[BusyBox] how does passwd work

[Jim Bauer]

On Friday 25 February 2005 11:42, Ralph Siemsen wrote:
> A relatively painless way to handle setting the password from a script 
> is to make use of the passwd command - it will know the correct format 
> on the system it runs on.  I have used the following approach:
> 
> (echo NEWPASS; sleep 1; echo NEWPASS) | passwd USERNAME
> 
> Some versions of "passwd" also accept the password as a parameter on the 
> commandline, or on stdin like so:
> 
> echo PASSWORD | /usr/bin/passwd --stdin USERNAME

If portability is a concern, be aware that some versions
of passwd always open up /dev/tty for user interaction.