letsencrypt.sh

Trusted SSL certificates used to cost money, but in the past companies like StartCom already started to hand out domain-verified certificates for free, but now we have Let's Encrypt, which takes a different approach.

Replace broken USB-Stick in Ubiquiti EdgeMax routers

In this blog post I'm going to explain how to replace a broken USB-stick in Ubiquiti EdgeMax Routers or in this case the Ubiquiti EdgeMax EdgeRouter-POE. This guide can also be used to recover from a failed firmware update.

First thing you have to do is to get a new …

Hide process list from users

If you have multiple users on a single machine every user can normally see all running processes, their own, other users processes and even system processes. Sometimes people append sensitive data like passwords to a command, and since you can see the process list you'll also get that password, which …

dpkg-divert

Just a short note for myself...

To move a dpkg-managed file out of the way:

dpkg-divert --rename --divert /usr/share/initramfs-tools/dropbear.original /usr/share/initramfs-tools/scripts/init-premount/dropbear

Copy and edit original.

cp /usr/share/initramfs-tools/dropbear.original /usr/share/initramfs-tools/scripts/init-premount/dropbear
ed /usr/share/initramfs-tools/scripts …

Power over Ethernet on Raspberry Pi

I have a few devices that support (passive) power-over-ethernet, and I quite like that as I don't need a power supply for every single device filling up my power strip and I even can mount devices further away where there is no power available.

The Raspberry Pi board normally has …