Quote:
Originally Posted by SHADOW(5)
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).
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Code:
cat ROOT/etc/shadow
root:!:10933:0:99999:7:::
So, yeah, since it's the password field, setting a password unlocks it.