university-level students to write the best free STEM tutorials ever.
Everyone is welcome to create an account and play with the site: ourbigbook.com/go/register. We belive that students themselves can write amazing tutorials, but teachers are welcome too. You can write about anything you want, it doesn't have to be STEM or even educational. Silly test content is very welcome and you won't be penalized in any way. Just keep it legal!
We have two killer features:
  1. topics: topics group articles by different users with the same title, e.g. here is the topic for the "Fundamental Theorem of Calculus" ourbigbook.com/go/topic/fundamental-theorem-of-calculus
    Articles of different users are sorted by upvote within each article page. This feature is a bit like:
    • a Wikipedia where each user can have their own version of each article
    • a Q&A website like Stack Overflow, where multiple people can give their views on a given topic, and the best ones are sorted by upvote. Except you don't need to wait for someone to ask first, and any topic goes, no matter how narrow or broad
    This feature makes it possible for readers to find better explanations of any topic created by other writers. And it allows writers to create an explanation in a place that readers might actually find it.
    Figure 1.
    Screenshot of the "Derivative" topic page
    . View it live at: ourbigbook.com/go/topic/derivative
  2. local editing: you can store all your personal knowledge base content locally in a plaintext markup format that can be edited locally and published either:
    This way you can be sure that even if OurBigBook.com were to go down one day (which we have no plans to do as it is quite cheap to host!), your content will still be perfectly readable as a static site.
    Figure 2.
    You can publish local OurBigBook lightweight markup files to either https://OurBigBook.com or as a static website
    .
    Figure 3.
    Visual Studio Code extension installation
    .
    Figure 4.
    Visual Studio Code extension tree navigation
    .
    Figure 5.
    Web editor
    . You can also edit articles on the Web editor without installing anything locally.
    Video 3.
    Edit locally and publish demo
    . Source. This shows editing OurBigBook Markup and publishing it using the Visual Studio Code extension.
    Video 4.
    OurBigBook Visual Studio Code extension editing and navigation demo
    . Source.
  3. https://raw.githubusercontent.com/ourbigbook/ourbigbook-media/master/feature/x/hilbert-space-arrow.png
  4. Infinitely deep tables of contents:
    Figure 6.
    Dynamic article tree with infinitely deep table of contents
    .
    Descendant pages can also show up as toplevel e.g.: ourbigbook.com/cirosantilli/chordate-subclade
All our software is open source and hosted at: github.com/ourbigbook/ourbigbook
Further documentation can be found at: docs.ourbigbook.com
Feel free to reach our to us for any help or suggestions: docs.ourbigbook.com/#contact