The answer was no. As in the advertisement they have not mentioned that Linux knowledge is required. to the best of my knowledge for a Sr. Network Administrator job role you should know about Routers, Switches, Firewalls etc. Even if i am wrong they would have at least mentioned about Linux in their advertisement. Many job seekers have applied for the post and many are unaware of the Linux operating system. If kesari HR team have at lest mentioned about Linux they would have saved their and applicants time.