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Linux Command Line Reference

$12

Essential and advanced Linux commands organized by category: files, processes, networking, permissions, text processing, and systemd.

📁 3 files🏷 v1.0.0
MarkdownJSONYAMLShell

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📁 File Structure 3 files

linux-command-reference/ ├── LICENSE ├── README.md └── config.example.yaml

📖 Documentation Preview README excerpt

Linux Command Line Reference

Version: 2.0.0 | Price: $12 | Format: Markdown + HTML + Shell script examples

Overview

A comprehensive desk reference for Linux command-line operations. Covers essential and advanced commands organized by category: file operations, process management, networking, permissions & users, text processing, systemd service management, disk & storage, and shell scripting patterns.

Designed for developers, sysadmins, DevOps engineers, and anyone who lives in the terminal.

Who Is This For?

  • Developers working on Linux servers and containers
  • System administrators managing Linux infrastructure
  • DevOps/SRE engineers automating server operations
  • Students preparing for Linux certifications (LPIC, RHCSA)

What's Inside

Cheatsheet Files (`cheatsheets/`)

FileTopics Covered
01-file-operations.mdls, cp, mv, rm, find, ln, tar, zip, rsync, file permissions in ls output
02-process-management.mdps, top, htop, kill, jobs, bg, fg, nohup, nice, strace, lsof
03-networking.mdip, ss, curl, wget, dig, nslookup, netstat, traceroute, iptables, nmap
04-permissions-users.mdchmod, chown, chgrp, umask, useradd, usermod, sudoers, ACLs, sticky bit
05-text-processing.mdgrep, sed, awk, cut, sort, uniq, tr, wc, diff, head, tail, xargs
06-systemd.mdsystemctl, journalctl, unit files, timers, targets, service management
07-disk-storage.mddf, du, mount, fdisk, lsblk, mkfs, fstab, LVM, swap, RAID
08-shell-scripting.mdVariables, conditionals, loops, functions, arrays, traps, parameter expansion

Example Files (`examples/`)

FileDescription
backup-script.shAutomated backup script with rotation, logging, and error handling
system-health-check.shSystem health monitoring script checking CPU, memory, disk, and services
log-analyzer.shLog file analyzer using grep, awk, and sort for pattern extraction

Quick Reference (`cheatsheet.html`)

A single self-contained HTML page with the most essential Linux commands in a printable two-column layout. Open in any browser or print to PDF.

How to Use

1. Unzip the product to any directory

2. Browse the cheatsheets/ folder for topic-specific references

3. Open cheatsheet.html in your browser for a printable quick reference

4. Copy scripts from examples/ and customize for your environment

5. Search within markdown files using your editor or grep -r "keyword" cheatsheets/

Format Notes

  • All cheatsheets are GitHub-flavored Markdown
  • Shell commands are shown with common flags and realistic examples
  • Each section includes a "Gotchas" table with common mistakes and fixes
  • Example scripts are POSIX-compatible where possible (noted when bash-specific)

Changelog

... continues with setup instructions, usage examples, and more.

📄 Code Sample .sh preview

examples/backup-script.sh #!/usr/bin/env bash # ============================================================================= # Automated Backup Script with Rotation # ============================================================================= # Creates timestamped tar.gz backups of specified directories, rotates old # backups to stay under a configurable retention limit, and logs all actions. # # Usage: # ./backup-script.sh # Use defaults # ./backup-script.sh /custom/source # Custom source directory # RETENTION_DAYS=14 ./backup-script.sh # Custom retention # # Cron example (daily at 2 AM): # 0 2 * * * /opt/scripts/backup-script.sh >> /var/log/backup.log 2>&1 # ============================================================================= set -euo pipefail # --------------------------------------------------------------------------- # Configuration (override via environment variables) # --------------------------------------------------------------------------- readonly BACKUP_SOURCE="${1:-/opt/myapp/data}" # What to back up readonly BACKUP_DEST="${BACKUP_DEST:-/var/backups/myapp}" # Where to store readonly RETENTION_DAYS="${RETENTION_DAYS:-30}" # Delete backups older than this readonly MAX_BACKUP_SIZE_MB="${MAX_BACKUP_SIZE_MB:-500}" # Warn if backup exceeds this readonly LOG_FILE="${LOG_FILE:-/var/log/myapp-backup.log}" readonly TIMESTAMP="$(date '+%Y-%m-%d_%H-%M-%S')" readonly BACKUP_FILE="${BACKUP_DEST}/backup-${TIMESTAMP}.tar.gz" readonly SCRIPT_NAME="$(basename "$0")" # --------------------------------------------------------------------------- # Logging # --------------------------------------------------------------------------- log() { local level="$1"; shift printf '[%s] [%s] [%s] %s\n' "$(date '+%Y-%m-%d %H:%M:%S')" "$level" "$SCRIPT_NAME" "$*" | tee -a "$LOG_FILE" } # --------------------------------------------------------------------------- # Cleanup on exit # --------------------------------------------------------------------------- cleanup() { local exit_code=$? if [[ $exit_code -ne 0 ]]; then log "ERROR" "Backup failed with exit code ${exit_code}" # Remove partial backup file if it exists [[ -f "$BACKUP_FILE" ]] && rm -f "$BACKUP_FILE" fi } # ... 84 more lines ...
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