KB 到 MB 使用 bash
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KB To MB using bash
提问by Lurch
I use a command to get the size of a remote folder, after it's run it returns
我使用命令获取远程文件夹的大小，运行后返回
120928312 http://blah.com
The number is size in bytes. What I'd like to do is have it output in MB, and the httppart removed. I'm guessing greping to a file but not sure how to go about it.
该数字是以字节为单位的大小。我想要做的是以MB为单位输出，并http删除该部分。我猜想访问一个文件，但不知道如何去做。
回答by technosaurus
You can do it with shell builtins
你可以用 shell 内置函数来做到这一点
some_command |while read KB dummy;do echo $((KB/1024))Mb;done
Here is a more useful version:
这是一个更有用的版本：
#!/bin/sh
human_print(){
while read B dummy; do
[ $B -lt 1024 ] && echo ${B} bytes && break
KB=$(((B+512)/1024))
[ $KB -lt 1024 ] && echo ${KB} kilobytes && break
MB=$(((KB+512)/1024))
[ $MB -lt 1024 ] && echo ${MB} megabytes && break
GB=$(((MB+512)/1024))
[ $GB -lt 1024 ] && echo ${GB} gigabytes && break
echo $(((GB+512)/1024)) terabytes
done
}
echo 120928312 http://blah.com | human_print
回答by Kent
how about this line:
这行怎么样：
kent$ echo "120928312 http://blah.com"|awk '{/=1024;printf "%.2fMB\n",}'
118094.05MB
回答by Gilles Quenot
回答by sw1nn
function bytes_for_humans {
local -i bytes=;
if [[ $bytes -lt 1024 ]]; then
echo "${bytes}B"
elif [[ $bytes -lt 1048576 ]]; then
echo "$(( (bytes + 1023)/1024 ))KiB"
else
echo "$(( (bytes + 1048575)/1048576 ))MiB"
fi
}
$ bytes_for_humans 1
1 Bytes
$ bytes_for_humans 1024
1KiB
$ bytes_for_humans 16777216
16MiB
回答by jkshah
Try using awk
尝试使用 awk
awk '{MB=/1024; print $MB}'
$1- value of the first column, size (KB) in this case
$1- 在这种情况下，第一列的值，大小 (KB)
