Positional parameters are Bash variables that hold arguments passed to a script or function. Learn how to use $1, $2, $@, $#, and the shift command in Bash.

Learn how to install OpenJDK and Oracle JDK on Ubuntu 24.04. Covers Java 21, 25, and other LTS versions.

Learn how to install and configure Git on Ubuntu 24.04 using apt, the Git PPA, or by compiling from source.

Learn three ways to install Node.js and npm on Ubuntu 24.04: NodeSource repository, nvm, and default Ubuntu packages.

Quick reference for SSH commands and configuration

Learn how to use Python dictionaries to store key-value data. Covers creating, accessing, updating, and iterating with examples.

Learn how to generate SSH keys on Linux using ssh-keygen, copy them to remote servers, and set up passwordless authentication.