I know password shadowing has been in place for some time now, but my ISP seems
to have some unusual system. For a start, there appears to be no /etc/shadow, but there
is an /etc/passwd. However, the contents of this file seem partly shadowed
and partly unshadowed. Can someone suggest 1) what kind of shadowing system
the ISP may be using; 2) what the point is of including some encrypted passwords
and others replaced by *; and 3) why the encrypted passwords seem unusually
long. I'm pasting an extract from the /etc/passwd file below.