Focused on sharing practical Linux technology content, covering Linux fundamentals, applications, tools, as well as databases, operating systems, network security, and other technical knowledge.
This article outlines six fundamental differences between Unix and Linux, covering shell standards, command options, make implementations, C compilers, GNU vs Linux distinctions, and the UNIX trademark, with practical guidance for writing portable code.
This article traces the historical development of network hardware, explaining how each device—from cables and repeaters to switches, routers, firewalls, and wireless APs—solves specific connectivity, distance, speed, security, and congestion challenges, culminating in modern home, enterprise, campus, and data center network architectures.
This article provides a comprehensive analysis of Kubernetes networking models, covering underlay (Flannel host-gw, Calico BGP) and overlay (Flannel VxLAN, Calico IPIP/VxLAN, Weave fastdp) approaches, with 16 diagrams illustrating CNI plugins, tunneling protocols, and hardware acceleration technologies like IPVLAN, MACVLAN, and SR-IOV.
This guide details four Linux disk cloning tools—dd, Partimage, Partclone, and Clonezilla—providing installation commands, step-by-step usage instructions, and key considerations like block size trade-offs and filesystem support to help you create reliable backups or migrate drives.
This comprehensive Docker tutorial covers container fundamentals, installation on CentOS, image and container management, Dockerfile creation, data volumes, networking, Docker Compose orchestration, registry setup, and production best practices with hands-on command examples.
This article comprehensively explains DDR memory principles, covering evolution from SDRAM to DDR5, double data rate and prefetch mechanisms, DDR subsystem architecture, DDR4 vs DDR5 comparisons including speed, voltage, DIMM architecture, burst length, and capacity, plus detailed terminology definitions for Channel, DIMM, Rank, Bank, and Bank Group.
This article provides a comprehensive guide to Linux performance analysis tools, covering vmstat, iostat, dstat, iotop, pidstat, top, htop, mpstat, netstat, ps, strace, uptime, lsof, perf, and advanced tools like eBPF, bcc, and Flame Graphs, with usage examples and output interpretation.
This comprehensive illustrated reference covers Vim's core keybindings across progressive learning levels — from basic navigation and editing to advanced visual mode operations — with practical examples for character, word, line, and screen movement, text insertion, editing, search, and file management.
This article outlines eight common mistakes Linux beginners should avoid after installation, including blindly running internet commands, overusing root privileges, deleting system files, adding untrusted repositories, distro-hopping, fearing the terminal, pushing Linux on others, and neglecting backups.
This article explains Linux system architecture covering kernel components (memory, process, device, network management), virtual file system (VFS), disk partitioning, mounting, inode/data block storage, hard vs soft links, and kernel parameter tuning via /proc.
