## Key Administration

    With the systems comes a file that acts as somekind of database. In this file  all data regarding keys with the information that comes with the keys is stored (everything until the Ownertrust values: for more information on that read Key signing). With

    gpg --list-keys

      all present keys will be displayed. To see the signatures as well type:

     gpg --list-sigs

       (see  Key signing for further information).  To see the fingerprints type:

    gpg --fingerprint

      One wants to see "FingerabdrŸcken" to ensure that somebody is really the person they claim (like in a telephone call). This command will result in  a list of relatively small numbers.

    To list the secret keys you type:

    gpg --list-secret-keys

       Note that listing fingerprints and signatures from private keys has no use what soever.

    In order to delete a public key you type:

    gpg --delete-key UID

      For deleting a secrete key you type:

     gpg --delete-secret-key

    There is one more important command that is relevant for working with keys.

    gpg --edit-key UID

      Using this you can edit (among other things) the expiration date, add a  fingerprint and sing your key. Although it is too logic to mention. For this you need your passphrase. When entering this you will see a command line.