It probably isn't. You may be reading it incorrectly. Please refer to http://www.linuxatemyram.com/

You do not need to clear your RAM cache. Linux has many decades of excellent memory management...

You can change your SSH port by simply logging in to your VPS and then opening up the SSH daemon...

For Linux VPS line, TUN/TAP is enabled by default. You don't need to run modprobe. This will...

To enable NFS on your VPS, you can simply open a ticket with us and we'll handle the rest.