I'd say if this is only your machine and you're not supposed to share those administration scripts with any other one, so you'd better to keep doing that in Python (which seems you feel more comfortable on that).
But if you have colleagues or your admin scripts are supposed to employee by other people, so let keep it in a way that is more popular and more understandable for others also: Bash!
Also I guess if you know Bash, you can simply use dozens of existing Bash scripts by customizing them or improving them to whatever which is more suitable for you!
