As you might know, Ubuntu starting from 19.10 now ships with Chromium as a snap with no option to install it as a deb package. IMO, snap is still not polished enough to become default, having drawbacks like slow app first startup, integration issues sometimes, etc. I hope some …

1. Add Riot repository to your system:
   echo "deb https://riot.im/packages/debian/ $(lsb_release -s -c) main" | sudo tee /etc/apt/sources.list.d/matrix-riot-im.list

2. Import Riot repository signature key:
   curl -L https://riot.im/packages/debian/repo-key.asc | sudo apt-key add -

3. Update repositories database and install Riot:
   sudo …

Server:

• Install:
  sudo apt install shadowsocks-libev
• Restore config from backup if you have one:
  sudo cp -a backup/etc/shadowsocks-libev /etc
  or just:

  sudo tee /etc/shadowsocks-libev/config.json << EOF
  {
      "server":"0.0.0.0",
      "server_port":8388,
      "local_port":1080,
      "password":"<password>",
      "timeout":60,
      "method":"chacha20-ietf-poly1305"
  }
  EOF
  

• Disable server localhost access …

This might be useful to connect e.g. Windows XP to ZeroTier network or other machines which you can't or don't want to install ZeroTier client to.

1. Create ZeroTier network in control panel and join it on your host

2. Allow Ethernet bridging for your host in control panel

   

3. In VM …

By default Akonadi uses MySQL and lots of agents, so total memory usage could be ~300-400MB right from the start. If you don't need all of its capabilities, there is a way to make it use less memory.

1. Replace MySQL with SQLite:
   • sudo apt install akonadi-backend-sqlite
   • sed -i 's/^Driver …

UPD: Just use ZeroTier — open source, cross-platform, secure and easy to use virtual LAN. Add your remote computers to a virtual network and connect to them as if they are in the same LAN. Connections are end-to-end encrypted and P2P, so you always get the best speed and latency possible …

This one is similar to persistent local SSH server forwarding setup (although much more simple). Preparation part is exactly the same, so if you've already done that, you may skip it and go straight to persistent SSH proxy configuration.

After each file and command there will be a location label …

SSH keys come in pairs: a public and a private key. It might be easier to think of them as a lock (public part) and key (private part). You add public key (lock) to the computer you want to connect to, and then you can connect from elswhere and unlock …

1. Create user: sudo adduser support
2. Let user execute commands as root: sudo adduser support sudo
3. Switch to new user: sudo su support
4. Set up user avatar:
   • Get avatar: cd; wget https://shevchuk.co/cog.png
   • Move it where system expects it: mv cog.png ~/.face
   • Make AccountsService aware of it …

UPD 2017.11.02: Official standalone Signal Desktop is released!
Install official Signal Desktop, old version and this installer using it should now be considered deprecated.

UPD 2017.08.14: There is now an easier way with automatic Signal Desktop installer, which also keeps Signal auto updated.

This guide is …