Tổng hợp các lệnh “df” hữu dụng khi kiểm tra dung lượng ổ đĩa trên Linux

[root@dotrungquan ~]# df
Filesystem     1K-blocks     Used Available Use% Mounted on
/dev/vda1       41283904 13990256  25196548  36% /
tmpfs            1962396      232   1962164   1% /dev/shm

2. Hiện thị thông tin  ổ đĩa các file hệ thống sử dụng

[root@dotrungquan ~]# df -a
Filesystem       1K-blocks     Used Available Use% Mounted on
/dev/vda1         41283904 13991596  25195208  36% /
proc                     0        0         0    - /proc
sysfs                    0        0         0    - /sys
devpts                   0        0         0    - /dev/pts
tmpfs              1962396      232   1962164   1% /dev/shm
none                     0        0         0    - /proc/sys/fs/binfmt_misc
gvfs-fuse-daemon         0        0         0    - /root/.gvfs

3.  Hiển thị dung lượng đĩa sử dụng dạng MB và GB

[root@dotrungquan ~]# df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/vda1        40G   14G   25G  36% /
tmpfs           1,9G  232K  1,9G   1% /dev/shm

 4. Hiện thị thông tin về thư mục Home

[root@vultr ~]# df -hT /home
Filesystem     Type  Size  Used Avail Use% Mounted on
/dev/vda1      ext4   40G   14G   25G  36% /

5. Hiển thị thông tin về các file hệ thống theo bytes

[root@dotrungquan ~]# df -k
Filesystem     1K-blocks     Used Available Use% Mounted on
/dev/vda1       41283904 13994420  25192384  36% /
tmpfs            1962396      232   1962164   1% /dev/shm

6.  Xem thông tin file hệ thống ở MB

[root@dotrungquan ~]# df -m
Filesystem     1M-blocks  Used Available Use% Mounted on
/dev/vda1          40317 13666     24603  36% /
tmpfs               1917     1      1917   1% /dev/shm

7.  Xem thông tin file hệ thống ở GB

[root@dotrungquan ~]# df -h
Filesystem      Size  Used Avail Use% Mounted on
/dev/vda1        40G   14G   25G  36% /
tmpfs           1,9G  232K  1,9G   1% /dev/shm

 8.  Xem thông tin Inodes

[root@dotrungquan ~]# df -i
Filesystem      Inodes  IUsed   IFree IUse% Mounted on
/dev/vda1      2621440 150862 2470578    6% /
tmpfs           490599      7  490592    1% /dev/shm

 9.  Hiển thị thông tin định dạng file hệ thống

[root@dotrungquan ~]# df -T
Filesystem     Type  1K-blocks     Used Available Use% Mounted on
/dev/vda1      ext4   41283904 13994384  25192420  36% /
tmpfs          tmpfs   1962396      232   1962164   1% /dev/shm

10. Xem các lệnh df

[root@dotrungquan ~]#  df --help
Usage: df [OPTION]... [FILE]...
Show information about the file system on which each FILE resides,
or all file systems by default.
Mandatory arguments to long options are mandatory for short options too.
  -a, --all             include dummy file systems
  -B, --block-size=SIZE  use SIZE-byte blocks
      --direct          show statistics for a file instead of mount point
      --total           produce a grand total
  -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
  -k                    like --block-size=1K
  -l, --local           limit listing to local file systems
      --no-sync         do not invoke sync before getting usage info (default)
  -P, --portability     use the POSIX output format
      --sync            invoke sync before getting usage info
  -t, --type=TYPE       limit listing to file systems of type TYPE
  -T, --print-type      print file system type
  -x, --exclude-type=TYPE   limit listing to file systems not of type TYPE
  -v                    (ignored)
      --help     display this help and exit
      --version  output version information and exit
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 may be (or may be an integer optionally followed by) one of following:
KB 1000, K 1024, MB 1000*1000, M 1024*1024, and so on for G, T, P, E, Z, Y.
Report df bugs to bug-coreutils@gnu.org
GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
General help using GNU software: <http://www.gnu.org/gethelp/>
For complete documentation, run: info coreutils 'df invocation'

Trên đây là các lệnh “df” thường dùng.

Chúc bạn thành công.