Debian e Ubuntu fornecem o pacote libpam-ccreds, que armazena as credenciais de login na rede. A partir da descrição do pacote:
This package provides the means for Linux workstations to locally authenticate using an enterprise identity when the network is unavailable. Used in conjunction with the nss_updatedb utility, it provides a mechanism for disconnected use of network directories. They are designed to work with libpam-ldap and libnss-ldap.