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1. Profile should be established this umask  will be required later in the stack install as will the ulimit  settings
   

   Code Block
   language shell
   # .bash_profile umask 0022 ulimit -S -s unlimited if [[ ~/.bashrc ]]; then . ~/.bashrc fi cd ~

   
   
2. Follow the instructions for Prerequisites for Ubuntu (one-off): 
   1. apt install -y gcc-13 g++-13 gfortran-13 gdb
   1. gcc –version
   2. https://spack-stack.readthedocs.io/en/latest/NewSiteConfigs.html#prerequisites-ubuntu-one-off
   3. When installing the gcc compilers, make sure you install version 13
   4. Check that you have the links for the gcc compilers installed, and that the version is 13.x
3. Follow the instructions for creating a new environment:   https://spack-stack.readthedocs.io/en/latest/NewSiteConfigs.html#newsiteconfigs-linux-createenv 
   1. Step 1: For now use the 1.9.0 release branch when cloning spack-stack (Place the spack-stack clone in you home directory.)
      

      Code Block
      language shell
      git clone -b release/1.9.0 --recurse-submodules https://github.com/jcsda/spack-stack.git cd spack-stack # Sources Spack from submodule and sets ${SPACK_STACK_DIR} source setup.sh

   2. Step 2: Create a unified-dev environment - complete step following newsiteconfigs 
      

      Code Block
      language shell
      spack stack create env --site linux.default --template unified-dev --name unified-env.gcc --compiler=gcc cd envs/unified-env.gcc/ spack env activate [-p] .

   3. Step 3: follow newsiteconfigs 
   4. Step 4: follow newsiteconfigs 
   5. Step 5: Check that “spack compiler find --scope system” reports version 13.x)
   6. Step 6: follow newsiteconfigs 
   7. Step 7:  Use openmpi 5.0.5, can skip  add of mpich.  

      1. 1. Code Block
            language shell
            gcc --version#presumeversion #presume gcc v13.3.0 herespackhere spack config add "packages:all:compiler:[gcc@13.3.0]"

         2. Code Block
            language shell
            # openmpi v5.0.5 skip mpich install spack config add "packages:all:providers:mpi:[openmpi@5.0.5]"

   8. Step 8: follow newsiteconfigs 
   9. Step 9: skip - if new Orbstack 
   10. Step 10: skip - if new Orbstack
   11. Step 11: concretize and install: follow newsiteconfigs 

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