mattrib - change MSDOS file attribute flags
mattrib [-a|+a] [-h|+h] [-r|+r] [-s|+s] msdosfile [msdosfiles ...]
Mattrib will add attribute flags to an MSDOS file (with the '+' operator)
or remove attribute flags (with the '-' operator).
Mattrib will allow the following command line options:
Archive bit. Used by some backup programs to indicate a new file.
Read-only bit. Used to indicate a read-only file. Files with this
bit set cannot be erased by DEL or modified.
System bit. Used by MSDOS to indicate a operating system file.
Hidden bit. Used to make files hidden from DIR.