df

Question 1

df

Answer 1

df displays the amount of disk space available on the file system containing each file name argument.

Question 2

df

• a
• B
• h
• H
• i
• P

Answer 2

• a, –all, Include pseudo, duplicate, inaccessible file systems.
• B, –block-size=SIZE
• h, –human-readable
• H, –si
• i, –inodes
• P, –portability, Use the POSIX output format.

Question 3

df

• l
• t
• T
• x

–no-sync

–sync

Answer 3

• l, –local, Limit listing to local file systems.
• t, –type=TYPE, Limit listing to file systems of TYPE.
• T, –print-type, Print file system type.
• x, –exclude-type=TYPE, Exclude file systems of TYPE.

–no-sync, Do not invode sync before getting usage info(default).

–sync, Invoke sync before getting usage info.

Question 4

du

-k

–output[=FIELD_LIST]

–total

Answer 4

-k, –block-size=1K

–output[=FIELD_LIST], Use the output format defined by FIELD_LIST, or print all fields if FIELD_LIST is omitted.

–total, Elide all entries insignificant to available space, and produce a grand total.