Shell scripting

I would like to learn more about shell scripting but am uncertain whether to learn something like Bash-scripting or find and read Python shell scripts.

One advantage to Bash-scripting is mentioned at reddit:

Python uses more memory and requires more disk space to be installed. This is might be important in small resource constraints environments such as embedded systems or small VMs.

Also the shell is always running and so shell scripts should start up faster than Python scripts.

Perhaps on a low cost embedded device Bash-scripting is the way to go. I will try to follow up on this later. As far as I can tell, one must have a shell on the system to work with, but having python is optional if one is willing to give up a lot of software. Therefore, for a system with limited hardware, in a sense you get bash scripting for free.