How to Configure HTTP/HTTPS Proxy on Linux and Windows (CLI, GUI, Registry, and APT)
Set up proxy access correctly on Windows and Linux for command-line tools, package managers, and system-level use. This guide covers quick commands, persistent configuration, and common troubleshooting steps.
Linux pmap Command Guide: Inspect Process Memory Maps with Practical Examples
Learn how to use the Linux pmap command to inspect per-process memory mappings, compare output modes, and troubleshoot high memory usage quickly. This updated guide includes workflow steps, command examples, and interpretation tips.
iostat Command Guide for Linux: 20 Practical Examples for CPU and Disk I/O Troubleshooting
Learn how to use iostat to monitor CPU and storage performance on Linux systems. This revised guide covers installation, 20 practical commands, metric interpretation, and a troubleshooting workflow.
xargs in Linux: Practical Commands, Safe Patterns, and Pipeline Workflows
This guide explains how to use xargs effectively in Linux/Unix shells, from basic stdin handling to safe file operations and parallel execution. You’ll learn practical command patterns, portability caveats, and safer alternatives.
Linux mount and umount Commands: Practical Examples, /etc/fstab, and Safe Unmounting
Learn how to mount and unmount filesystems reliably on Linux, from one-off commands to persistent /etc/fstab entries. This guide covers common filesystem types, command comparisons, and safe troubleshooting steps.
How to Use gsh to Run Linux Commands Across Multiple Servers
gsh (Group Shell) lets you execute one command across many Linux hosts from a single terminal. This guide explains host grouping with /etc/ghosts, core options, and practical command patterns.
Linux System Administrator Responsibilities: Daily Operations, Privileges, and Best Practices
Linux system administrators are responsible for server reliability, security, access control, patching, backups, and troubleshooting. This updated guide maps those responsibilities to practical workflows and command examples.
Common UNIX Commands and Utilities: Practical Reference for DevOps and Sysadmin Work
A structured UNIX command reference organized by real operational tasks: discovery, files, processes, networking, text processing, and job control. Includes C-shell notes, comparison tables, and practical command examples.
UNIX sed Quick Reference: Print and Delete Lines with Address and Pattern Ranges
Use this sed quick reference to print or delete exact lines, ranges, and regex matches without opening an editor. It also highlights GNU vs POSIX differences and safer in-place editing patterns.
Install Subversion (SVN) on Linux: Package Install, Source Build, Apache Setup, and Authentication
Learn how to install Subversion on Linux, create a repository, and publish it through Apache with user authentication. This revised guide includes both package-based and legacy source-build paths with practical commands.
Unix grep Quick Reference: Patterns, Options, and Real Command Examples
grep is the core Unix command for searching text by pattern across files or standard input. This revised quick reference covers syntax, high-value options, and practical examples you can use immediately.
Apache Ant: Set the Current User Home Directory with env.HOME (and Safe Fallbacks)
Learn how to read the logged-in user’s home directory in Ant using env.HOME, then make it portable with a user.home fallback. Includes build.xml patterns you can use in local builds and CI.
Unix Basics for DevOps Engineers: Commands, Permissions, Pipes, and Workflow
This revised guide turns a legacy Unix slide embed into a practical reference for beginners and DevOps engineers. Learn core Unix concepts, essential commands, and command execution flow with hands-on examples.
Java Installation Guide in Linux & Windows
DOWNLOAD OPEN JDK & JRE JAVA PACKAGE FROM – https://jdk.java.net/archive/ Download and Install JDK/JRE 7 in Centos & RHEL Download and Install JDK/JRE 8 in Centos &…
Linux Tutorials: Commands for Linux Administrator
1. sudo – Execute commands with elevated privileges, a fundamental for system administration. 2. useradd – Create a new user account, essential for managing user access. 3….
Linux Tutorials: How to troubleshoot Linux Server?
If a linux-build-server suddenly starts getting slow, I would divide my approach / troubleshooting into 3 section as follows; System Level troubleshooting Application Level troubleshooting Dependent Services troubleshooting…
What is Linux and use cases of Linux?
What is Linux? Linux is an open-source, Unix-like operating system kernel first created by Linus Torvalds in 1991. It serves as the foundation for a wide range…
Jenkins Tutorial: Install Jenkins on Ubuntu
In this tutorial we are going to install Jenkins on Ubuntu operating system. Ubuntu is another debian based operating system – open sourced and highly loved by…
Linux Performance Monitoring Guide
CPU Memory Network Storage Device and Input I/O Storage Capacity Storage Controller CPU Memory and I/O Interconnect Rajesh KumarI’m Rajesh Kumar, a DevOps, SRE, DevSecOps, Cloud, and…
Linux Tutorials: mpstat commands examples
mpstat – Report processors related statistics. The mpstat command writes to standard output activities for each available processor, processor 0 being the first one. Global average activities…
Linux Tutorials: vmstat commands examples
The vmstat command (short for virtual memory statistics) is a built-in monitoring utility in Linux. Users can observe system activity virtually in real-time by specifying a sampling…
Linux Tutorials: Commands for Linux User
ls – List directory contents. cd – Change the current directory pwd – Print the name of the current working directory. touch – Create an empty file…
5 ways to split your Linux terminal multiplexer
List of Most Popular Free Linux Terminal Tmux GNU Screen Konsole Emacs Tilix Terminator MobaXStrem mRemoteNG Shells, terminals, and consoles The short version: A shell is an…
[SOLVED] Laravel : Supervisor FATAL/BACKOFF Exited too quickly (process log may have details)
Problem I’m trying to use Laravel queues with a supervisor but the service is not working properly. When I try to check status:$ sudo supervisorctl status$ laravel-worker:laravel-worker_00:…
Modules in Apache Web Server
Core Modules New functions are in the form of modules. Every module has their own directives Easy to download,install and configure Define modules, use their syntaxes to…
Directory Structure of Apache Web Server
Apache HTTPD – Directory Structure CORE/common Directories conf modules htdocs logs New structure in Yum/RPM base installation conf conf.d conf.modules.d modules htdocs logs Structure in Tarball/source code…
Installation Of Apache HTTP Web Server
How many ways you can install Apache? Installation Types1.Yum Based2.RPM Based3.Source code/ Tar ball Based Apache install on Centos 7 (Yum Base) 1.Check OS version # cat…
What is LAMP Stack?
What is Stack? The term stack(derived from “solution stack”) refers to a collection of different software programs that “stack” together to create a plateform necesary to support…
Best practices to secure your Apache Web Server
Server Version Banner should be removed. I’d say this is one of the first things to think about, because you don’t want to reveal your web server…
Best Practices of Linux Security
User Security Password Security Securing the root account File System Security System Security User Security Avoid shared accounts Ensure each user is assigned a unique account name…