Linux in a Nutshell, Fifth Edition

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Chapter 3: Linux Commands

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-z, --zero-terminated

End lines with zero byte, not with newline.

--version

Print version information and then exit.

-M, --month-sort

Attempt to treat the first three characters as a month designa-

tion (JAN, FEB, etc.). In comparisons, treat JAN < FEB and

any invalid name for a month as less than a valid month.

-Ssize, --buffer-size=size

Set the size of the main memory buffer to size, which may

include a suffix—e.g., K (1024, the default) or M.

-T tempdir, --temporary-directory=dir

Directory pathname to be used for temporary files.

Examples

List files by decreasing number of lines:

wc -l * | sort -r

Alphabetize a list of words, remove duplicates, and print the

frequency of each word:

sort -fd wordlist | uniq -c

Sort the password file numerically by the third field (user ID):

sort -nk3,4 -t: /etc/passwd

split

split [options] [infile [prefix]]

Split infile into equal-sized segments. infile remains unchanged, and

the results are written to prefixaa, prefixab, and so on. The default

prefix is x, giving the output files xaa, xab, etc. If infile is - or

missing, standard input is read. See also csplit.

Options

-a n, --suffix-length=n

Use suffixes of length n (default is 2).

-b n[b|k|m], --bytes=n[b|k|m]

Split infile into n-byte segments. Alternate block sizes may be

specified: ...