Linux on XSAH | Practical Journey to DevOps

Linux Foundations: Connecting the Pieces

Tue, 08 Sep 2026 20:50:32 +0330

Introduction

Learning Linux is not just about learning commands. It is easy to learn how to run ls, mount, chmod, ps, or systemctl individually. The more important step is understanding how these commands relate to the system underneath them.

Understanding Linux Processes and System Monitoring

Sun, 06 Sep 2026 19:42:35 +0330

Introduction

A Linux system is constantly running programs in the background.

From system services and daemons to shells and user applications, each running program needs CPU time, memory, and other system resources. Linux manages these running instances as processes.

From UEFI/BIOS to GRUB: Understanding the Linux Boot Process

Sat, 05 Sep 2026 12:17:32 +0330

Introduction

When a Linux system starts, several components work together before the first login prompt or graphical desktop appears.

The process begins with system firmware, continues through a bootloader, loads the Linux kernel and its initial userspace environment, and eventually hands control to systemd and the services it manages.

Linux Permissions, Ownership and umask

Fri, 04 Sep 2026 19:47:28 +0330

Introduction

Linux is a multi-user operating system, so it needs a way to control who can access files and directories and what they can do with them.

Permissions and ownership provide this basic access-control mechanism. They determine whether a user can read, modify, or execute a file, as well as whether they can access the contents of a directory.

Inodes, Hard Links and Symbolic Links

Thu, 03 Sep 2026 17:59:30 +0330

Introduction

When you work with files in Linux, you normally interact with names such as config.txt or /var/log/syslog. But underneath the filesystem hierarchy, Linux uses another layer of information to identify and manage the actual filesystem objects.

Mounting Filesystems and /etc/fstab

Wed, 02 Sep 2026 15:17:24 +0330

Introduction

Understanding the Linux filesystem hierarchy is only the first step. Knowing where directories such as /, /etc, /var, and /home are located does not yet explain how the storage behind that hierarchy is actually connected.

Understanding the Linux Filesystem

Tue, 01 Sep 2026 11:56:13 +0330

Introduction

One of the first things to understand when working seriously with Linux is how its filesystem is organized.

At first, the Linux filesystem can look like a collection of directories with familiar names such as /etc, /var, /home, and /tmp. But these directories are not arbitrary. Each one has a specific role, and understanding that role becomes increasingly important as we move from basic Linux administration toward DevOps.