Add wiki page about ssh

ssh.md

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+# ssh
+
+`ssh` is what sets ttylde apart from other social networks. you connect *directly to another computer's console* instead of connecting via aa web page or a mobile app.
+
+Before the days of the world-wide-web, this is how all computer work got done.
+
+People used to use a tool called [`telnet`](https://en.wikipedia.org/wiki/telnet) for this purpose. Nowadays, we use `ssh`.
+
+___
+
+# How to make an ssh key
+
+This method will create two keys: a public and a private key. This is a method of encryption called [public key encryption](https://en.wikipedia.org/wiki/Public-key_cryptography).
+
+Make sure to *always* keep your private key private! Otherwise, bad people can do bad things while pretending to be you.
+
+___
+
+If you have any questions, be sure to ask on IRC! The channel is `#ttylde`.
+
+See [the wiki page on IRC](https://ttylde.karx.xyz/wiki.php?page=irc) for more info.
+___
+
+## Generating the keypair
+
+1. Open your terminal
+2. Create your .ssh directory if it doesn't exist:
+
+```bash
+mkdir -m 700 ~/.ssh
+```
+3. Create your keys:
+
+```bash
+ssh-keygen -t ed25519 -a 100
+```
+- If you accept the defaults, your public key and private key will be located at `~/.ssh/id_ed25519.pub` and `~/.ssh/id_ed25519`, respectively.
+- Paste the contents of your public key file into the SSH Key field on the signup form
+
+## Using the keypair
+
+Once an admin approves your application, simply run the following command to connect:
+
+```bash
+ssh -i ~/.ssh/your_key_file username@ttylde.karx.xyz
+```
+
+where `username` is your username (~karx would use `karx@ttylde.karx.xyz`)
+
+___
+
+### Using ssh on legacy windows
+
+Older versions of windows do not come with ssh preinstalled, and you will need to install a third party tool. Below are some recommendations:
+
+- [Windows subsystem for Linux](https://docs.microsoft.com/en-us/windows/wsl/install-win10)
+- [msys2](http://www.msys2.org/)
+- [git bash](https://git-scm.com/)
+
+After this, follow the instructions above.