DVD ripping is one thing, but sometimes you want to just copy the whole DVD to your hard drive. On Ubuntu Linux, my preferred software for this is dvdbackup.
dvdbackup -i /dev/sr0 -o ~ -M
The software works perfectly, even though it was last updated in 2012. But hey, the DVD specs have not changed for the last 20 years!
rsync --progress --recursive source target
To resume a previously interrupted copy:
rsync --progress --recursive --ignore-existing source target
Please note that rsync source/ target and rsync source target do produce different results!
The trailing slash at the end of the source directory causes rsync to copy the contents of the source directory into the target directory. Without the trailing slash, the target directory will contain one directory that is identical to the source directory.
In order to copy all xml files from one directory to another without overwriting existing files with the same name:
cp -vnpr /source/*.xml /destination