Linux and Bash Scripting for DevOps
Follow this page to master Linux and Bash scripting - skills essential for automating DevOps tasks efficiently and specifically structured to help you crack DevOps interviews with confidence
Important Concepts in Linux and Bash Scripting for DevOps
Linux Introduction & Basics
✦ What is Linux ? History and distributions
✦ Linux desktop vs. server editions
✦ Installing Linux (virtual machines, dual boot, cloud)
✦ Navigating the Linux filesystem and directory hierarchy
✦ Essential command-line navigation (ls, cd, pwd, etc.)
✦ File and directory management (cp, mv, rm, mkdir, touch)
Linux Command Line Skills
✦ Viewing and editing files (cat, less, more, nano, vim)
✦ Text processing tools (grep, awk, sed, sort, uniq, cut, tr, wc)
✦ Working with permissions and ownership (chmod, chown, chgrp)
✦ Links: soft vs. hard links (ln)
Linux Filesystem & Disk Management
✦ Understanding filesystems and partitions
✦ Mounting and unmounting devices
✦ Disk usage and management (df, du, fdisk, lsblk)
✦ File system hierarchy standard (FHS)
✦ Inodes and file attributes
✦ Archiving and compressing (tar, gzip, zip, unzip)
Linux User & Group Management
✦ Creating, deleting, and managing users and groups (useradd, userdel, groupadd, passwd)
✦ User permissions and access control
✦ Password management and policies
Linux Package Management
✦ Installing, removing, and updating packages (apt, yum, dnf, rpm, snap)
✦ Managing repositories
✦ Building and installing software from source
Linux System Administration Basics
✦ System configuration files and structure
✦ System logging and log file analysis (journalctl, /var/log)
✦ Service management (systemd, service, chkconfig)
✦ Starting, stopping, and checking status of services
✦ Cron jobs and task scheduling (crontab, at)
Linux Process & Resource Management
✦ Listing and managing processes (ps, top, htop, jobs)
✦ Foreground/background processes (&, fg, bg, nohup)
✦ Process signals and priorities (kill, nice, renice)
✦ Memory and CPU monitoring (free, vmstat, uptime)
Linux Networking Fundamentals
Network configuration and interfaces (ifconfig, ip, nmcli)
✦ IP addressing, subnetting, and routing basics
✦ DNS and hostname configuration
✦ Network troubleshooting tools (ping, traceroute, netstat, ss)
✦ Network services (SSH, FTP, SCP, rsync)
Linux Security & Hardening
✦ Firewall configuration (iptables, firewalld, ufw)
✦ SELinux/AppArmor basics
✦ System auditing and intrusion detection
✦ Sudo and privilege escalation
Bash Scripting & Automation
✦ Shell scripting basics (bash, sh)
✦ Variables, loops, conditionals, functions
✦ Automating tasks and writing reusable scripts
✦ Debugging shell scripts
Backup, Recovery & Troubleshooting
✦ Backup strategies and tools (rsync, tar, dd)
✦ System recovery basics
✦ Troubleshooting common issues (logs, dmesg, systemctl, journalctl)
✦ Performance tuning and optimization
Linux Volume Management and Boot process
✦ Logical Volume Management (LVM)
✦ Boot process and boot loaders (GRUB)
✦ Kernel modules and customization .
Master Linux & Bash Scripting for DevOps : Real-World Automation, Monitoring & Scripting
Linux and Bash scripting are not just valuable but they’re essential. Able automate routine tasks, streamline deployments, manage infrastructure efficiently, and respond to incidents with precision is very important in DevOps and you must be comfortable at the terminal and at scripting.
Why Linux and Bash Matter in DevOps
- Automation at Scale : Bash scripts can automate server provisioning, code deployments, monitoring, backups, and more. This reduces manual errors and accelerates delivery pipelines.
- Universal Compatibility: Bash is available on nearly every Linux distro, making it the go-to tool for cloud, container, and on-prem environments.
- Interview Relevance : Practical scripting and hands-on automation are mandatory in most DevOps interview rounds.
What You’ll Learn Here
✦ Linux fundamentals
✦ Bash fundamentals
✦ Real-world Automation Scripts
✦ DevOps Interviews Questions
✦ Best scripting practices
Real Bash Scripts Every DevOps Engineer Should Know
- System Health Check : Quickly view server uptime, disk usage, and memory at a glance before a deployment.
- Automated Backups : Schedule file or database backups and send them to secure locations, enabling rapid disaster recovery.
- Deployment Automation: Pull latest code, update permissions, and restart services in one go.
- Monitoring and Alerting: Receive automatic email/pager alerts when disk, CPU, or memory crosses safe thresholds - preventing outages.
- User & Access Management: Effortlessly create users, manage permissions, and audit access.
Start from Zero, Grow to Expert
Whether you’re a total beginner or preparing next DevOps job, following this page means :
- Gaining hands-on experience that directly translates to real-world DevOps roles.
- Learning with scripts, code snippets, and real-world implementation projects.
- Building the scripting foundation to crack interviews.
Linux fundamentals such as distributions, file system navigation, and command-line basics
Filesystem and disk management including mounting, partitions, inodes, and compression tools
User and group management, permissions, and password policies
Package management with apt, yum, snap, and building from source
Core command-line operations: file manipulation, text processing tools (grep, awk, sed), permissions, and links
System administration essentials: configuration files, logging, service management, cron scheduling
Process and resource management tools (ps, top, kill)
Networking fundamentals: IP addressing, subnetting, DNS, routing, SSH connectivity, network troubleshooting tools
Security and hardening using firewalls (iptables, ufw), SELinux/AppArmor, sudo privileges, and auditing
Bash scripting basics with variables, loops, functions, and automation scripts
Backup and recovery methods along with troubleshooting common problems and performance tuning
Advanced topics like Logical Volume Management (LVM), boot process knowledge, and kernel modules