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Force pubkey-auth user to set password at first login

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linux-howto

http://unix.stackexchange.com – When I create a new user account I ask users to send me a public key, and want to force users to set the password the first time they log in with keypair authentication. If I create an account with an impossible/disabled and expired password, but put a pubkey in their .ssh/authorized_keys file, the user is required to change his password at first login, but cannot enter his current one! # adduser --disabled-password foo … # chage -d0 foo What is a more appropriate way to go about this? (HowTos)