Nella pagina http://manpages.ubuntu.com/manpages/trusty/it/man8/adduser.8.html c’è un paragrafo relativo ad adduser non tradotto:
adduser will copy files from SKEL into the home directory and prompt for finger (gecos) information and a password. The gecos may also be set with the --gecos option. With the --disabled-login option, the account will be created but will be disabled until a password is set. The --disabled-password option will not set a password, but login is still possible (for example with SSH RSA keys). To set up an encrypted home directory for the new user, add the --encrypt-home option. For more information, refer to the -b option of ecryptfs-setup-private(1). Cordiali saluti Paolo Inviato da Posta per Windows 10