pipe password to passwd

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1

Is there a way that I can pipe text to passwd...

This is what I am trying to accomplish
e.g. passwd [user] < cat password.txt

2

I don't think passwd uses standard-in; so my best guess is no, you can't pipe or redirect in. You may use command line examples likke: xargs or find -exec passwd {} \; and similar command line forms.

3

or use expect

4

But Mib, te url you mention, just having source of tcl and expect, and configuration ask us to compile it using C.
It's pity, in my RS6000/AIX no C installed, only java.

5

it is time to visit GCC, the GNU Compiler Collection - GNU Project