Linux man pages

Section (1) numfmt

Linux manual pages	Section 1

Name

numfmt — Convert numbers from/to human-readable strings

Synopsis

numfmt [OPTION...] [NUMBER...]

DESCRIPTION

Reformat NUMBER(s), or the numbers from standard input if none are specified.

Mandatory arguments to long options are mandatory for short options too.

−−debug: print warnings about invalid input
−d, −−delimiter=X/: use X instead of whitespace for field delimiter
−−field=FIELDS/: replace the numbers in these input fields (default=1) see FIELDS below
−−format=FORMAT/: use printf style floating−point FORMAT; see FORMAT below for details
−−from=UNIT/: auto−scale input numbers to UNITs; default is _zsingle_quotesz_none_zsingle_quotesz_; see UNIT below
−−from−unit=N/: specify the input unit size (instead of the default 1)
−−grouping: use locale−defined grouping of digits, e.g. 1,000,000 (which means it has no effect in the C/POSIX locale)
−−header[=N/]: print (without converting) the first N header lines; N defaults to 1 if not specified
−−invalid=MODE/: failure mode for invalid numbers: MODE can be: abort (default), fail, warn, ignore
−−padding=N/: pad the output to N characters; positive N will right−align; negative N will left−align; padding is ignored if the output is wider than N; the default is to automatically pad if a whitespace is found
−−round=METHOD/: use METHOD for rounding when scaling; METHOD can be: up, down, from−zero (default), towards−zero, nearest
−−suffix=SUFFIX/: add SUFFIX to output numbers, and accept optional SUFFIX in input numbers
−−to=UNIT/: auto−scale output numbers to UNITs; see UNIT below
−−to−unit=N/: the output unit size (instead of the default 1)
−z, −−zero−terminated: line delimiter is NUL, not newline
−−help: display this help and exit
−−version: output version information and exit

UNIT options:

none

no auto−scaling is done; suffixes will trigger an error

auto

accept optional single/two letter suffix:

1K = 1000, 1Ki = 1024, 1M = 1000000, 1Mi = 1048576,

si

accept optional single letter suffix:

1K = 1000, 1M = 1000000, ...

iec

accept optional single letter suffix:

1K = 1024, 1M = 1048576, ...

iec−i

accept optional two−letter suffix:

1Ki = 1024, 1Mi = 1048576, ...

FIELDS supports cut(1) style field ranges:

N: N_zsingle_quotesz_th field, counted from 1
N−: from N_zsingle_quotesz_th field, to end of line
N−M: from N_zsingle_quotesz_th to M_zsingle_quotesz_th field (inclusive)
−M: from first to M_zsingle_quotesz_th field (inclusive)
−: all fields

Multiple fields/ranges can be separated with commas

FORMAT must be suitable for printing one floating−point argument _zsingle_quotesz_%f_zsingle_quotesz_. Optional quote (%_zsingle_quotesz_f) will enable −−grouping (if supported by current locale). Optional width value (%10f) will pad output. Optional zero (%010f) width will zero pad the number. Optional negative values (%−10f) will left align. Optional precision (%.1f) will override the input determined precision.

Exit status is 0 if all input numbers were successfully converted. By default, numfmt will stop at the first conversion error with exit status 2. With −−invalid=_zsingle_quotesz_fail_zsingle_quotesz_ a warning is printed for each conversion error and the exit status is 2. With −−invalid=_zsingle_quotesz_warn_zsingle_quotesz_ each conversion error is diagnosed, but the exit status is 0. With −−invalid=_zsingle_quotesz_ignore_zsingle_quotesz_ conversion errors are not diagnosed and the exit status is 0.

EXAMPLES

$ numfmt --to=si 1000

−> 1.0K

$ numfmt --to=iec 2048

−> 2.0K

$ numfmt --to=iec-i 4096

−> 4.0Ki

$ echo 1K | numfmt --from=si

−> 1000

$ echo 1K | numfmt --from=iec

−> 1024

$ df -B1 | numfmt --header --field 2-4 --to=si
$ ls -l  | numfmt --header --field 5 --to=iec
$ ls -lh | numfmt --header --field 5 --from=iec --padding=10
$ ls -lh | numfmt --header --field 5 --from=iec --format %10f

AUTHOR

Written by Assaf Gordon.

REPORTING BUGS

GNU coreutils online help: <https://www.gnu.org/software/coreutils/>

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