I believe, the package responsible for doing installation and hence the partitioning stuff is
It's dependency includes
libparted0debian1 package which provides the main library doing the partitioning stuff. ( you can see this with
apt-cache depends ubiquity command ). But the main executable program used to do partitioning is
partman_server which are programs included in ubiquity. Also the installation log file
/var/log/installer/partman indicating this.
parted from Live session and installed Ubuntu without it successfully. Though I have to remove also
partman program is not intended for normal use. See the Warning! section in the package description in debian site. This program is not packaged as a standalone but included in
ubiquity package instead in Ubuntu.
There are many front-end programs available for normal use. A good GUI alternative is gparted. gparted
I found that
partman is a seperate package in debian, but it is not in Ubuntu. The program is included in