Choose my career as Linux Administrator but I really don't know its is good choice or not as compare to Software Developer.
A Linux Administrator job can definitely be something you can start your career with. It is basically the first step to start working in the Linux industry. Literally every company nowadays works on Linux. So yes, you are good to go.
But then sooner or later you may have to switch or learn newer and advanced technologies for example if you are a Red Hat System Administrator then you'll have to go for Red Hat Engineer/Architect to earn better, which obviously requires good knowledge of the basics. So yeah, starting a career as a Linux Administrator is good but it probably won't earn you a living later on.