sudo.8 du(1) -h %2FUsers 2%3E%2Fdev%2Fnull %7C grep %27%5E%5Cs*%5B0-9%5D%5C%2BG%27 
execute a command as another user
 
estimate file space usage
 
-h, --human-readable
       print sizes in human readable format (e.g., 1K 234M 2G)
 
Summarize disk usage of each FILE, recursively for directories.
source manpages: sudo,  du