Linux Boot Process Explained Step by Step: BIOS, UEFI, GRUB Bootloader, Kernel & Systemd Tutorial fo

Master the complete Linux system boot process from power-on to login! This comprehensive tutorial breaks down every stage of how Linux boots, starting from BIOS performing Power On Self Test (POST) to check critical components like hard drives and RAM GeeksforGeeks, through bootloader initialization, kernel loading, and finally systemd taking control of your system.Learn the four critical stages: system startup with BIOS/UEFI firmware initialization, bootloader stage where GRUB loads the kernel, kernel stage where Linux decompresses and mounts the root filesystem, and the init process where systemd bootstraps user space KITRUM. We'll explore the differences between legacy BIOS and modern UEFI boot methods, including how GRUB installs as an EFI application in the ESP (EFI System Partition) and how the firmware locates grubx64.efi Medium to start your operating system.Perfect for Linux beginners, system administrators, and anyone preparing for Linux certification exams like RHCSA, LFCS, or CompTIA Linux+! Understand how systemd (PID 1) takes over from the kernel, loads services in parallel, and manages targets that replace traditional SysV runlevels Ecosmob TechnologiesDreamFactory. Topics covered: Master Boot Record (MBR) vs GPT partitioning, GRUB configuration, initramfs/initrd images, kernel parameters, systemd units and targets, boot troubleshooting, and recovery mode. Essential knowledge for DevOps engineers, cloud administrators, and Linux power users! #LinuxBootProcess #LinuxTutorial #GRUB2 #SystemdLinux #LinuxAdministration