copy os from usb to disk

[peer]

I have a working linux debian 9 os on my laptop (hda1).
I also have working linux debian 9 os (nr. 2) on a usb device (sdb1)
I want to copy the second os to my laptop and create a dual boot.
I am planning to do:
1. create a extra partition hdaX with the same size as sdb1
2. copy the partition sdb1 to sdaX with dd
3. change /dev/sdb1 to /devsdaX in grub.cfg
4. run grun-update on hda1

Will this work? Am I forgetting something or should I do this in another way?

[ruwolf]

Code: Select all

dd ...

is not needed here.

Code: Select all

cp -a

should be sufficient.

You must change /etc/fstab, too...

[peer]

thanks,
I try to copy first and I forgot the fstab. I probably will have to change the UIID.

[peer]

I created a new partition with Gparted. OK!
Then tried to copy from usb -stick with the filemanager of parted-magic. NOT OK! There were copy-failures.
Then I cloned the partition instead with dd. OK!
I checked grub.cfg and fastb. Both used the proper UIID. OK!
Ran update-grub. OK!
Now I have a proper working dual boot!!!!