On Mon, 1 Aug 2016, Xen wrote:
extundelete /dev/sdaX --restory-directory home/<user>/<work-directory>
That must be "restore-directory" of course. cd /tmp extundelete <device> --restore-directory home/<user>/<work-directory> cd RECOVERED_FILES grep -r "text to search"Would in general be all you need to do on a system you boot off USB or DVD.
Prior to that e.g. apt install extundelete. Possibly cryptsetup open, etc.... But the above would work on any normal non-encrypted system.