notes: add info about gpg

notes/gpg.md

@@ -0,0 +1,33 @@
+# Generate key
+
+```sh
+gpg --full-generate-key
+```
+
+# GnuPG Backup
+
+References:
+
+- https://www.howtogeek.com/816878/how-to-back-up-and-restore-gpg-keys-on-linux/
+
+## Export keys
+
+```sh
+gpg --export --export-options backup --output public.gpg
+gpg --export-secret-keys --export-options backup --output private.gpg
+gpg --export-ownertrust > trust.gpg
+```
+
+## Import keys
+
+```sh
+gpg --import public.gpg
+gpg --import private.gpg
+gpg --import-ownertrust trust.gpg
+```
+
+## Verify
+
+```sh
+gpg --list-secret-keys --keyid-format long
+```

notes/ssh.md

@@ -12,6 +12,6 @@ ssh-keyscan localhost
 
 # Generate new ssh key
 
-```
+```sh
 ssh-keygen -t ed25519 -C "bob@example.com"
 ```