A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
-bash/zsh: numfmt command not found #Debian apt-get install coreutils #Ubuntu apt-get install coreutils #Alpine apk add coreutils #Arch Linux pacman -S coreutils #Kali Linux apt-get install coreutils #CentOS yum install coreutils #Fedora dnf install coreutils #OS X brew install coreutils #Raspbian apt-get install coreutils #Docker docker run cmd.cat/numfmt numfmt
numfmt 命令用来实现数字和易读形式之间的转换。numfmt 默认是 coreutils 的一部分，默认情况下无需另外安装。
numfmt [OPTION]... [NUMBER]...
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=N
replace the number in input field N (default is 1)
--format=FORMAT
use printf style floating-point FORMAT; see FORMAT below for details
--from=UNIT
auto-scale input numbers to UNITs; default is 'none'; 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)
--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, ...
FORMAT must be suitable for printing one floating-point argument '%f'. Optional quote
(%'f) will enable --grouping (if supported by current locale). Optional width value
(%10f) will pad output. Optional negative width values (%-10f) will left-pad output.
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='fail' a
warning is printed for each conversion error and the exit status is 2. With
--invalid='warn' each conversion error is diagnosed, but the exit status is 0. With
--invalid='ignore' conversion errors are not diagnosed and the exit status is 0.
待转换的数字
numfmt 将 1.5K（国际单位制）转换为 1500：
numfmt --from=si 1.5K 1500
numfmt 将第 5 个字段（1索引）转换为 IEC 单位，而无需转换标题：
ls -l | numfmt --header=1 --field=5 --to=iec total 28 -rw-r--r-- 1 root root 25K Apr 7 2017 mysql57-community-release-el7-10.noarch.rpm
numfmt 转换为 IEC 单位，填充 5 个字符，左对齐：
du -s * | numfmt --to=iec --format="%-5f" 28 mysql57-community-release-el7-10.noarch.rpm
numfmt 其他示例：
$ 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 | numfmt --header --field 2 --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