List files in sorted order - by file size

Many time we might encounter situation like the mount point is almost full and might need to clear some old logs to make space.

ls -lS -> will list files in sorted order by size
ls -lhS -> will list files in sorted order by size and will show the file size in readable format.
ls -RSh -> will list files in sorted order by size and shows files in directory and sub directory recursively.