LightwaveRF Link and pfSense - How I fixed the flashing red light problem

Configuring PAM for SSHd to use either a YubiKey or Google Authenticator for two factor authentication

openssl s_server kept exiting without actually binding to a port while I was testing, and I figured out why

Using proxy_command to SSH into hosts via a jump/gateway first.

How I pranked a work mate with an evil little while true loop.

Need to sniff network traffic/pcaps for HEX patterns? Here’s an easy way to do it

Wish you could SSH to a host/IP just by typing/pasting it? This command not found handler will let you SSH without typing ssh!

LetsEncrypt net::err_cert_authority_invalid solution

This is a handy way of iterating over variable names and their values in BASH by way of variable dereferencing.

Sometimes you need a little more detail when debugging a bash script than bash -x alone will give you. The following modifies PS4 to contain the line number of each line of output.