A comprehensive guide to eBPF-based observability architecture, covering eBPF fundamentals, implementation patterns, and building modern monitoring solutions for cloud-native applications.
Complete guide to IPVS (IP Virtual Server) for high-performance Layer 4 load balancing in Linux
A practical guide to syslog — message format, rsyslog configuration, TLS transport, forwarding from systemd/journald, and integrating with modern log stacks.
Complete OpenVPN setup guide — server installation, PKI with easy-rsa, client configs, modern cipher suite, two-factor auth, and performance tuning.
Master tcpdump for professional network analysis. Learn advanced capture techniques, BPF filters, scripting, performance optimization, and production debugging.
Complete WireGuard VPN setup guide — server installation, client configuration, routing, DNS, multi-peer management, and troubleshooting.
Complete guide to Linux system monitoring. Learn about top, htop, sar, prometheus, grafana, and monitoring server performance.
Learn AppArmor fundamentals - profile-based mandatory access control that secures Linux systems through application confinement and fine-grained permissions.
Master Arch Linux - rolling release, pacman package manager, AUR, system administration, and building custom installations from scratch.
Master BPF and eBPF - write efficient kernel programs for networking, observability, security, and performance analysis on Linux systems in 2026.
Comprehensive guide to Btrfs filesystem covering copy-on-write, snapshots, subvolumes, RAID, compression, and data integrity features for 2026.
Master DNS and DHCP on Linux - configure Bind, dnsmasq, DNS resolution, DHCP servers, and network configuration for robust infrastructure.
Master ext4 and XFS - the dominant enterprise file systems on Linux. Learn features, performance tuning, administration, and when to choose each.
Master Fedora Server - RPM package management, DNF, SELinux, container tools, Cockpit management, and enterprise features for modern infrastructure.
Master Linux firewalls with iptables and nftables - comprehensive guide to packet filtering, NAT, and network security for 2026.
Master KVM virtualization on Linux - hypervisor setup, VM creation, storage, networking, and advanced management with libvirt and virsh.
Comprehensive guide to the Linux boot process covering BIOS/UEFI, bootloaders (GRUB, systemd-boot), kernel initialization, initramfs, and systemd. Master troubleshooting and optimization.
Comprehensive guide to Linux networking stack covering protocol layers, network interfaces, routing, packet flow, and network performance optimization.
Comprehensive guide to Linux performance tuning covering sysctl parameters, kernel optimization, memory management, network tuning, and filesystem performance.
Master Linux security hardening with sysctl tuning, firewall configuration, secure defaults, and production best practices for 2026.
Comprehensive guide to LXC and LXD covering system containers, container management, networking, storage, and use cases for Linux containers.
Explore lightweight container OS - RancherOS history, MicroOS, immutable infrastructure, and running containers directly on metal for modern infrastructure.
Master Linux performance profiling with strace, perf, and system analysis tools - diagnose issues, optimize applications, and understand system behavior.
Master systemd including units, services, targets, journald, systemctl commands, and troubleshooting for modern Linux administration.
Master ZFS on Linux - storage pools, snapshots, data integrity, RAID, compression, and advanced features for robust enterprise storage in 2026.
Comprehensive guide to Linux distributions in 2026. Explore Ubuntu, Fedora, Debian, Arch, and specialized distros for desktop, server, and cloud.
Comprehensive guide to WireGuard - the modern VPN protocol. Learn about WireGuard installation, configuration, server setup, client configuration, and network security.
Mastering Bash shortcuts transforms the terminal from a place you type slowly into a place you work fast. These shortcuts are built into …
A complete guide to configuring Caddy server for static websites — HTTPS, compression, logging, caching, redirects, and reverse proxy examples.
Guide to installing, configuring, and maintaining the OpenSSH server (sshd) on Linux systems.
A guide to open source mirror sites worldwide — speed up package downloads for apt, pip, npm, Maven, and more with the right mirror.
学习Linux Shell命令行快捷键，包括如何安全取消命令、编辑命令、快速导航等提高效率的技巧。
构建自己的Linux内核模块 模块的安装与卸载 Building Your Own Linux Kernel Module
为什么说磁盘操作很费时间，磁盘IO操作指令和普通表达式指令所消耗的时间对比
Master Linux LVM to flexibly manage disk space. Learn about PV, VG, LV concepts, creation, resizing, snapshots, and production best practices.
strace is a powerful Linux command for tracing system calls and signals. Learn to debug, troubleshoot, and analyze program behavior.
这个方法有问题，不能正常工作。crontab任务不执行。
如果服务器在机房，机房没有专门的员工来维护，又没有建立KVM系统，在调试iptables时一旦误操作，就可能会将自己拦在机器之外。要避免这个问题，有一个小技巧，以防万一。
注意在调试好后，真正上线生产环境时，停止执行这个脚本。
在 …
Iptables router
CentOS默认防火墙规则解释，CentOS Default Iptables Rules
[root@ctos ~]# cat /etc/sysconfig/iptables
# Generated by iptables-save v1.4.7 on Wed Aug 5 20:11:35 2015
*filter
:INPUT DROP [3:635] …深入学习Shell字符串操作，包括获取长度、截取、替换、模式匹配等常用技巧。
Master the ss command for network socket analysis. Learn to monitor TCP/UDP connections, filter socket states, and troubleshoot network issues effectively.
Linux下多个IP设置，Linux Multi IP Setup
Master the dig command for DNS lookups. Learn query types, tracing, troubleshooting, and advanced DNS diagnostic techniques.
A practical reference for essential Linux shell commands — process management, networking, file operations, text processing, and system monitoring.
Resolve dynamic library errors in Linux. Learn to identify, fix, and prevent library loading issues including version mismatches and missing dependencies.
Master the df command in Linux to monitor disk usage, identify storage issues, and manage file systems effectively. Includes practical examples and advanced usage.
VirtualBox Host-Only Network Setup
A complete guide to installing software on Linux — using package managers (apt, dnf, pacman), installing from source, and managing dependencies.
Linux服务器迁移完整清单，包括数据备份、配置迁移、服务迁移和验证步骤。
A complete wget guide covering single and batch file downloads, recursive mirroring, authentication, rate limiting, and practical shell scripting examples.
A complete guide to setting up SSH key-based authentication — generating keys, copying to remote hosts, managing multiple keys, and security best practices.