Same Null, Different Cloud

This post will focus on moving a BTRFS file system from loopback file to a mounted BTRFS subvolume on a local file system.
The Scenario
A server has BTRFS as it's root file system and is being used with systemd-nspawn. While this server has been online for several months it was only recently discovered that the containers running on the host were being executed out of a loopback file...

When using BTRFS volumes it's sometimes necessary to move things around. BTRFS has some great tools to assist operators to move volumes and this post will cover one available method.
What is this post about
While the reasons to move a device from one place to another are numerous, this post will focus on moving a BTRFS loopback file to a logical volume in an effort to better confine the containers and improve IOPS. The work for this post originated from...

Adding a WWAN to your laptop may seem like a waste of time, money, and effort. WiFi is just about everywhere and most "smartphones" have hotspot capabilities built into them these days, however, sometimes a modem is just easier, makes more sense for...

If you're running Linux and using systemd then you've likely needed to deal with systemd-journald to stream system logs, or check on the general health of the node. In the course of administering your systemd hosts it's likely you've thought, it sure...