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Oracle Database 23ai : Group By and Having using Column Aliases

Starting with Oracle Database 23ai, you can use column aliases directly in the GROUP BY and HAVING clauses. This functionality was not available in earlier versions of Oracle Database.Example in Oracl...

25.04.2025 0 Read More

# Day 3 of My 30-Day Linux Challenge: Mastering Files and Directories

As part of my 30-day Linux Challenge to prepare for the RHCSA certification, Day 3 was all about learning how to manage files and directories in Linux. This is a core skill for any Linux administrator...

25.04.2025 0 Read More

Day 4 of My 30-Day Linux Challenge: Exploring Linux Permissions

As a beginner on my 30-day Linux Challenge to prepare for the RHCSA certification, Day 4 was all about understanding Linux permissions. Permissions are like locks that control who can access or modify...

25.04.2025 0 Read More

From Container to Root

Background In many companies, employees are often provided with limited user privileges. These accounts often lack sudo or root privileges, preventing direct access to install packages or m...

25.04.2025 0 Read More

Managing Users and Groups in Red Hat Linux

As a beginner on my 30-day Linux Challenge, focusing on Red Hat Linux, Day 5 was about learning how to manage users and groups. Users and groups are like the people and teams who use a Linux system, a...

25.04.2025 0 Read More

Remote access with RustDesk

Recently I traveled abroad and need a solution to use my workstation. I tried the RustDesk remote desktop. It needs a self-hosted server if you don't want to use their cloud solution and yet I don't w...

25.04.2025 0 Read More

Task Automation with Cron, Anacron, and Systemd Timers in Red Hat Linux

Welcome to Day 15 of the 30 Days of Linux Challenge! Today, I explored how Linux automates recurring tasks — saving time, reducing errors, and keeping systems healthy even without manual interventio...

25.04.2025 0 Read More

Understanding Types of Users in Linux

Introduction I’m continuing my 30-day Linux challenge as part of my preparation for the RHCSA exam and today’s topic is something that’s at the heart of Linux security and system manage...

25.04.2025 0 Read More

Introduction to Logical Volume Management (LVM) in Red Hat Linux

Welcome to Day 16 of the 30 Days of Linux Challenge! Today’s focus is on a foundational storage concept for system administration: Logical Volume Management (LVM).If you’ve ever needed to resize p...

25.04.2025 0 Read More

Fail2Ban: The Essential Security Tool for Preventing Attacks on Linux Servers

When managing a Linux server, security is one of the most important priorities. One common threat is brute-force attacks, where hackers try to gain access by repeatedly guessing passwords. Fail2Ban is...

26.04.2025 0 Read More

Oracle Database 23ai : Group By and Having using Column Aliases

# Day 3 of My 30-Day Linux Challenge: Mastering Files and Directories

Day 4 of My 30-Day Linux Challenge: Exploring Linux Permissions

From Container to Root

Managing Users and Groups in Red Hat Linux

Remote access with RustDesk

Task Automation with Cron, Anacron, and Systemd Timers in Red Hat Linux

Understanding Types of Users in Linux

Introduction to Logical Volume Management (LVM) in Red Hat Linux

Fail2Ban: The Essential Security Tool for Preventing Attacks on Linux Servers

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