How to detect the os from a bash script?

Question

I want to keep my script of  .bashrc and .bash_login files in version control to run in different OS. Can anyone tell me how to detect the OS in Bash script? 

Answer 1

Try the below code:

if [[ "$OSTYPE" == "linux-gnu"* ]]; then

        # ...

elif [[ "$OSTYPE" == "darwin"* ]]; then

        # Mac OSX

elif [[ "$OSTYPE" == "cygwin" ]]; then

        # POSIX compatibility layer and Linux environment emulation for Windows

elif [[ "$OSTYPE" == "msys" ]]; then

        # Lightweight shell and GNU utilities compiled for Windows (part of MinGW)

elif [[ "$OSTYPE" == "win32" ]]; then

        # I'm not sure this can happen.

elif [[ "$OSTYPE" == "freebsd"* ]]; then

        # ...

else

        # Unknown.

fi

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