GPT vs MBR: Linux Partition Tables Explained
What GPT is, how it differs from MBR, how it relates to UEFI and BIOS boot, and how to inspect, create and convert partition tables on Linux.
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Linux
Linux server administration: Debian, Ubuntu, AlmaLinux, storage, performance and troubleshooting.
Linux Kernel Panic: Causes, Diagnosis and Recovery
What a Linux kernel panic is, common causes, how to read the message, recover a server that won’t boot, and capture crash logs.
Linux Swap File vs Swap Partition: Which Should You Use?
Swap files and partitions perform almost the same. When each makes sense, how much swap a server needs, and how to add and tune a swap file.
How to Partition Disks with GParted and parted
Resize, create and format partitions with GParted, know what can change while mounted, and do the same on servers with parted and growpart.
Fix SSH Disconnects: Keepalive and Timeout Settings
Stop idle SSH sessions from freezing: ServerAliveInterval on the client, ClientAliveInterval on the server, NAT timeouts, idle logout and tmux.
Ubuntu vs Debian for a Server: Which Should You Choose?
Ubuntu Server vs Debian for a VPS: release cycles and support length, package freshness, stability, defaults like snap, footprint, docs and community.
Linux Filesystem Journaling Explained: ext4, XFS and Btrfs
What a filesystem journal does, ext4 journaling modes, how XFS and Btrfs protect metadata, its limits, and how to check and repair filesystems.
Linux Disk Performance: How to Measure and Tune Storage
Benchmark Linux storage with fio, read iostat, find I/O-heavy processes, and tune schedulers, mount options and applications.
lsblk and blkid: List Disks, Partitions and UUIDs on Linux
See every disk and partition with lsblk, show filesystems and UUIDs with lsblk -f and blkid, identify a newly attached disk, and get output for scripts.
awk Command in Linux: Practical Examples for Columns and Logs
Use awk to print columns, filter rows, sum and count values, analyse web server logs, change field separators and write small reports from the command line.
Linux Server Performance Optimization: A Practical Method
A repeatable method for faster Linux servers: measure with the USE method, fix CPU, memory, disk and network bottlenecks, then scale.
How Linux Works: Kernel, Shell, Processes and Files
A beginner’s tour of Linux: what the kernel does, how the shell runs programs, processes and signals, systemd, and the filesystem layout.
Linux Groups: Create, Add Users and Share Directories
Manage Linux groups: list groups, create and delete them, add or remove users, apply membership without logging out, and set up shared team directories.
Keep an Ubuntu Server Minimal: Remove What You Do Not Need
Slim down an Ubuntu server: see what runs and listens, remove unneeded packages and services like snapd, skip recommends, clean up, and why minimal is safer.
apt Commands Cheat Sheet for Ubuntu and Debian
Manage packages on Ubuntu and Debian with apt: update vs upgrade, install, remove, purge, search, hold versions, clean up and fix broken packages.
sudo and sudoers: Configure Admin Rights on Linux Safely
Grant admin rights with sudo: sudo and wheel groups, visudo, drop-in files, limiting commands, NOPASSWD rules for automation and logging.
Best Linux Distro for a Server: Ubuntu, Debian, AlmaLinux, Rocky
Choose a Linux distro for your VPS or dedicated server: Ubuntu LTS, Debian, AlmaLinux, Rocky, CentOS Stream, Fedora and Alpine compared by use case.
strace Command: Debug What a Linux Process Is Really Doing
Use strace to trace system calls: find missing files and permission errors, attach to running processes, follow children, filter calls and time them.
Upgrade the Linux Kernel on Ubuntu, Debian and RHEL (Safely)
Keep the kernel updated: distribution updates vs HWE and backports kernels, rebooting safely, removing old kernels, falling back via GRUB, and live patching.
SSH Multiplexing: Faster Repeated Connections with ControlMaster
Reuse one SSH connection for many sessions with ControlMaster and ControlPersist: instant logins, faster scp, rsync and Ansible, and managing masters.
AlmaLinux vs Rocky Linux: Which RHEL Clone Should You Use?
AlmaLinux and Rocky Linux both replace CentOS. How they differ in governance, compatibility and extras, and how to choose or migrate.