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10.6.1 List of all commands and options

gpg-preset-passphrase is invoked this way:

gpg-preset-passphrase [options] [command] cacheid

cacheid is either a 40 character keygrip of hexadecimal characters identifying the key for which the passphrase should be set or cleared. The keygrip is listed along with the key when running the command: gpgsm --with-keygrip --list-secret-keys. Alternatively an arbitrary string may be used to identify a passphrase; it is suggested that such a string is prefixed with the name of the application (e.g foo:12346). Scripts should always use the option --with-colons, which provides the keygrip in a "grp" line (cf. doc/DETAILS)/

One of the following command options must be given:


Preset a passphrase. This is what you usually will use. gpg-preset-passphrase will then read the passphrase from stdin.


Flush the passphrase for the given cache ID from the cache.

The following additional options may be used:


Output additional information while running.

-P string
--passphrase string

Instead of reading the passphrase from stdin, use the supplied string as passphrase. Note that this makes the passphrase visible for other users.