It doesn’t take rocket science to set up and run a web server in the AWS cloud. Here is a down-to-earth, step-by-step primer for adventurous newbies.
Finding errors in a postfix log file is tedious work. The job gets even more complicated if you have to dig through old postfix log files which might no longer be relevant. logrotate comes to the rescue, but only if you configure it correctly. Here is how you can do it on Fedora.
[Updated 2022-11-30] This post explains how to set up robust security headers in NGINX to protect your web application from malicious payloads and other forms of attacks. Choose your HTTP(S) headers wisely.
Problems signing in to AWS? When the login page “Sign in as IAM user” repeatedly says: “Your authentication information is incorrect. Please try again” though you entered correct information, your Gemalto token generator for MFA authentication could be out of sync.