read start _ < <(du -bcm /filename)是啥意思
无意中看到kali官网有这么一个命令(网址是https://docs.kali.org/downloading/kali-linux-live-usb-persistence):
First, begin by imaging the latest Kali Linux ISO (currently 2016.2) to your USB drive as described in this article. We’re going to assume that the two partitions created by the imaging are /dev/sdb1 and /dev/sdb2. This can be verified with the command “fdisk -l“.
Create and format an additional partition on the USB drive.
First, let’s create the new partition in the empty space above our Kali Live partitions.
end=7gb
read start _ < <(du -bcm kali-linux-2016.2-amd64.iso | tail -1); echo $start
parted /dev/sdb mkpart primary $start $end
The parted command may advise you that it can’t use the exact start values you specified; if so, accept the suggested value instead. If advised that the partition isn’t placed at an optimal location, “ignore” it. When parted completes, the new partition should have been created at /dev/sdb3; again, this can be verified with the command “fdisk -l“.
请教下知道的大神,这句命令 read start _ < <(du -bcm kali-linux-2016.2-amd64.iso | tail -1) 是如何实现工作的?