df #하드디스크 용량 확인

사용법: df [<옵션>]... [<파일>]...
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 블록 사용 대신 inode 정보를 목록화
-k --block-size=1K 와 같음
-l, --local 로컬 파일 시스템만 목록화

--no-sync 사용량 정보를 얻어오기 전에 sync를 실행하지 않음 (기본값)
--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 이 도움말을 표시하고 끝냅니다
--version 버전 정보를 출력하고 끝냅니다

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).