$ set config
 # set system login user vyatta authentication public-keys [Key Name] type ssh-rsa
 # set system login user vyatta authentication public-keys [Key Name] key AAAAB3NzaC1yc2EAAAABIwAAAIEA1Vj31LQgkfgJuQYMrg1Nkf7DviaQPswUnDz/gI99sdWlecyRxg7b/ajH0/J4lAR4yAzpfVQ6NNhmZG97LazvZ+JAK1j6zJP801DWQYbUOLyfH6NC5yMKRBPZDOROf1CzQ39IO0d4cMeDchwT44mNY5mEdlwJtoAxhZvKvHPuF+E=
 # commit

key は id_rsa.puのbase64の内容を全て入力する