Mercurial with Nautilus thanks tortoisehg

add those PPA if you need help read here:

To configure APT to trust this repository's signing key, run:
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-key 323293EE

deb http://ppa.launchpad.net/mercurial-ppa/stable-snapshots/ubuntu jaunty main
deb-src http://ppa.launchpad.net/mercurial-ppa/stable-snapshots/ubuntu jaunty main

and

To configure APT to trust this repository's signing key, run:
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-key D5056DDE

deb http://ppa.launchpad.net/tortoisehg-ppa/stable-snapshots/ubuntu jaunty main
deb-src http://ppa.launchpad.net/tortoisehg-ppa/stable-snapshots/ubuntu jaunty main

now you can install:

sudo apt-get install mercurial tortoisehg tortoisehg-nautilus

you also need iniparse
voila