df command

2 분 소요

linux의 df 명령어를 통해 현재 디스크의 전체 사용량을 확인 할 수 있습니다.

기본 사용법

$> df
Filesystem                1K-blocks      Used Available Use% Mounted on
udev                        8123612         0   8123612   0% /dev
tmpfs                       1630992     17960   1613032   2% /run
/dev/mapper/mint--vg-root 229063924 159664024  57741048  74% /
tmpfs                       8154948    554936   7600012   7% /dev/shm
tmpfs                          5120         4      5116   1% /run/lock
tmpfs                       8154948         0   8154948   0% /sys/fs/cgroup
/dev/sda1                    482922    279826    178162  62% /boot
cgmfs                           100         0       100   0% /run/cgmanager/fs
tmpfs                       1630992       520   1630472   1% /run/user/1000

출력된 정보는 다음과 같습니다.

  • Filesystem : 파일 시스템 이름
  • 1K-blocks : 전체 크기
  • Used : 사용중인 크기
  • Available : 사용가능한 크기
  • Use% : 사용중인 크기 백분율
  • Mounted on : 마운트된 파일 시스템

활용

$> df -x tmpfs | sed '/^\/dev\/loop/d'
Filesystem                1K-blocks      Used Available Use% Mounted on
udev                        8123612         0   8123612   0% /dev
/dev/mapper/mint--vg-root 229063924 159665860  57739212  74% /
/dev/sda1                    482922    279826    178162  62% /boot

Help

$> 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 pseudo, duplicate, inaccessible file systems
  -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 powers of 1024 (e.g., 1023M)
  -H, --si              print sizes in powers of 1000 (e.g., 1.1G)
  -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)
      --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
  -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).

The SIZE argument is an integer and optional unit (example: 10K is 10*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', 'file' and 'target' (see info page).

GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
Full documentation at: <http://www.gnu.org/software/coreutils/df>
or available locally via: info '(coreutils) df invocation'

TLDR

$> tldr df

  df

  Gives an overview of the file system disk space usage.

  - Display all file systems and their disk usage:
    df

  - Display all file systems and their disk usage in human readable form:
    df -h

  - Display the file system and its disk usage containing the given file or directory:
    df path/to/file_or_directory

  - Display statistics on the number of free inodes:
    df -i

  - Display file systems but exclude the specified type:
    df -x squashfs -x tmpfs

참고