Hello everyone.
Sorry for the ones that did not managed to get it work, but the step by step guide seems to work for me.
Here is an an update for the install guide with v7p2.
### install dependecies
sudo apt-get update && sudo apt-get upgrade
sudo apt-get install -y subversion vim cmake build-essential gfortran mpich subversion python python-numpy dialog
### download telemac in your home folder
svn co http://svn.opentelemac.org/svn/opentelemac/tags/v7p2r0/ ~/telemac/v7p2 --username ot-svn-public --password telemac1*
### bashrc settings
then insert these lines with "i" at the end of the file
# telemac
export PATH=~/telemac/v7p2/scripts/python27/:$PATH
export SYSTELCFG=~/telemac/v7p2/configs/systel.ubuntu.cfg
escape (ESC) save with":wq" + RETURN. Apply with
### install metis
cd ~/telemac/v7p2/optionals
mkdir tmp
cd tmp
mkdir metis_staging_area
cd metis_staging_area
wget http://glaros.dtc.umn.edu/gkhome/fetch/sw/metis/metis-5.1.0.tar.gz
gunzip metis-5.1.0.tar.gz
tar -xvf metis-5.1.0.tar
cd metis-5.1.0
vim Makefile
change ("i" then ESC then ":wq")
prefix = ~/telemac/v7p2/optionals/metis-5.1.0/build/
cc = gcc
copy the makefile and remove temp folder
cp Makefile ~/telemac/v7p2/optionals/metis-5.1.0
cd ~/telemac/v7p2/optionals/tmp
rm -rf metis_staging_area
compile
cd ~/telemac/v7p2/optionals/metis-5.1.0
make config
make
### copy the config file systel.ubuntu.cfg into ~/telemac/v7p2/configs/ (
inspired with qilong)
### compile TELEMAC
### test it !
cd ~/telemac/v7p2/examples/telemac2d/bumpflu
telemac2d.py t2d_bumpflu.cas
telemac2d.py t2d_bumpflu.cas --ncsize=4