I'm trying to upgrade my version of tree to 1.6 on ubuntu 12.04.

I've d'loaded, ran make and make install in the terminal using the sudo command.

~/tree-1.6.0$ sudo make
make: Nothing to be done for `all'.

I've already run sudo make here

~/tree-1.6.0$ sudo make install
install -d /usr/bin
install -d /usr/man/man1
if [ -e tree ]; then \
        install -s tree /usr/bin/tree; \
    fi
install doc/tree.1 /usr/man/man1/tree.1

What's this output though? It's not updated. I've checked the man page, and -du doesn't work.

How am I supposed to update tree if not via the terminal?