Some of my ZFS pools referred to sda, sdb, sdc, sdd, sde etc which can change at boot especially if SATA ports are swapped. I’ve struggled to find a definitive answer for whether ZFS is storing more permanent GUIDs or… Read More
Setting up NUT for HP T700h UPS on Raspberry Pi
HP T700h UPS has a serial port. I’m using a USB to RS232 cable/dongle that comes up as /dev/ttyUSB0. First install nut. Next, enable standalone mode in /etc/nut/nut.conf Define the UPS. I’ve called it “hp” but you can give any… Read More
X not working for root via sudo
To install the virtualbox extension pack on a headless machine, I needed to run the virtualbox gui app as root via sudo. This did not pass authentication through and X11 failed. Solution was found at the link below. X11 connection… Read More
Choppy Airplay with Cambium cnPilot E400 Wifi
TLDR: Disable OCS Problem symptoms Yesterday I experienced very choppy Airplay performance from my MacBook Pro. The video would periodically freeze and the audio drop out. Every few seconds there would be a noticeable gap in the audio and the… Read More
Getting Virtualbox shared folders to automount in linux guests
Some of these steps are easily forgotten, leading to no shared folders automatically mounting. The process to debug this can be a hassle, and there are far too many workaround mount methods on the net, including manual fstab entries etc,… Read More
Chromecast and AirPlay with Client Isolation
For security, it is often be desirable to enable client isolation, particularly on a guest wifi, to prevent untrusted devices from communicating with each other. Unfortunately this is an all or nothing approach – unless using ACLs as a pseudo… Read More
Edgerouter Lite 3 Failing to boot
After a attempting to update the firmware in the usual manner, my Edgerouter Lite 3 failed to boot. This turned out to be due to a failure of the internal flash memory, which I have since found out is a… Read More
Windows 10 won’t boot up in virtualbox after major update
Windows 10 installed a major update automatically. In this case it was the anniversary update from a year ago. After updating, it got stuck during boot on a spinning circle. Very simple fix – shutdown all VMs, then update virtual… Read More
Upgrading M.2 SSD with only one slot
I upgraded a laptop’s M.2 SSD to a larger one, but the (Gigabyte) laptop only had one slot. In Windows 10, hold SHIFT when clicking shutdown to perform full shutdown rather than fast shutdown. Use a live USB of CloneZilla… Read More
Gracefully shutting down another user’s Virtualbox VMs
I was having issues shutting down another user’s Virtualbox virtual machines. Specifically, my virtual machines run as a particular user, but my UPS software’s shutdown script runs as root. Root cannot find any VMs registered to it. I combined instructions… Read More