📅 最后修改于: 2023-12-03 15:29:27.255000 🧑 作者: Mango
In Linux, APT (Advanced Package Tool) is a package manager used for installing and updating software packages. APT uses a keyring system for authentication of packages and repositories. The apt-key command manages the authentication keys used to verify the integrity of packages and repositories.
The apt-key command is a powerful tool used to manage GPG (GNU Privacy Guard) keys used for package signing. It allows importing and exporting keys to and from the keyring in the ASCII-armored, binary, and URL-encoded formats.
To export a key from the keyring, use the following command in the terminal:
apt-key export <KEYID> > key.asc
Where <KEYID> is the identifier of the key that you want to export, and key.asc is the desired filename of the exported key.
To import a key into the keyring, use the following command:
apt-key add key.asc
Where key.asc is the filename of the key that you want to import.
The ASCII-armored format is a text format that can be safely transmitted over email or other plaintext mediums. It is also the most commonly used format for exporting and importing APT keys.
The binary format is a binary encoded format used for keyrings and other binary data.
The URL-encoded format is a text format used for encoding binary data in a URL-friendly format.
Exporting a key:
apt-key export 12345678 > pubkey.asc
Importing a key:
apt-key add pubkey.asc
In conclusion, the apt-key command is a useful tool for managing GPG keys used in APT package authentication. Its ability to export and import keys in different formats allows for flexibility in key exchange between different systems.