2012年4月13日 · The dd command includes LOTS of options that cat is not able to accommodate. Perhaps in your usage cases cat is a workable substitute, but it is not a dd replacement. One …

Of course you can use cat or cp. But dd has more options such as only backup/restore the bootsector or copy a limited amount of random data from /dev/random. Wikipedia has a more …

dd has an unusual command line syntax, so explaining how it works gives more of an opportunity to shine by explaining something that just writing cat /dev/sr0. Using dd with a large buffer size …

2018年7月5日 · dd copies exactly count blocks of bs bytes, or 2880*512 bytes in total in this case (but see below). That will truncate or pad the concatenation of the two files to a fixed size …

2017年4月13日 · From reading this, it seems that when copying data to a different hard drive, cat automatically uses the optimum block size (or very near it). I wonder how it determines the …

2015年12月11日 · Here it says that when using dd through dm-crypt to overwrite a block device, only the default dd block size should be used because dm-crypt 's block size is the same (512 …

2016年5月2日 · I need to concatenate chunks from two files: if I needed concatenate whole files, I could simply do cat file1 file2 > output But I need to skip first 1MB from the first file, and I only …

Question: In what circumstances is dd safe to use for copying data? In other words, what conditions on the block sizes, on the implementation, on the file types, etc, can ensure that dd …

2024年11月19日 · I was thinking of dd or cat the boot/efi partition to the beginning of a new 500GB SSD then dd or cat the Widows 7 partition to right after it. Hopefully leaving the rest of …

using the command dd iflag=nonblock status=none if=/path/to/file is right on par with the cat command, in terms of speed but it uses 400% more syscalls. dd and cat are part of coreutils …