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# df --help
-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
-h, --human-readable print sizes in human readable format (e.g., 1K 234M 2G)
-H, --si likewise, but use powers of 1000 not 1024
-i, --inodes list inode information instead of block usage
-T, --print-type print file system type
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).
# man df
NAME
df - report file system disk space usage
SYNOPSIS
df [OPTION]... [FILE]...
DESCRIPTION
df displays the amount of disk space available on the file system containing each file name argument.
OPTIONS
-h, --human-readable
print sizes in human readable format (e.g., 1K 234M 2G)
-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
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).
# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/centos-root 6.7G 1023M 5.7G 15% / devtmpfs 362M 0 362M 0% /dev tmpfs 371M 0 371M 0% /dev/shm tmpfs 371M 5.0M 366M 2% /run tmpfs 371M 0 371M 0% /sys/fs/cgroup /dev/sda1 497M 119M 379M 24% /boot
-h, --human-readable print sizes in human readable format (e.g., 1K 234M 2G)
$ df -m Filesystem 1M-blocks Used Available Use% Mounted on /dev/sda2 8670 2699 5524 33% / /dev/sda1 289 17 258 6% /boot tmpfs 248 0 248 0% /dev/shm
$ df -BG Filesystem 1G-blocks Used Available Use% Mounted on /dev/sda2 9G 3G 6G 33% / /dev/sda1 1G 1G 1G 6% /boot tmpfs 1G 0G 1G 0% /dev/shm
$ df -BM Filesystem 1M-blocks Used Available Use% Mounted on /dev/sda2 8670M 2699M 5524M 33% / /dev/sda1 289M 17M 258M 6% /boot tmpfs 248M 0M 248M 0% /dev/shm
$ df -BT Filesystem 1T-blocks Used Available Use% Mounted on /dev/sda2 1T 1T 1T 33% / /dev/sda1 1T 1T 1T 6% /boot tmpfs 1T 0T 1T 0% /dev/shm
[root@centos7 ~]# df -hT Filesystem Type Size Used Avail Use% Mounted on /dev/mapper/centos-root xfs 6.7G 2.8G 3.9G 43% / devtmpfs devtmpfs 362M 0 362M 0% /dev tmpfs tmpfs 371M 0 371M 0% /dev/shm tmpfs tmpfs 371M 5.0M 366M 2% /run tmpfs tmpfs 371M 0 371M 0% /sys/fs/cgroup /dev/sda1 xfs 497M 119M 379M 24% /boot tmpfs tmpfs 75M 0 75M 0% /run/user/0 [root@centos7 ~]#
-h, --human-readable print sizes in human readable format (e.g., 1K 234M 2G)
[root@centos7 ~]# df -HT Filesystem Type Size Used Avail Use% Mounted on /dev/mapper/centos-root xfs 7.2G 3.1G 4.2G 43% / devtmpfs devtmpfs 379M 0 379M 0% /dev tmpfs tmpfs 389M 0 389M 0% /dev/shm tmpfs tmpfs 389M 5.3M 384M 2% /run tmpfs tmpfs 389M 0 389M 0% /sys/fs/cgroup /dev/sda1 xfs 521M 125M 397M 24% /boot tmpfs tmpfs 78M 0 78M 0% /run/user/0 [root@centos7 ~]#
-H, --si likewise, but use powers of 1000 not 1024