The main thing to know is that the -s flag gives a total for a subtree without showing every subdir in it. It is very efficient to use the results of overnight du runs that are stored. Go to the end of the file and search backwards for your name. Mail sysprog about it. Disk Quotas Disk space is a perpetual problem.
Nice users can run out of space because others use way too much disk.
Therefore we are imposing disk quotas on student homes and mailboxes. All student homes must use less than 20 Mb of disk. All alumni homes must use less than 5 Mb of disk. When usage exceeds the soft limit, you see messages to reduce usage. When usage exceeds the hard limit, you cannot write to your files.