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certbot error fix

Nick Gully, Denver

If you are getting the error:

Attempting to renew cert from /etc/letsencrypt/renewal/example.com.conf produced an unexpected error: At least one of the required ports is already taken.. Skipping.

Add hooks to start and stop your webserver in certbot’s cron job:

0 */12 * * * root test -x /usr/bin/certbot -a ! -d /run/systemd/system && perl -e ‘sleep int(rand(3600))’ && certbot -q r enew –pre-hook “service nginx stop” –post-hook “service nginx start”