Help,

it seem that i am unable to get man help form solaris 10.

I am running SunOS unknown 5.10 Generic_120012-14 i86pc i386 i86pc
when ever i try to man a command what i get is "No manual entry" like the one below.

# man grep
No manual entry for grep.
# man ls
No manual entry for ls.
# man useradd
No manual entry for useradd.
# man mkdir
No manual entry for mkdir.

could some one help, what i can do?