Linux Limit SSH Access on Linux Allow or deny SSH? You may want to provide a secure and limited SSH access to your public hosts, using SSH keys. Here's a simple a way to do it.
Linux Secure FTP with Linux Secure FTP communication with your Linux host. These instructions apply for Ubuntu 18.04 and can easily be adapted for a vast majority of Linux platforms.
Java Multiple Java Versions If you use multiple versions of Java in your development environment, perhaps you wished there was a better way to switch from one to the other, instead of remembering to set the JAVA_HOME environment variable.
