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Practical notes from the terminal

Hands-on guides to Oracle databases, Linux, and Android: real errors, root causes, and fixes you can paste.

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47 articles

Linux Runlevel

"run level" refers to a specific state of the operating system in which a certain set of services and daemons are running. There are several predefine...

A Admin Feb 8, 2026 · 1 min read 696

Linux Basic Commands

Linux is a command-line based operating system, which means that users interact with the system through the use of commands.

A Admin Feb 8, 2026 · 2 min read 782

Oracle Linux 6.7 Installation steps

This material describes how to install Oracle Linux 6.7 on a VM machine that can then be used as a seed to install Oracle software products, like Orac...

A Admin Feb 8, 2026 · 1 min read 1,954

FizzBuzz problem | Java program

Write a program that outputs the string representation of numbers from 1 to n. but for multiples of three it should output "Fizz" instead of the numbe...

A Admin Feb 8, 2026 · 1 min read 958