You work as a Network Administrator for Net World International. You have installed a Linux server on the company's network. Users report that they are unable to write on a filesystem. You verify that there is no free space available on the hard disk drive. You mount another hard disk drive to resolve the issue. How will you prevent the issue from happening again?

Track the amount of free space on the hard disk.

Explanation:

The user serves as just a system admin with Net World International. He configured the Linux system on the company's network. Client complains because they seem to be unwilling to compose to such a file server.  

Check there is no usable capacity left on that hard drive. He's going to install another hard disk drive that fixes the problem. Then record the number of available storage on that HDD which stops the problem from occurring further.

i think the answer would be a