# keychain > Re-use ssh-agent and/or gpg-agent between logins. > More information: . - Check for a running ssh-agent, and start one if needed: `keychain` - Also check for gpg-agent: `keychain --agents "{{gpg,ssh}}"` - List signatures of all active keys: `keychain --list` - List fingerprints of all active keys: `keychain --list-fp` - Add a timeout for identities added to the agent, in minutes: `keychain --timeout {{minutes}}`