Balance data block groups which are less than 15% utilized, running the operation in the background

Balance block groups on a btrfs filesystem.
More information: <https://btrfs.readthedocs.io/en/latest/btrfs-balance.html>.
Trick copyright: tl;dr; <https://github.com/tldr-pages/tldr>

sudo btrfs balance start --bg -dusage={{15}} {{path/to/btrfs_filesystem}}

click the source code to copy install btrfs balance on any operating system with command-not-found.com