du

Question 1

du

Answer 1

Summarize disk usage of the set of FILEs, recursively for directories.

Question 2

du

• 0
• a
• B
• b
• c
• d

Answer 2

• 0, –null, End each output with NUL.
• a, –all, Write counts for all files.
• B, –block-size=SIZE, Scale sizes by SIZE
• b, –bytes, Equivalent to –apparent-size –block-size=1
• c, –total, Produce grand total.
• d, –max-depth=N, Print the total for a directory (or file, with –all) only if it is N or fewer levels below the command line argument; –max-depth=0 is the same as –summarize.

Question 3

du

-h

–inodes

• L
• l
• m
• P
• S

Answer 3

-h, –human-readable

–inodes, List inode usage instead of block.

• L, –dereference, Dereference all symbolic links.
• l, –count-links, Count sizes many times if hard linked.
• m, Like –block-size=1M
• P, –no dereference, Don’t follow symbolic links (default)
• S, –separate-dirs, For directories do not include size of subdirectories.

Question 4

du

–si

• s
• t
• X

–exclude=PATTERN

-x

Answer 4

–si, Like -h, but use powers of 1000 not 1024.

• s, –summarize, Display only a total for each argument.
• t, –threshold=SIZE, Exclude entries smaller than SIZE if positive, or entries greater than SIZE if negative.
• X, –exclude-from=FILE, Exclude files that match any pattern in FILE.

–exclude=PATTERN, Exclude files that match PATTERN.

-x, –one-file-system, Skip directories on different file systems.

Question 5

du

–time

–time=WORD

–time-style=STYLE

Answer 5

–time, Show time of the last modification of any file in the directory, or any of its subdirectories.

–time=WORD, Show time as Word instead of modification time: atime, access, use, ctime, status

–time-style=STYLE, Show times using STYLE, which can be: full-iso, long-iso, iso, or +FORMAT; FORMAT is interpreted like ‘date’.