Unfortuntately, Arch doesn't support the TP-Link TL-WN823N by default, so you have to install the drivers by hand.

If you're using netctl to manage your network connections on Arch and need to connect to a hidden wireless network, make sure that you have Hidden=yes in your config file e.g.

Just a quick guide how to get a Yubikey working on Arch Linux.

After upgrading YouCompleteMe recently, it stopped working. My first thought was that the libraries needed rebuilding:

This is an example of how to connect to a Cisco VPN using netctl on Arch Linux.