Notes on web development.

Uberspace is the webhost of my choice for almost all of my web projects.

Setting up a Subdomain

Connect with the your asteroid through SSH and create a directory with the subdomain name:

 mkdir /var/www/virtual/username/sub.domain.com

Then use the uberspace tool to set up the subdomain:

 uberspace web domain add sub.domain.com

Place your files in the newly created directory load them in the browser using the sub domain.

SSH is a useful protocol that allows you to connect to servers. You can use it to automate file synchronisation using rsync.

It requires two components, a private and a public key. To set up SSH with a server, you need to upload the public key to the server and configure your computer to check it agains the local, private key.

Generating a keypair

 ssh-keygen -t ed25519 -a 100 -f ~/.ssh/keyname

Adding a passphrase is not required, but it's more secure. If you do, make sure to store it in a safe location.

Adding the key to the configuration

Create a config file in the .ssh directory:

 touch ~/.ssh/config

Add the following configuration settings to the file:

Host servername

Replace servername with a name that you can remember, change domain.com to the actual domain name as well as username and keyname.

The AddKeysToAgent yes is only necessary if you created a passphrase.

Copying the Public Key to the Server

 ssh-copy-id -i ~/.ssh/keyname.pub servername

Now you should be able to access the webserver with

 ssh servername

If you created a passphrase you will need to enter it when connecting to the server for the first time.

Connect to your server through ssh and enter

 crontab -e

Now you can enter a command to run in the following format:

minute hour day month weekday command

For example:

0 2,18   * /usr/bin/lua /path/script.lua >> /path/script.log 2>&1

Will run the lua script script.lua every day at 2am and 6pm and log it's output to script.log.

incoming(1) | rsync