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Linux System Administrator Roadmap

β”œβ”€β”€ πŸ”Ή Foundations
β”‚ β”œβ”€β”€ πŸ”Έ Basic Linux Concepts
β”‚ β”‚ β”œβ”€β”€ πŸ“‚ File System Hierarchy
β”‚ β”‚ β”œβ”€β”€ πŸ”‘ Permissions and Ownership
β”‚ β”‚ β”œβ”€β”€ πŸ”„ Processes and Daemons
β”‚ β”‚ └── πŸ–₯️ Basic Commands (ls, cd, cp, mv, rm, etc.)
β”‚ β”œβ”€β”€ πŸ”Έ Shell and Scripting
β”‚ β”‚ β”œβ”€β”€ πŸ“ Bash Scripting
β”‚ β”‚ β”œβ”€β”€ πŸ”§ Basic Automation
β”‚ β”‚ └── πŸ› οΈ Common Shell Commands (grep, awk, sed)
β”‚ β”œβ”€β”€ πŸ”Έ Networking Fundamentals
β”‚ β”‚ β”œβ”€β”€ 🌐 TCP/IP Stack
β”‚ β”‚ β”œβ”€β”€ 🌍 DNS Configuration
β”‚ β”‚ β”œβ”€β”€ πŸ”Œ Network Interfaces
β”‚ β”‚ └── πŸ› οΈ Basic Network Troubleshooting (ping, traceroute, netstat)
β”‚ └── πŸ”Έ System Installation and Configuration
β”‚ β”œβ”€β”€ πŸ’Ώ Installation Methods (ISO, PXE)
β”‚ β”œβ”€β”€ πŸ—‚οΈ Disk Partitioning and File Systems
β”‚ └── πŸ”’ Initial Configuration and Hardening
β”œβ”€β”€ πŸ”Ή System Administration
β”‚ β”œβ”€β”€ πŸ”Έ User and Group Management
β”‚ β”‚ β”œβ”€β”€ πŸ‘€ User Accounts
β”‚ β”‚ β”œβ”€β”€ πŸ‘₯ Group Policies
β”‚ β”‚ └── πŸ”‘ sudo Configuration
β”‚ β”œβ”€β”€ πŸ”Έ Package Management
β”‚ β”‚ β”œβ”€β”€ πŸ“¦ RPM and YUM (RHEL/CentOS)
β”‚ β”‚ β”œβ”€β”€ πŸ“¦ APT (Debian/Ubuntu)
β”‚ β”‚ └── πŸ”§ Compiling from Source
β”‚ β”œβ”€β”€ πŸ”Έ Process Management
β”‚ β”‚ β”œβ”€β”€ πŸ”„ Systemd and Init
β”‚ β”‚ β”œβ”€β”€ πŸ‘€ Monitoring and Controlling Processes
β”‚ β”‚ └── πŸ•’ Crontab and Scheduled Tasks
β”‚ β”œβ”€β”€ πŸ”Έ Filesystem Management
β”‚ β”‚ β”œβ”€β”€ πŸ—‚οΈ Mounting and Unmounting File Systems
β”‚ β”‚ β”œβ”€β”€ πŸ“ NFS and Samba
β”‚ β”‚ └── πŸ“Š Disk Quotas
β”‚ └── πŸ”Έ Security
β”‚ β”œβ”€β”€ πŸ”₯ Firewalls (iptables, firewalld)
β”‚ β”œβ”€β”€ πŸ›‘οΈ SELinux and AppArmor
β”‚ β”œβ”€β”€ πŸ”’ SSH Configuration and Hardening
β”‚ └── πŸ“ Auditing and Logging
β”œβ”€β”€ πŸ”Ή Networking and Services
β”‚ β”œβ”€β”€ πŸ”Έ Network Configuration
β”‚ β”‚ β”œβ”€β”€ 🌐 Static and Dynamic IP Addressing
β”‚ β”‚ β”œβ”€β”€ πŸ”Œ Network Bonding and Bridging
β”‚ β”‚ └── πŸ“Ά VLANs
β”‚ β”œβ”€β”€ πŸ”Έ Web Services
β”‚ β”‚ β”œβ”€β”€ 🌐 Apache and Nginx
β”‚ β”‚ β”œβ”€β”€ πŸ” HTTPS and SSL/TLS
β”‚ β”‚ β”œβ”€β”€ ↔️ Reverse Proxies
β”‚ β”‚ └── πŸ›‘οΈ Web Application Firewalls (WAF)
β”‚ β”œβ”€β”€ πŸ”Έ Database Management
β”‚ β”‚ β”œβ”€β”€ πŸ’Ύ MySQL/MariaDB
β”‚ β”‚ β”œβ”€β”€ πŸ’Ύ PostgreSQL
β”‚ β”‚ β”œβ”€β”€ πŸ“‚ NoSQL Databases (e.g., MongoDB)
β”‚ β”‚ └── πŸ”„ Backup and Restore
β”‚ β”œβ”€β”€ πŸ”Έ Email Services
β”‚ β”‚ β”œβ”€β”€ βœ‰οΈ Postfix and Sendmail
β”‚ β”‚ └── 🚫 Spam Filtering
β”‚ └── πŸ”Έ File and Print Services
β”‚ β”œβ”€β”€ πŸ“ Samba
β”‚ β”œβ”€β”€ πŸ“ NFS
β”‚ └── πŸ–¨οΈ CUPS
β”œβ”€β”€ πŸ”Ή Advanced Administration
β”‚ β”œβ”€β”€ πŸ”Έ Virtualization
β”‚ β”‚ β”œβ”€β”€ πŸ’» KVM and QEMU
β”‚ β”‚ β”œβ”€β”€ πŸ“¦ VirtualBox
β”‚ β”‚ └── πŸ”§ Libvirt
β”‚ β”œβ”€β”€ πŸ”Έ Containerization
β”‚ β”‚ β”œβ”€β”€ 🐳 Docker
β”‚ β”‚ β”œβ”€β”€ ☸️ Kubernetes
β”‚ β”‚ └── πŸ”§ Podman
β”‚ β”œβ”€β”€ πŸ”Έ Cloud Computing
β”‚ β”‚ β”œβ”€β”€ ☁️ AWS
β”‚ β”‚ β”œβ”€β”€ ☁️ Azure
β”‚ β”‚ β”œβ”€β”€ ☁️ OpenStack
β”‚ β”‚ └── ☁️ GCP (Google Cloud Platform)
β”‚ β”œβ”€β”€ πŸ”Έ Configuration Management
β”‚ β”‚ β”œβ”€β”€ πŸ€– Ansible
β”‚ β”‚ β”œβ”€β”€ 🎭 Puppet
β”‚ β”‚ β”œβ”€β”€ 🍴 Chef
β”‚ β”‚ └── πŸ§‚ SaltStack
β”‚ └── πŸ”Έ High Availability
β”‚ β”œβ”€β”€ πŸ”— Clustering (Pacemaker, Corosync)
β”‚ β”œβ”€β”€ βš–οΈ Load Balancing (HAProxy, Nginx)
β”‚ └── πŸ”„ Backup and Disaster Recovery
β”œβ”€β”€ πŸ”Ή Monitoring and Performance
β”‚ β”œβ”€β”€ πŸ”Έ System Monitoring
β”‚ β”‚ β”œβ”€β”€ πŸ”§ Tools (Nagios, Zabbix, Prometheus, Grafana)
β”‚ β”‚ └── πŸ“ Log Management (ELK Stack, Graylog)
β”‚ β”œβ”€β”€ πŸ”Έ Performance Tuning
β”‚ β”‚ β”œβ”€β”€ 🧠 CPU and Memory Optimization
β”‚ β”‚ β”œβ”€β”€ πŸ’Ύ Disk I/O Performance
β”‚ β”‚ └── 🌐 Network Performance
β”‚ └── πŸ”Έ Troubleshooting
β”‚ β”œβ”€β”€ πŸ“ Log Analysis
β”‚ β”œβ”€β”€ πŸ” Common Issues and Solutions
β”‚ β”œβ”€β”€ 🚧 Performance Bottlenecks
β”‚ └── πŸ”§ Kernel Tuning
β”œβ”€β”€ πŸ”Ή Scripting and Automation
β”‚ β”œβ”€β”€ πŸ”Έ Advanced Scripting
β”‚ β”‚ β”œβ”€β”€ πŸ“œ Shell Scripting (Advanced)
β”‚ β”‚ β”œβ”€β”€ 🐍 Python Scripting
β”‚ β”‚ └── πŸ€– Task Automation
β”‚ └── πŸ”Έ Infrastructure as Code (IaC)
β”‚ β”œβ”€β”€ 🌍 Terraform
β”‚ β”œβ”€β”€ ☁️ CloudFormation
β”‚ └── πŸ”„ CI/CD Pipelines (Jenkins, GitLab CI)
└── πŸ”Ή Security and Compliance
β”œβ”€β”€ πŸ”Έ Security Best Practices
β”‚ β”œβ”€β”€ πŸ”’ System Hardening
β”‚ β””β”€β”€πŸ”„ Regular Updates and Patching
└── πŸ” Security Auditing Tools (e.g., Lynis, OpenVAS)

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