{"id":33,"date":"2025-11-30T14:55:42","date_gmt":"2025-11-30T14:55:42","guid":{"rendered":"https:\/\/adler-tech.com\/?page_id=33"},"modified":"2026-04-13T14:48:14","modified_gmt":"2026-04-13T13:48:14","slug":"ubuntu-system-administration","status":"publish","type":"page","link":"https:\/\/adler-tech.com\/?page_id=33","title":{"rendered":"Ubuntu System Administration"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">Day 1: Core System Operations &amp; Network Architecture<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Module 1: The Ubuntu Ecosystem<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Distro Architecture &amp; Genealogy<\/strong> (Differences between Debian upstream, RHEL, and Ubuntu LTS cycles).<\/li>\n\n\n\n<li><strong>Platform Value Proposition<\/strong> (Key advantages, enterprise support model, Snap vs. Apt).<\/li>\n\n\n\n<li><strong>Editions and Flavors<\/strong> (Server, Desktop, Core, and cloud-specific kernels).<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Module 2: Installation and Initial Access<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Pre-flight Checks<\/strong> (Hardware sizing, storage requirements, compatibility).<\/li>\n\n\n\n<li><strong>Deployment Strategies<\/strong> (Manual installer, automated installations via Autoinstall\/Preseed, advanced partitioning).<\/li>\n\n\n\n<li><strong>Command Line Proficiency<\/strong> (Essential Bash operations, piping, and stream redirection).<\/li>\n\n\n\n<li><strong>Cloud Operations<\/strong> (Deploying and initializing Ubuntu Cloud Images on public\/private clouds).<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Module 3: Network Configuration Stack<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Connectivity Fundamentals<\/strong> (TCP\/IP addressing, subnetting refresher).<\/li>\n\n\n\n<li><strong>Interface Management<\/strong> (Predictable Network Interface Names, identifying physical ports).<\/li>\n\n\n\n<li><strong>Addressing and Routing<\/strong> (Static IP assignment, Gateway configuration, Netplan vs. ifupdown).<\/li>\n\n\n\n<li><strong>Name Resolution<\/strong> (Configuring <code>\/etc\/hosts<\/code> and systemd-resolved).<\/li>\n\n\n\n<li><strong>Advanced Networking<\/strong> (Bridging interfaces for virtualization, bonding\/teaming concepts).<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Day 2: Security, Virtualization &amp; Containerization<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Module 4: Hardening and Access Control<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Privilege Management<\/strong> (Sudoers configuration, user groups, file permissions).<\/li>\n\n\n\n<li><strong>Mandatory Access Control<\/strong> (Enforcing security profiles with AppArmor).<\/li>\n\n\n\n<li><strong>Network Defense<\/strong> (Firewall strategies using UFW wrapper and low-level iptables\/nftables).<\/li>\n\n\n\n<li><strong>Public Key Infrastructure<\/strong> (Generating Self-Signed certificates, managing CA trust stores).<\/li>\n\n\n\n<li><strong>Centralized Authentication<\/strong> (Integration with directory services: LDAP and Samba AD integration).<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Module 5: Virtualization Infrastructure<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>The KVM Hypervisor<\/strong> (Enabling hardware virtualization, interacting with libvirt\/virsh).<\/li>\n\n\n\n<li><strong>Orchestration Overview<\/strong> (Managing the virtualization stack via OpenStack components).<\/li>\n\n\n\n<li><strong>Rapid VM Deployment<\/strong> (Using <code>multipass<\/code> for developer instances, <code>uvt<\/code> tools, and <code>virt-install<\/code>).<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Module 6: System Containers (LXD)<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>LXD\/LXC Architecture<\/strong> (Differences between application containers like Docker and system containers).<\/li>\n\n\n\n<li><strong>Lifecycle Management<\/strong> (Creating, launching, stopping, and destroying containers).<\/li>\n\n\n\n<li><strong>Resource Control<\/strong> (Applying hardware profiles, disk limits, and network policies).<\/li>\n\n\n\n<li><strong>Image Operations<\/strong> (Publishing snapshots, importing\/exporting images across hosts).<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Day 3: Service Deployment, Reliability &amp; Maintenance<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Module 7: High Availability &amp; Operations<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Reliability Engineering<\/strong> (Concepts of HA Clustering, failover strategies).<\/li>\n\n\n\n<li><strong>Observability<\/strong> (Monitoring system load, resource usage, and service status).<\/li>\n\n\n\n<li><strong>Disaster Recovery<\/strong> (Backup methodologies, restoring system state and data).<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Module 8: Communication Services<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Email Storage &amp; Retrieval<\/strong> (Configuring Dovecot for IMAP\/POP3 protocols).<\/li>\n\n\n\n<li><strong>Mail Transfer Agents<\/strong> (SMTP configuration with Postfix and Exim4, relay setup).<\/li>\n\n\n\n<li><strong>Web Infrastructure<\/strong> (Deploying Apache HTTPD, virtual hosts configuration).<\/li>\n\n\n\n<li><strong>Traffic Optimization<\/strong> (Setting up Squid as a caching proxy or forward proxy).<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Module 9: The Application Stack<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Database Administration<\/strong> (Installation and initialization of MySQL\/MariaDB).<\/li>\n\n\n\n<li><strong>Scripting &amp; Runtimes<\/strong> (Environment setup for PHP, Perl, and Python scripting).<\/li>\n\n\n\n<li><strong>Application Frameworks<\/strong> (Deploying the Ruby on Rails stack).<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Day 1: Core System Operations &amp; Network Architecture Module 1: The Ubuntu Ecosystem Module 2: Installation and Initial Access Module 3: Network Configuration Stack Day 2: Security, Virtualization &amp; Containerization Module 4: Hardening and Access Control Module 5: Virtualization Infrastructure Module 6: System Containers (LXD) Day 3: Service Deployment, Reliability &amp; Maintenance Module 7: High [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":11,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-33","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Ubuntu System Administration - ADLER-TECH<\/title>\n<meta name=\"description\" content=\"Deep dive into Ubuntu ecosystem. 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