Setup.Ubuntu20.04

#!/bin/sh
# Sets up Ubuntu 20.04 from bare-bones installation 
# Comment out what you don't need or run line-by-line, manually
sudo apt-get -qq update && \
    DEBIAN_FRONTEND=noninteractive \
    sudo apt-get -qq install -y cmake make git vim gcc g++ gfortran wget gnupg-agent valgrind \
            mpich libmpich-dev \
            openmpi-bin openmpi-doc libopenmpi-dev

# Installing latest GCC compiler (version 10)
sudo apt-get -qq install -y gcc-10 g++-10 gfortran-10

sudo update-alternatives \
      --install /usr/bin/gcc      gcc      /usr/bin/gcc-9       80 \
      --slave   /usr/bin/g++      g++      /usr/bin/g++-9          \
      --slave   /usr/bin/gfortran gfortran /usr/bin/gfortran-9     \
      --slave   /usr/bin/gcov     gcov     /usr/bin/gcov-9
sudo update-alternatives \
      --install /usr/bin/gcc      gcc      /usr/bin/gcc-10      90 \
      --slave   /usr/bin/g++      g++      /usr/bin/g++-10         \
      --slave   /usr/bin/gfortran gfortran /usr/bin/gfortran-10    \
      --slave   /usr/bin/gcov     gcov     /usr/bin/gcov-10
sudo chmod u+s /usr/bin/update-alternatives

sudo apt-get clean && sudo rm -rf /var/lib/apt/lists/*

sudo wget -q http://ftp.math.utah.edu/pub/misc/ndiff-2.00.tar.gz && \
    tar -xzf ndiff-2.00.tar.gz && cd ndiff-2.00 && \
    sudo mkdir -p /usr/local/man/man1 && \
    ./configure && make && sudo make install && cd .. && rm -rf ndiff-2.00

#make clean
#make