install and build Julia in ubuntu

getting-julia

# In a terminal... make sure I get the master branch

git clone -b master git://github.com/JuliaLang/julia.git

# needed these on EC2
sudo apt-get update
sudo apt-get install gcc
sudo apt-get install g++
sudo apt-get install gfortran
sudo apt-get install make

# change to directory and run make
cd julia
make
# wait a long time, then
export PATH="$(pwd):$PATH"
# start julia
julia


# to remove: 
rm -r -f julia
sudo dpkg --remove julia