How to find out the size of more files?

[Octavian Rasnita]

Hi all,

Please tell me:

1. How to find out the size of a directory and all subdirectoreies (the size
of all files)
2. How to find out the size of the files from the current directory only
even though it has some subdirectories with files.
3. How to "select some files than to find out the size of these files.
For example, I want to find the size of all .zip files from a directory and
then the size of all .shtml files from the same directory.

Thank you.

Teddy,
orasnita at home.ro