system qq {echo -e "$newpassword\n$newpassword" | passwd $username}

I explained the issues with running external commands like this in my node here. In this case, hippo has a good point about using existing modules, but if you absolutely must run an external command, in this case I might suggest IPC::Run3, as it allows you to avoid the shell and feed the external command some STDIN.

In reply to Re: Selecting Password by haukex
in thread Selecting Password by cbtshare

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