newkey establishes new public keys for users and machines on the network. These keys are needed when using secure RPC or secure NFS service.
newkey prompts for a password for the given username or hostname and then creates a new public/secret Diffie-Hellman 192 bit key pair for the user or host. The secret key is encrypted with the given password. The key pair can be stored
in the /etc/publickey file, the NIS publickey map, or the NIS+ cred.org_dir table.
newkey consults the publickey entry in the name service switch configuration file (see nsswitch.conf(4)) to determine
which naming service is used to store the secure RPC keys. If the publickey entry specifies a unique name service, newkey will add the key in the specified name service. However, if there are multiple name services listed, newkey cannot decide which source to update and will display an error message. The user is required to specify the source explicitly with the -s option.
In the case of NIS, newkey should be run by the superuser on the master NIS server for that domain. In the case of NIS+, newkey should be run by the superuser on a machine which has permission to update the cred.org_dir table of the new user/host
In the case of NIS+, nisaddcred(1M) should be used to add new keys. newkey cannot be used to create keys other than 192-bit Diffie-Hellman.