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7.7 Put a passphrase into the cache.

The gpg-preset-passphrase is a utility to seed the internal cache of a running gpg-agent with passphrases. It is mainly useful for unattended machines, where the usual pinentry tool may not be used and the passphrases for the to be used keys are given at machine startup.

Passphrases set with this utility don’t expire unless the --forget option is used to explicitly clear them from the cache — or gpg-agent is either restarted or reloaded (by sending a SIGHUP to it). Nite that the maximum cache time as set with --max-cache-ttl is still honored. It is necessary to allow this passphrase presetting by starting gpg-agent with the --allow-preset-passphrase.