GPG cheat sheet

Install GPG on Debian/Ubuntu

$ sudo apt install gnupg

Create a key

$ gpg --full-generate-key

List keys

$ gpg --list-keys --fingerprint

Export my public key

$ gpg --export -a "My Name" > myname.asc

Export my private key

$ gpg --armor --export-secret-keys "My Name" > myname.asc

Sending and encrypting a file

1. First, get recipient's public key and send them mine.
2. Import their key:

   $ gpg --import recipient.asc
   

   Check that the key was imported successfully by listing the keys available on my machine.

3. Encrypt file for recipient:

   $ gpg -e -u "My Name" -r "Their Name" test.txt
   

Decrypting a file

$ gpg -d test.txt.gpg

Encrypting a file for myself

$ gpg -e -r "My Name" test.txt

Delete a previously added public key

$ gpg --delete-key keyId

keyId can be found with gpg --list-keys

Delete my own key

1. First, delete the private key:

   gpg --delete-secret-key keyId
   

2. Then delete the public key:

    gpg --delete-key keyId