Linux Tutorials & Guides
Comprehensive, hands-on guides for Linux engineers. From fundamentals to advanced production patterns.
Linux filesystem internals: ext4, XFS, Btrfs, and tmpfs deep dive
Explore the internal architecture of ext4, XFS, Btrfs, and tmpfs including journaling, extents, copy-on-write,...
Hardware detection with udev, sysfs, and procfs
Use udev rules, sysfs, and procfs to detect hardware, create persistent device names, and control device permissions in...
Kernel module management with modprobe, DKMS, and blacklisting
Manage Linux kernel modules with modprobe, build out-of-tree drivers with DKMS, blacklist problematic modules, and sign...
Compiling a custom Linux kernel from source
Step-by-step guide to downloading, configuring, and compiling a Linux kernel from source, including initramfs...
Linux kernel architecture: monolithic design, modules, and versioning
How the Linux monolithic kernel works with loadable modules, the syscall interface, and the 6.x versioning scheme...
Resource monitoring and capacity planning with sar, vmstat, and iostat
Use sysstat tools, vmstat, cgroups v2 accounting, and trend analysis to monitor system resources and plan capacity on...
Building software from source on production Linux systems
Compile, package, and safely deploy software from source using configure/make, cmake, meson, checkinstall, FPM,...
Enterprise backup strategies with tar, dd, rsync, restic, and borg
Design and implement production backup workflows using tar incremental archives, dd disk imaging, rsync mirroring, and...
System messaging: wall, motd, issue, and login banners
Configure login banners, MOTD scripts, wall broadcasts, and SSH banners for operational communication and legal...
System recovery: kernel failures, root repair, and emergency targets
Recover from kernel panics, broken fstab entries, and corrupted bootloaders using emergency and rescue targets, chroot...
Secure Boot and bootloader hardening on Linux
Implement UEFI Secure Boot with MOK enrollment, sign custom kernels and modules, harden GRUB2 with password protection,...
systemd boot targets and init system deep dive
Explore systemd architecture from unit files and dependency graphs to boot targets, boot optimization with...