O seguinte, em /etc/sudoers
, deve fornecer o cache de credenciais por usuário e não por usuário por instalação:
Defaults !tty_tickets
De acordo com a página sudoers
man,
sudoers uses per-user time stamp files for credential caching. Once a user has been authenticated, a record is written containing the uid that was used to authenticate, the terminal session ID, and a time stamp (using a monotonic clock if one is available). The user may then use sudo without a password for a short period of time (5 minutes unless overridden by the timeout option). By default, sudoers uses a separate record for each tty, which means that a user's login sessions are authenticated separately. The tty_tickets option can be disabled to force the use of a single time stamp for all of a user's sessions.
É recomendável ou não usar esse recurso.