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added openpgp and linked it

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Marten B. Kante
2025-11-22 08:45:19 +01:00
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wiki/linux/gpg.md
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# GPG
[GNU Privacy Guard](https://gnupg.org/) - short GnuPG or just GPG - is a free and open-source
implementation of OpenPGP from [RFC 4880](https://datatracker.ietf.org/doc/html/rfc4880).
implementation of [OpenPGP](/wiki/openpgp.md).
It is used to savely encrypt and decrypt messages or files using assymetric encryption.
## Setup
@@ -13,6 +13,15 @@ Sometimes it is also called `gnupg2`.
This section addresses the usage of the Open GPG.
### List or Find a Key
To find a key use the following command.
`<query>` is a search string and is optional.
```sh
gpg --list-keys <query>
```
### Generating a Key Pair
A fast way to generate a key pair is by running the following command.
@@ -104,6 +113,27 @@ gpg --recv-key <id>
gpg --lsign <id>
```
### Managing Multiple Users and E-Mails of an Existing Secret Key
A secret key can have more than one e-mail assigned to it.
After generating the key however only a single user is added by default.
To add another one use the following command where `<key-id>` is the id of the key to add the
e-mail to.
```sh
gpg --edit-key <key-id>
```
Afterwards a console will open.
Using `adduid` another user can be added by following the on-screen instructions.
Afterwards `save` will save the progress and exit from the console.
To delete an existing user and e-mail also open the edit-console.
Then list the existing users using the command `uid` and select the user id of the key to delete
with `uid <id>` where `<id>` is the key to delete.
Then delete it with `deluid` and save with `save`.
## Troubleshooting
This section will focus on errors and the fixing of errors of GPG.

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wiki/openpgp.md Normal file
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# OpenPGP
[OpenPGP](https://www.openpgp.org/) is the most widely used encryption standard proposed in from
[RFC 4880](https://datatracker.ietf.org/doc/html/rfc4880).
## Setup
There are different implementations of OpenPGP.
Many [Linux](/wiki/linux.md) [package managers](/wiki/linux/package_manager.md)
package the implementation called [Gnu Privacy Guard](/wiki/linux/gpg.md) in the `gnupg` or
sometimes also `gpg` or `gpg2` package.

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wiki/thunderbird.md
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The following section addresses different uses and add-ons of Thunderbird.
### Changing the (dark/light) Theme
### Use PGP Key for Encryption, Decryption and Signing
Thunderbird can use [OpenPGP](/wiki/openpgp.md) to sign, encrypt or decrypt mails.
To add this navigate to the `Account Settings` under `Edit` and then select the mail to add the PGP
key to and `End-to-End Encryption`.
There keys can be added by selecting `Add Keys...` and afterwards the private key can be selected
for encryption, decryption and signing.
This however is only possible if the key is issued to the same e-mail it should be added to.
### Enable Spell Checking of a Specific Language
Spell checking can be changed in the `Settings` from the `Edit` tab.
The configuration can be done under `Composition` in the `Spelling` section.
There are two checkboxes to specify when the spell checking should occur.
And under `Languages:` various and also multiple languages can be checked.
To add another language follow the link and navigate to the language to install.
Then install only dictionary since the language pack is not needed.
### Changing the (Dark/Light) Theme
This section is based on a
[superuser comment by blnks](https://superuser.com/questions/1757333/how-can-i-view-thunderbird-in-full-dark-mode).