Set bash shell

gistfile1.txt

# file: ~/.profile

case $- in
  *i*)
    # Interactive session. Try switching to bash.
    if [ -z "$BASH" ]; then # do nothing if running under bash already                                                                                                  
      bash=$(command -v bash)                                                                                                                                           
      if [ -x "$bash" ]; then                                                                                                                                           
        export SHELL="$bash"                                                                                                                                            
        exec "$bash"                                                                                                                                                    
      fi
    fi
esac