ceph@ceph8:~$ df --help
Usage: df [OPTION]... [FILE]...
Show information about the file system on which each FILE resides,
or all file systems by default.
-a, --all include dummy file systems
-T, --print-type print file system type
-h, --human-readable print sizes in human readable format (e.g., 1K 234M 2G)
-H, --si likewise, but use powers of 1000 not 1024
-B, --block-size=SIZE scale sizes by SIZE before printing them. E.g.,
'-BM' prints sizes in units of 1,048,576 bytes.
See SIZE format below.
-k like --block-size=1K
-i, --inodes list inode information instead of block usage
-l, --local limit listing to local file systems
--no-sync do not invoke sync before getting usage info (default)
--output[=FIELD_LIST] use the output format defined by FIELD_LIST,
or print all fields if FIELD_LIST is omitted.
-P, --portability use the POSIX output format
--sync invoke sync before getting usage info
--total elide all entries insignificant to available space,
and produce a grand total
-t, --type=TYPE limit listing to file systems of type TYPE
-x, --exclude-type=TYPE limit listing to file systems not of type TYPE
Display values are in units of the first available SIZE from --block-size,
and the DF_BLOCK_SIZE, BLOCK_SIZE and BLOCKSIZE environment variables.
Otherwise, units default to 1024 bytes (or 512 if POSIXLY_CORRECT is set).
SIZE is an integer and optional unit (example: 10M is 10*1024*1024). Units
are K, M, G, T, P, E, Z, Y (powers of 1024) or KB, MB, ... (powers of 1000).
FIELD_LIST is a comma-separated list of columns to be included. Valid
field names are: 'source', 'fstype', 'itotal', 'iused', 'iavail', 'ipcent',
'size', 'used', 'avail', 'pcent' and 'target' (see info page).
ceph@ceph8:~$ df
Filesystem 1K-blocks Used Available Use% Mounted on
udev 4068204 4 4068200 1% /dev
tmpfs 815776 1304 814472 1% /run
/dev/sda1 953062292 22830572 881795856 3% /
none 4 0 4 0% /sys/fs/cgroup
none 5120 0 5120 0% /run/lock
none 4078872 84 4078788 1% /run/shm
none 102400 76 102324 1% /run/user
hcd@hcd5:~$ df
Filesystem 1K-blocks Used Available Use% Mounted on
-----------------------------------------------------------
udev 32922592 4 32922588 1% /dev
tmpfs 6586696 1880 6584816 1% /run
none 4 0 4 0% /sys/fs/cgroup
none 5120 0 5120 0% /run/lock
none 32933464 84 32933380 1% /run/shm
none 102400 28 102372 1% /run/user
/dev/sda1 9480420 6003148 2972648 67% /
/dev/sda6 49663724 13279084 33838824 29% /home
ceph@ceph8:~$ df -ha
Filesystem Size Used Avail Use% Mounted on
udev 3.9G 4.0K 3.9G 1% /dev
tmpfs 797M 1.3M 796M 1% /run
/dev/sda1 909G 22G 841G 3% /
sysfs 0 0 0 - /sys
proc 0 0 0 - /proc
devpts 0 0 0 - /dev/pts
binfmt_misc 0 0 0 - /proc/sys/fs/binfmt_misc
systemd 0 0 0 - /sys/fs/cgroup/systemd
gvfsd-fuse 0 0 0 - /run/user/1000/gvfs
none 4.0K 0 4.0K 0% /sys/fs/cgroup
none 0 0 0 - /sys/fs/fuse/connections
none 0 0 0 - /sys/kernel/debug
none 0 0 0 - /sys/kernel/security
none 5.0M 0 5.0M 0% /run/lock
none 3.9G 84K 3.9G 1% /run/shm
none 100M 76K 100M 1% /run/user
none 0 0 0 - /sys/fs/pstore
root@hcd5:/home/hcd# df -ha
Filesystem Size Used Avail Use% Mounted on
-----------------------------------------------------------
udev 32G 4.0K 32G 1% /dev
tmpfs 6.3G 1.9M 6.3G 1% /run
none 4.0K 0 4.0K 0% /sys/fs/cgroup
none 5.0M 0 5.0M 0% /run/lock
none 32G 84K 32G 1% /run/shm
none 100M 28K 100M 1% /run/user
/dev/sda1 9.1G 5.8G 2.9G 67% /
/dev/sda6 48G 13G 33G 29% /home
/dev/nvme0n1 477G 33M 477G 1% /data/nvme0