There are many ways to show btrfs, zfs, and ext4/3 filesystem disk info in Linux and Unix. Here are a few of the most common commands for developers and sysadmins to find out their hard disk size using the CLI https://www.cyberciti.biz/faq/howto-find-out-or-learn-harddisk-size-in-linux-or-unix/ #linux #freebsd #unix #debian #ubuntu #fedora #sysadmin