Below is a short screencast using the following commands:
df – display filesystem, this shows information about the disk space usage. Alternately you can use df -h to display the same information but in MB/GB/KB.
du – directory usage, this displays the size of a directory and all of it’s subdirectories. Use du -h to display in MB/GB/KB.
free – this displays the amount of free space that’s available on the system. In my case it’s just of the virtual machine. Use free -m to display in MB.
uname -a – This provides a range of basic information about the system.
top – This displays the processes using the most system requirements at one time. Use q to quit.