Can I install a command line version of deja-dup backup utility on Ubuntu server?
I wish to restore a backup of my previous Home directory made with deja-dup.
No, you can't. But Deja Dup is just a graphical front end for the command line tool duplicity, which you can use on a server.
Its command line interface is a bit complicated, but read its man page or some of the instructions in Deja Dup's manual restore help page: https://live.gnome.org/DejaDup/Help/Restore/WorstCase
Yes you can. I just did.
Follow the instructions here and you can run deja-dup using the X of your own machine.
Then you just execute from your local machine: