Is it possible to mount a gzip compressed DD image?
This requires you to use a package called kpartx. kpartx allows you to mount individual partitions in a full disk image. Now you need to create devices for each of the partitions in the full disk image:
Is the zstd command line compatible with gzip?
zstd supports same commands and pipe capabilities as gzip, so if the set of commands works with gzip, it will work with zstd too.
How to decompress LZMA2 and zstd files?
Important Note: I’m unpacking very large files, so it would be great if the solution takes into consideration any potential Memory Errors.
How to get rid of DD in zstd?
Using dd like that (without any options) will make your life miserable. Just cut it out entirely. Or at the very least increase its block size and tell it not to object to short reads. Without dd, first run sudo -s to get a root shell: Your zstd commands look entirely plausible, but just omit dd and read/write the device directly as root.
How to read a.gz.dd image file?
If you want to read the files on-the-fly from your (gzip) compressed filesystem without having to unpack it, use mksquasfs and dd to create it in the first place. You can also choose the compression with the -comp option of mksquashfs, e.g. gzip, lzo, xz etc.
How to compress DD backup on the fly in Linux?
Alternatively, you could mount the disk with the uid / gid mount options (assuming ext3) so you have write permissions as whatever user you are. Or, use root to create a folder in /media/disk which you have permissions for. The block size only really matters for speed for the most part.
Is it possible to mount a full disk image?
If you use nbdkit to mount a full disk image (vs. a partition image), you might need to specify the block size (sector size of the disk) when connecting to the NBD server, as it defaults to 1024 bytes. To use 512 bytes instead: After that, the disk will appear as /dev/nbd0, and you should be able to view the partition table using fdisk -l.