GPG Tutorial

• Using GnuPG with Sylpheed (Email Client) here
• Can you extend the expiration date of an already expired GPG key? here
• Making, Verifying, Clearsigned, Signatures here
• Using Trust & Verifying here
• Checking Fingerprints here
• Exporting all your Public Keys here
• Recommended word wrap settings for Gmail & GPG here
• Adding additional comments to your signature here
• Solving Error "invalid auto-key-locate list" here
• Solving another error "gpg: invalid armor header:" here
• Comments added like the following: --comment "Public Key at - http://bit.ly/hRfb9z" --comment "Homepage - http://bit.ly/erbpJY"
• Error regarding key being newer than signature here
• How to use a revocation certificate here
• Generating a revocation certificate with gpg here 

Example: Display GPG usage commands

gpg --help

Example: Digitally signing and Verifying a key

gpg --sign-key KEY

gpg --check-sigs KEY

Example: Verifying a file by its accompanying digital signature file

gpg --verify FILE.sig FILE

Example: Adding a public key from a server

gpg --keyserver KEYSERVER --recv-key KEY

Example: Importing a Public key from a file

gpg --import FILE.asc

Example: Trusting a key

gpg --edit-key EMAIL

trust

4

quit

gpg --keyserver KEYSERVER --refresh-keys

gpg --list-keys

Example: Signing a file with a separate binary signature file

gpg -b FILE

Example: Verifying a file by its accompanying ASC file

gpg --verify FILE.asc FILE

Example: List private key(s)

gpg --list-secret-keys

Example: Clearsign a TXT document

gpg --clearsign DOCUMENT.txt

Example: Displaying a keys fingerprint

gpg --fingerprint KEY

Example: Importing Private key(s) from an ASC file

gpg --allow-secret-key-import --import FILE.asc

Example: Importing public key(s) from an ASC file

gpg --import FILE.asc

Example: Exporting your public key(s)

gpg --export --armor --output FILE.asc

Example: Reload the agent

gpg-connect-agent reloadagent /bye

Example: Deleting your Private and Public Keys from your Keyring

gpg --delete-secret-key KEY

gpg --delete-key KEY