I am supposing this will not work - simply using dd to copy the booted disk /dev/sda for example to a file on an external hard drive. This would not be a good back as too many system file would be missed. right?
2 points
*
You can boot off usb stick. Or grab a copy of clonezilla and boot off that memory stick with all the tools you’d want for drive or partition copy/restore
3 points
Indeed. Clonezilla is cool but comes with a considerable learning curve and lots of text to read. Rescuezilla, based on Clonezilla, is easier.
0 points