I usually keep all of my dotfiles in a repo and share them across all of my machine. So when I had a couple of Bash alias’ that were not working and environment variables that were different on my Macbook it was becoming a bit annoying.

So I started using OS conditionals inside my .bash_aliases and .bashrc files

if [[ $(echo $OSTYPE) == "linux-gnu" ]]; then
  # Linux
elif [[ $(echo $OSTYPE) == "darwin"* ]]; then
  # Mac OSX
fi

Related External Links:

• Stack Overflow - detect-the-os-from-a-bash-script