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Debian GNU/Linux Reference Guide
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14.3 Managing GnuPG

Key management:

     $ gpg --edit-key user_ID               # "help" for help, interactive
     $ gpg -o file --exports                # export all keys to file 
     $ gpg --imports file                   # import all keys from file
     $ gpg --send-keys user_ID              # send key of user_ID to keyserver
     $ gpg --recv-keys user_ID              # recv. key of user_ID from keyserver
     $ gpg --list-keys user_ID              # list keys of user_ID
     $ gpg --list-sigs user_ID              # list sig. of user_ID
     $ gpg --check-sigs user_ID             # check sig. of user_ID
     $ gpg --fingerprint user_ID            # check fingerprint of user_ID
     $ gpg --list-sigs | grep '^sig' | grep '[User id not found]' \
       | awk '{print $2}' | sort -u | xargs gpg --recv-keys # get unknown keys
       # update keys for all unknown sigs.
     $ gpg --refresh-keys                   # update local keyring

Trust code:

     -         No ownertrust assigned / not yet calculated.
     e         Trust calculation has failed.
     q         Not enough information for calculation.
     n         Never trust this key.
     m         Marginally trusted.
     f         Fully trusted.
     u         Ultimately trusted.

The following will upload my key "A8061F32" to the popular keyserver hkp://subkeys.pgp.net:

     $ gpg --keyserver hkp://subkeys.pgp.net --send-keys A8061F32

Debian GNU/Linux Reference Guide
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