According to me both (Python and Linux), its depends upon you which job you want and which things you want to learn.
Now a days Python is so popular, i will tell you to learn Python and become expert in it.
Is Python good for getting a job?
Nowadays Python Programming Language is so much popular and you will find many career opportunities. Python is a general-purpose object-oriented programming language used for website development, web application development, machine learning, Artificial Intelligence, and data science.
Python is a awesome career option. The average Python developer salary is $200,000