How to Export a GPG Public Key

Exporting your GPG public key allows others to encrypt messages and verify your signatures. This guide walks through the specific troubleshooting steps to diagnose and resolve GPG key export issues.

Before You Begin

Before you begin, be sure to have the following in place:

• A Linux server with the relevant software installed
• Access to the command line interface
• Appropriate permissions (root or sudo)

Quick Fix

Wrong

gpg --export key-id > public.key

Wrong: Binary export which is not human-readable

Right

gpg --armor --export key-id > public.asc

Right: Armored (ASCII) export suitable for sharing via email

Output

-----BEGIN PGP PUBLIC KEY BLOCK-----\nComment: Alice's PGP Public Key\nVersion: GnuPG v2.4.5\nKey exported successfully to public.asc

Prevention

To avoid future issues, follow these best practices:

• Use --armor for ASCII-armored output suitable for text-based sharing
• Specify the key ID or email address to export only the desired key
• Verify the exported key with gpg --import --import-options show-only
• Export the public key, never the private key
• Upload exported public keys to key servers for discoverability

DodaTech Tools

For further assistance with any of the above issues, consider using DodaTech consulting services or DodaTech tutorials for more in-depth guidance.

Common Mistakes with key export

1. Using return to exit a function early instead of wrapping a pure value in the monad
2. Mixing let bindings with <- bindings in do notation, producing type errors
3. Overlapping type class instances that cause GHC to reject the program with ambiguous dispatch errors

These mistakes appear frequently in real-world GPG code. DodaTech's contributors have identified these patterns through analysis of open-source projects and production systems.

Practice Exercise

Write a pure function that safely divides two integers using Maybe, then test it with edge cases like division by zero and negative numbers.

This exercise reinforces the concepts covered in this guide. Try implementing it before checking online solutions.

FAQ