Disable password on linux user with command

penguin_pam

Based on /etc/shadow(5) documentation on the second (password) field: encrypted password If the password field contains some string that is not a valid result of crypt(3), for instance ! or *, the user will not be able to use a unix password to log in (but the user may log in the system by other means). My question is whether there is a linux command to disable the user password,i.e. set a "*" or a "!" on password field.

Originally asked by trikelef on Stack Exchange (unix) (CC BY-SA 4.0).

uphilltech

Great question — answering as the UphillTech team:

You are looking for passwd -l user . From man passwd : Options: [...] -l, --lock lock the password of the named account. This option disables a password by changing it to a value which matches no possible encrypted value (it adds a '!' at the beginning of the password).

Full answer by Panki: https://unix.stackexchange.com/a/558592 (CC BY-SA 4.0).

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