Copy-on-write makes snapshots fast and accessible, but deleting them to reclaim disk space can be a bit confusing. Let’s have a quick primer on how those work, and look at a small utility to help reason about it.

zsnapfree is a TUI for showing how much space can be reclaimed by freeing zfs snapshots. It is a TUI wrapper over the standard zfs tool.

If you just want to see zsnapfree in action, skip to the screencast.

Rebooting a modern desktop computer really shouldn’t take very long, so when it was somewhat-regularly taking well over 10 minutes just to shut down, I got curious, and ended up looking at netdata, jitter, anacron, and even ansible.

Figuring out what’s taking up space is a well-known issue, with a variety of great tools for it… if we’re talking about files on a local hard drive.

Let’s make a tiny display for stuff you check right before leaving home!