Linux Basics — Docs

Linux File Descriptors and Their Management
Learn about Linux file descriptors, how to view them, and how to increase limits for high-traffic server environments. 38 views
Linux Disk Management with fdisk and parted
A comprehensive guide to disk covering installation, configuration, and optimization for Linux VPS environments. 35 views
Managing Linux Users and Groups
Practical guide to users featuring real-world examples, performance tuning tips, and security best practices. 39 views
Crontab Syntax and Common Scheduling Patterns
A comprehensive guide to crontab covering installation, configuration, and optimization for Linux VPS environments. 33 views
Using journalctl for System Log Analysis
Everything you need to know about journalctl for your VPS, from initial setup to production-ready configuration with logs. 37 views
Linux Process Management with ps, top, and htop
Everything you need to know about process for your VPS, from initial setup to production-ready configuration with ps. 40 views
Systemd Service Files: A Complete Guide
Learn how to set up and configure systemd on your VPS with step-by-step instructions, including service and best practices for production environments. 36 views
Managing Shared Libraries on Linux
Learn how Linux shared libraries work, how to fix library not found errors, manage library versions, and use ldconfig to maintain the shared library cache. 247 views
How to Set Up a RAM Disk (tmpfs) for High-Speed I/O
Learn how to create and use tmpfs RAM disks for high-speed I/O, with practical use cases for PHP sessions, database temp tables, build caches, and test environments. 212 views
Understanding POSIX File Permissions vs ACLs
Learn the differences between standard POSIX file permissions and Access Control Lists (ACLs), with practical examples for web servers, shared directories, and multi-user environments. 265 views
How to Use rsyslog for Advanced Log Management
Learn to configure rsyslog for advanced log management including custom routing, remote forwarding, JSON formatting, and performance tuning on production Linux servers. 211 views
Understanding Linux Runlevels and systemd Targets
Understand Linux runlevels and systemd targets for managing boot behavior, switching system states, and troubleshooting startup issues on your server. 223 views
How to Use column, cut, and paste for Text Formatting
Master the column, cut, and paste commands for extracting, formatting, and merging text data on the Linux command line, with practical server administration examples. 191 views
Linux Hardlinks vs Softlinks: When to Use Each
Understand the differences between hard links and symbolic links in Linux, with practical guidance on when to use each for deployments, backups, and configuration management. 280 views
How to Trace System Calls with ltrace and strace
Learn how to use strace and ltrace to trace system calls and library calls for debugging application crashes, permission errors, hanging processes, and configuration issues. 233 views
Understanding EXT4 vs XFS vs Btrfs Filesystems
A detailed comparison of EXT4, XFS, and Btrfs filesystems covering performance characteristics, features, and recommendations for different server workloads. 358 views
How to Set Up Linux Namespaces for Process Isolation
Learn how Linux namespaces provide lightweight process isolation for PID, network, mount, and other resources — the foundation technology behind Docker containers. 244 views
Understanding D-Bus and Inter-Process Communication
Understand D-Bus, the Linux inter-process communication system used by systemd, NetworkManager, and other services, with practical examples using busctl and dbus-send. 162 views
How to Use ss Instead of netstat for Network Diagnostics
Master the ss command as a modern replacement for netstat, with examples for finding listening ports, counting connections, filtering by state, and monitoring network health. 309 views
Understanding Linux Capabilities vs Running as Root
Learn how Linux capabilities provide fine-grained privilege control as an alternative to running processes as root, with practical examples for web servers and network tools. 207 views
How to Use dmesg to Diagnose Hardware and Kernel Issues
Learn how to use dmesg to diagnose hardware problems, kernel errors, OOM events, disk failures, and network issues on your Linux server. 262 views
How to Manage Kernel Modules with modprobe
Learn how to manage Linux kernel modules with modprobe, including loading, removing, blacklisting, and setting parameters for hardware and feature support. 193 views
How to Create and Manage Linux Swap Partitions
Learn how to create, resize, and optimize Linux swap space, including swap file creation, swappiness tuning, and monitoring swap usage to detect memory pressure. 234 views
Linux Disk Scheduling Algorithms Explained
A guide to Linux disk I/O scheduling algorithms including none, mq-deadline, bfq, and kyber, with recommendations for different storage types and benchmarking instructions. 179 views
How to Use watch to Monitor Command Output in Real Time
Learn how to use the watch command to monitor command output in real time, with practical examples for system resources, processes, logs, and deployment monitoring. 223 views
Linux Process Priorities: nice and renice Explained
Learn how to use nice, renice, and ionice to control Linux process priorities for CPU and I/O scheduling, ensuring critical services get the resources they need. 203 views
How to Use xargs for Parallel Command Execution
Master xargs for batch processing and parallel command execution, with practical examples for file operations, database management, and server administration tasks. 256 views
Understanding /proc and /sys Virtual Filesystems
A deep dive into the /proc and /sys virtual filesystems, showing how to read process information, tune kernel parameters, inspect hardware, and build monitoring scripts. 294 views
Understanding Linux Memory Management: Buffers, Cache, and Free
Understand how Linux memory management works, why free memory is often low by design, and how to correctly interpret memory statistics using free, vmstat, and /proc/meminfo. 441 views
How to Use lsof to Find Open Files and Ports
Master the lsof command for finding which processes have files and ports open, diagnosing port conflicts, tracking deleted-but-open files, and troubleshooting file descriptor limits. 349 views
Understanding Linux Boot Process: From BIOS to Login
A comprehensive walkthrough of the Linux boot process from BIOS/UEFI through GRUB, kernel initialization, initramfs, systemd, to the login prompt, with diagnostic commands for each stage. 285 views
How to Use systemd-analyze to Debug Slow Boot Times
Learn how to use systemd-analyze to identify and fix slow boot times on your Linux server, with solutions for common bottlenecks like NetworkManager and Docker. 213 views
How to Use the find Command on Linux 59 views
How to Use awk for Text Processing 56 views
How to Use sed for Stream Editing 54 views
How to Set Up Linux Software RAID with mdadm 61 views
How to Manage Disk Partitions with fdisk and parted 60 views
How to Set Up LVM (Logical Volume Manager) 57 views
How to Use journalctl to Query System Logs 58 views
Understanding Linux Signals and Process Control
What Are Signals?Signals are software interrupts sent to processes in Linux to notify them of events. They are a fundamental mechanism for process control, a... 60 views
How to Work with Linux Archives: zip tar gz bz2 xz
Why Archives MatterArchives bundle multiple files into a single package for transfer, backup, or distribution. Understanding the common archive formats on Li... 56 views
How to Use the Linux at Command for Scheduled Tasks
What Is the at Command?While cron handles recurring scheduled tasks, the at command lets you schedule a one-time task to run at a specific future time on you... 54 views
How to Use jq for JSON Processing on the Command Line
What Is jq?jq is a lightweight command-line JSON processor. It allows you to parse, filter, transform, and format JSON data directly in your terminal. It is ... 54 views
How to Use LVM for Flexible Disk Management
How to Use LVM for Flexible Disk Management Logical Volume Manager (LVM) adds a layer of abstraction between your physical disks and filesystems, allowing yo... 56 views
How to Set Up Software RAID on Linux
How to Set Up Software RAID on Linux Software RAID uses mdadm to combine multiple disks into a redundant array, protecting your Breeze data against drive fai... 54 views
How to Use AppArmor for Application Security
How to Use AppArmor for Application Security AppArmor is a mandatory access control framework that confines applications to a limited set of resources. It ad... 52 views
How to Use strace for System Call Debugging
How to Use strace for System Call Debugging strace intercepts and records system calls made by a process, making it invaluable for diagnosing permission erro... 55 views
How to Manage Disk Encryption with LUKS
How to Manage Disk Encryption with LUKS LUKS (Linux Unified Key Setup) provides full-disk encryption for your Breeze, protecting data at rest from unauthoriz... 52 views
How to Configure Resource Limits with ulimit
How to Configure Resource Limits with ulimit Resource limits prevent any single process from consuming all available resources on your Breeze. The ulimit com... 56 views
How to Use Pipes and Redirection in Linux
How to Use Pipes and Redirection in Linux Pipes and redirection are fundamental Linux concepts that let you chain commands together and control where output ... 59 views
How to Use SSH Config for Managing Multiple Servers 188 views
Understanding Linux Environment Variables 95 views
Text Processing with grep, awk, and sed 227 views
How to Add and Manage Users on Linux 96 views
Understanding the Linux Filesystem Hierarchy 224 views
Understanding Linux File Permissions and Ownership 171 views
How to Use Cron Jobs for Task Scheduling 93 views
Working with tar and gzip: File Compression on Linux 70 views
Essential Linux Log Files and How to Read Them 66 views
Managing System Services with systemctl 251 views
How to Use tmux for Terminal Multiplexing 259 views
Managing System Time and NTP on Linux 61 views
Understanding Systemd Journal and journalctl 64 views
Using sed for Text Processing 58 views
Introduction to awk for Data Processing 60 views
Setting Up SSH Tunnels and Port Forwarding 60 views
How to Use the find Command Effectively 59 views
Understanding Linux Users and Groups 58 views
Working with tar and Compression 59 views
Environment Variables in Linux 55 views
Crontab Syntax and Scheduling Tasks 58 views
Managing Systemd Services 60 views
Disk Usage Analysis and Cleanup 63 views
Process Management on Linux 63 views
Essential Shell Scripting for Server Administration 62 views
How to Use the sed Stream Editor
sed performs text transformations on files from the command line.Replace Text# Replace first occurrence per line\nsed 's/old/new/' file.txt\n\n# Replace all occ... 97 views
How to Use the awk Text Processing Tool
awk is a powerful tool for processing structured text data.Print Columns# Print first column\nawk '{print $1}' file.txt\n\n# Print first and third columns\nawk ... 533 views
How to Use Symbolic and Hard Links
Links create references to files in different locations without copying data.Symbolic (Soft) Linksln -s /path/to/original /path/to/linkLike a shortcut. If the o... 366 views
How to Monitor File Changes with inotifywait
Watch files and directories for changes in real-time.Installapt install inotify-tools -yWatch a Directoryinotifywait -m -r /var/www/html/Watch for Specific Even... 80 views
How to Use xargs for Batch Operations
xargs converts standard input into command arguments for batch processing.Basic Usage# Delete all .tmp files\nfind /tmp -name "*.tmp" | xargs rm\n\n# Count line... 542 views
Essential Linux Commands Every Beginner Should Know
New to Linux? Here are the most important commands to get you started.Navigationpwd # Print current directory ls # List files ls -la # List with details and hid... 427 views
Understanding Linux File Permissions
File permissions control who can read, write, and execute files on your server.Permission Format-rwxr-xr-- 1 owner group 4096 Jan 1 12:00 file.txtThe permission... 373 views
How to Use the nano Text Editor
nano is a beginner-friendly text editor available on most Linux systems.Open a Filenano filename.txtKey ShortcutsCtrl+O — Save (Write Out)Ctrl+X — E... 119 views
How to Use the vim Text Editor
vim is a powerful text editor preferred by experienced Linux users.Open a Filevim filename.txtModesNormal mode — default mode for navigation and commandsI... 241 views
How to Use grep to Search File Contents
grep searches for text patterns within files. It's one of the most powerful Linux tools.Basic Searchgrep "search term" filenameUseful Options# Case-insensitive ... 258 views
How to Use find to Locate Files
The find command searches for files and directories on your server.Find by Namefind / -name "nginx.conf" find /var -name "*.log"Find by Type# Files only find /v... 298 views
How to Manage Users and Groups on Linux
Linux uses users and groups to control access to files and resources.User Management# Create user adduser newuser # Delete user userdel newuser # Delete user an... 96 views
How to Use tar to Archive and Compress Files
tar is the standard tool for creating and extracting archives on Linux.Create an Archive# Create gzip compressed archive tar -czf archive.tar.gz /path/to/direct... 419 views
How to Use wget and curl to Download Files
wget and curl are command-line tools for downloading files from the internet.wget# Download a file wget https://example.com/file.tar.gz # Download to specific l... 396 views
How to Use the Linux Package Manager
Package managers install, update, and remove software on your server.APT (Ubuntu / Debian)# Update package list apt update # Upgrade installed packages apt upgr... 301 views
How to Check Network Connections on Linux
Understanding network connections helps troubleshoot connectivity and security issues.Show Active Connectionsss -tulnFlags: -t TCP, -u UDP, -l listening, -n num... 276 views
How to Use screen and tmux for Persistent Sessions
Screen and tmux let you run long-running commands that survive SSH disconnections.screen# Start a new session screen -S mysession # Detach from session Ctrl+A, ... 448 views
How to Manage Environment Variables on Linux
Environment variables store configuration values that applications use at runtime.View Environment Variables# All variables env printenv # Specific variable ech... 314 views
How to Use systemd Timers Instead of Cron
Systemd timers are a modern alternative to cron for scheduling tasks.Create a Service UnitCreate /etc/systemd/system/mybackup.service:[Unit] Description=My Back... 345 views
How to Check Linux Distribution and Version
Different commands work on different Linux distributions. Here's how to identify what you're running.Universal Methods# Works on all modern distros cat /etc/os-... 227 views
How to Schedule a Server Reboot
Schedule a reboot during off-peak hours to apply kernel updates or maintenance changes.Reboot at a Specific Timeshutdown -r 02:00This schedules a reboot at 2:00... 451 views
Understanding Linux File Permissions and Ownership
Practical guide to permissions featuring real-world examples, performance tuning tips, and security best practices. 34 views
Linux Kernel Upgrade and Management Guide
A comprehensive guide to kernel covering installation, configuration, and optimization for Linux VPS environments. 32 views
Linux Package Management: APT vs DNF vs Zypper
Practical guide to apt featuring real-world examples, performance tuning tips, and security best practices. 34 views
Understanding Linux Kernel Parameters with sysctl
Everything you need to know about sysctl for your VPS, from initial setup to production-ready configuration with kernel. 33 views
Essential Linux Command Line Reference
| Command | Description | Example | 244 views
Using strace for System Call Debugging
Step-by-step tutorial for strace on Ubuntu/Debian servers, with practical code examples and troubleshooting tips. 35 views
Linux Environment Variables and Shell Configuration
Everything you need to know about environment for your VPS, from initial setup to production-ready configuration with variables. 32 views
Understanding Linux Signals and Process Control
Practical guide to signals featuring real-world examples, performance tuning tips, and security best practices. 36 views
Using screen and tmux for Session Persistence
Step-by-step tutorial for screen on Ubuntu/Debian servers, with practical code examples and troubleshooting tips. 34 views
Understanding /proc and /sys Virtual Filesystems
Practical guide to proc featuring real-world examples, performance tuning tips, and security best practices. 33 views
Understanding and Managing Swap Space
Step-by-step tutorial for swap on Ubuntu/Debian servers, with practical code examples and troubleshooting tips. 33 views
Linux I/O Scheduling and Disk Performance
Practical guide to io-scheduler featuring real-world examples, performance tuning tips, and security best practices. 29 views
Linux Filesystem Types Comparison: ext4, XFS, Btrfs
Practical guide to ext4 featuring real-world examples, performance tuning tips, and security best practices. 34 views