Filesys::Df          (3)  - Perl extension for filesystem disk space information
Tie::File            (3)  - Access the lines of a disk file via a Perl array
Tie::File            (3pm)  - Access the lines of a disk file via a Perl array
df                   (1)  - report filesystem disk space usage
df                   (1p)  - report free disk space
diskdumpctl          (8)  - diskdump controller
diskdumpfmt          (8)  - format a dump device or a partition
fd                   (4)  - floppy disk device
fdatasync            (2)  - synchronize a file's in-core data with that on disk
fdatasync [fsync]    (2)  - synchronize a file's complete in-core state with that on disk
fdformat             (8)  - Low-level formats a floppy disk
fdisk                (8)  - Partition table manipulator for Linux
floppy               (8)  - format floppy disks
fsync                (2)  - synchronize a file's complete in-core state with that on disk
gluDisk              (3x)  - draw a disk
gluPartialDisk       (3x)  - draw an arc of a disk
hd                   (4)  - MFM/IDE hard disk devices
hdparm               (8)  - get/set hard disk parameters
initrd               (4)  - boot loader initialized RAM disk
lvmdiskscan          (8)  - scan for all devices visible to LVM2
lvscan               (8)  - scan (all disks) for logical volumes
mbadblocks           (1)  - tests a floppy disk, and marks the bad blocks in the FAT
mcat                 (1)  - dump raw disk image
mformat              (1)  - add an MSDOS filesystem to a low-level formatted floppy disk
mkbootdisk           (8)  - creates a stand-alone boot floppy for the running system
mkinitrd             (8)  - creates initial ramdisk images for preloading modules
mmount               (1)  - mount an MSDOS disk
mpartition           (1)  - partition an MSDOS hard disk
mtools               (1)  - utilities to access DOS disks in Unix
mzip                 (1)  - change protection mode and eject disk on Zip/Jaz drive
partx                (8)  - telling the kernel about presence and numbering of on-disk partitions
pvcreate             (8)  - initialize a disk or partition for use by LVM
pvresize             (8)  - resize a disk or partition in use by LVM2
pvscan               (8)  - scan all disks for physical volumes
quota                (1)  - display disk usage and limits
quotacheck           (8)  - scan a filesystem for disk usage, create, check and repair quota files
quotactl             (2)  - manipulate disk quotas
ram                  (4)  - ram disk device
rdev                 (8)  - query/set image root device, RAM disk size, or video mode
savecore             (8)  - save a diskdump image
sd                   (4)  - Driver for SCSI Disk Drives
setfdprm             (8)  - sets user-provided floppy disk parameters
setquota             (8)  - set disk quotas
sfdisk               (8)  - Partition table manipulator for Linux
smartctl             (8)  - Control and Monitor Utility for SMART Disks
smartd               (8)  - SMART Disk Monitoring Daemon
smartd.conf [smartd] (5)  - SMART Disk Monitoring Daemon Configuration File
sync                 (2)  - commit buffer cache to disk
sync                 (8)  - synchronize data on disk with memory
vgscan               (8)  - scan all disks for volume groups and rebuild caches