TLDR
Enter a command. For example: ipcalc, slapt get, eject, grub install.

btrfs

 
A filesystem based on the copy-on-write (COW) principle for Linux. Some subcommands such as btrfs device have their own usage documentation. More information: https://btrfs.wiki.kernel.org/index.php/Manpage/btrfs.
 
  • Create subvolume:
     
    sudo btrfs subvolume create {{path/to/subvolume}}
     
  • List subvolumes:
     
    sudo btrfs subvolume list {{path/to/mount_point}}
     
  • Show space usage information:
     
    sudo btrfs filesystem df {{path/to/mount_point}}
     
  • Enable quota:
     
    sudo btrfs quota enable {{path/to/subvolume}}
     
  • Show quota:
     
    sudo btrfs qgroup show {{path/to/subvolume}}

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