This is my first experience with Linux. I want to install a package (named screen) and I have access to a SSH login which I use putty on Windows to do so. Is there a way to install screen from putty or should I ask my VPS provider to install it?
Install a package from SSH
linux;software installation;gnu screen
It looks like your linux distro is Red Hat Enterprise Linux-based, most likely CentOS if it is a hosted environment.  It looks like you're using the kernel from version 6.7.The simplest way to install screen is to to run sudo yum install screen as your regular user.Also, the kernel you are running is very out of date.  2.6.32-573.el6.x86_64 is the kernel that shipped with CentOS 6.7, and has had several updates since it came out last year.  You will want to run sudo yum upgrade frequently, or set up the yum-cron service to automatically download and apply updates periodically.