Linux Admin Troubleshooting | Supercut скачать в хорошем качестве

Linux Admin Troubleshooting | Supercut

Master essential Linux troubleshooting skills with this comprehensive guide. Learn proven techniques for diagnosing and fixing common Linux problems, from boot issues to package management errors. This masterclass covers critical server troubleshooting scenarios including network configuration, LVM management, SELinux challenges, and Apache service errors. Perfect for Linux admins seeking practical command line troubleshooting tools and solutions for performance issues. Follow along with real RHEL examples as we demonstrate step-by-step recovery techniques for system crashes, configuration problems, and service failures. Whether you're preparing for Linux admin interview questions or need a refresher on troubleshooting commands, this guide provides the essential knowledge to solve Linux server issues efficiently. Get Started with Red Hat Enterprise Linux: https://developers.redhat.com/register Try it for yourself: https://redhat.com/interactive-labs How to rebuild the initial ramdisk image in Red Hat Enterprise Linux https://access.redhat.com/solutions/1958 RHEL Troubleshooting Challenge 5 https://red.ht/ts-5i Nate Lager:   / gangrif   Commands used: systemctl, journalctl, ss, nmap, cat, od, dos2unix, fsck, mount, grub2-install, df, chroot, dnf, dnf (yum), rpm, subscription-manager, man, ping, tracepath, traceroute, dig, ip, route, nmcli 00:00 Logical Volume Manager 00:15 Understanding LVM Abstraction Layers 00:43 Volume Groups and Logical Volumes 01:21 Key Commands for LVM 04:11 Manipulating Physical Volumes 04:35 Expanding Volume Groups 05:30 Whiteboarding LVM Concepts 09:19 Adding Disk Space to Logical Volumes 14:59 Practical Example: Extending File Systems 23:05 Troubleshooting and Advanced LVM Operations 32:23 Creating and Managing Logical Volumes 40:29 Network Troubleshooting Tools 40:34 Understanding Ping and Its Output 41:54 Exploring TracePath and TraceRoute 45:25 DNS Lookup with Dig 47:02 Local System Network Settings with IP and Route 49:10 Network Manager Command Line Interface (NMCLI) 52:48 Whiteboard Explanation of Network Flow 56:27 DNS and Network Flow 01:03:07 DNS Troubleshooting 01:14:09 Troubleshooting DNS Server Issues 01:14:32 Understanding Gateway and Routing Problems 01:17:12 Identifying and Fixing Default Gateway Issues 01:20:29 Network Interface Configuration and Multiple Gateways 01:23:09 ICMP, UDP, and TCP Protocols in Network Diagnostics 01:27:38 File System and Bootloader Tools 01:31:13 Rescue Mode and Boot Process 01:35:23 Boot Process Breakdown and Troubleshooting 01:44:33 Practical Boot Troubleshooting Scenarios 02:13:50 Setting Up the Rescue System 02:14:50 Mounting and Binding Directories 02:16:28 Creating and Editing Repo Files 02:18:05 Reinstalling Packages with DNF 02:21:38 Reboot 02:24:37 Troubleshooting Package Transactions 02:24:48 Using DNF for Package Management 02:28:41 Exploring RPM and Subscription Manager 02:34:01 Understanding Package Transactions 02:44:49 Diagnosing and Fixing Package Issues 02:50:44 Rolling Back Transactions 03:01:40 Identifying and Handling Third-Party Packages 03:07:57 Common Issues with Source Code Installation 03:09:25 Package Management Best Practices 03:12:17 Exploring Extra Repositories 03:13:07 Building and Signing Your Own RPMs 03:13:55 A Young Admin's Journey 03:16:50 Essential Troubleshooting Tools 03:17:14 Systemctl and Journalctl Commands 03:17:56 Editing Service Files with Systemctl 03:20:33 Using Journalctl for Logs 03:21:17 Network Troubleshooting with SS and Nmap 03:26:13 Diagnosing Apache Service Issues 03:34:44 SELinux and Port Binding Issues 03:41:28 Containerization and Port Management 03:49:31 Enabling Services at Boot 03:54:09 Handling Unprintable Characters in Config Files 04:04:33 Q&A