Enterprise Linux Systems Administration (LN4987)

Module 1: Linux kernel & devices

• Hardware Discovery Tools
• Configuring New Hardware with hwinfo
• Kernel Hardware Info “ /sys/
• /sys/ Structure
• udev
• Managing Linux Device Files
• List Block Devices
• SCSI Devices
• USB Devices
• USB Architecture
• Kernel Modules
• Configuring Kernel Components and Modules
• Handling Module Dependencies
• Configuring the Kernel via /proc/
• Console
• Virtual Terminals
• Keyboard & locale configuration
• Serial Ports
• Random Numbers and /dev/random

Module 2: SYSTEMD overview

• System Boot Method Overview
• systemd System and Service Manager
• Modifying systemd services
• Systemd Service Sandboxing Features
• systemd Targets
• Using systemd
• Linux Runlevels Aliases
• Legacy Support for SysV init

Module 3: GRUB2/SYSTEMD boot process

• Booting Linux on PCs
• GRUB 2
• GRUB 2 Configuration
• The Boot Loader Specification
• GRUB 2 Security
• Boot Parameters
• Initial RAM Filesystem
• init
• Systemd local-fs.target and sysinit.target
• Systemd basic.target and multi-user.target
• Legacy local bootup script support
• System Configuration Files
• RHEL8 Configuration Utilities
• SLES12 Configuration Utilities
• Shutdown and Reboot

Module 5: FileSystem Administraton

• Partitioning Disks with fdisk
• Partitioning Disks with parted
• Filesystem Creation
• Mounting Filesystems
• Filesystem Maintenance
• Persistent Block Devices
• Resizing Filesystems
• Swap
• Filesystem Structures
• Determining Disk Usage With df and du
• Configuring Disk Quotas
• Setting Quotas
• Viewing and Monitoring Quotas
• Filesystem Attributes
• Backup Software

Module 6: LVM & RAID

• Logical Volume Management
• Implementing LVM
• Creating Logical Volumes
• Manipulating VGs & LVs
• Advanced LVM Concepts
• system-config-lvm
• SLES Graphical Disk Tool
• RAID Concepts
• Array Creation with mdadm
• Software RAID Monitoring
• Software RAID Control and Display

Module 7: Remote Storage Administration

• Remote Storage Overview
• Remote Filesystem Protocols
• Remote Block Device Protocols
• File Sharing via NFS
• NFSv4
• NFS Clients
• NFS Server Configuration
• Implementing NFSv4
• AutoFS
• AutoFS Configuration
• Accessing Windows/Samba Shares from Linux
• SAN Multipathing
• Multipath Configuration
• Multipathing Best Practices
• iSCSI Architecture
• Open-iSCSI Initiator Implementation
• iSCSI Initiator Discovery
• iSCSI Initiator Node Administration
• Mounting iSCSI Targets at Boot
• iSCSI Multipathing Considerations

Module 8: User/Group Administration

• User and Group Concepts
• User Administration
• Modifying Accounts
• Group Administration
• Password Aging
• Default User Files
• Controlling Logins
• Manual DS Client Configuration
• system-config-authentication
• SLES Graphical DS Client Configuration
• System Security Services Daemon (SSSD)

Module 9: Pluggable Authentication Modules (PAM)

• PAM Overview
• PAM Module Types
• PAM Order of Processing
• PAM Control Statements
• PAM Modules
• pam_unix
• pam_nologin.so
• pam_limits.so
• pam_wheel.so
• pam_xauth.so

Module 10: Security Administration

• Security Concepts
• Tightening Default Security
• SuSE Security Checker
• Security Advisories
• File Access Control Lists
• Manipulating FACLs
• Viewing FACLs
• Backing Up FACLs
• File Creation Permissions with umask
• User Private Group Scheme
• Alternatives to UPG
• AppArmor
• SELinux Security Framework
• SELinux Modes
• SELinux Commands
• Choosing an SELinux Policy
• SELinux Booleans
• Permissive Domains
• SELinux Policy Tools
• Basic Firewall Activation

Module 11: Basic Networking

• IPv4 Fundamentals
• TCP/UDP Fundamentals
• Linux Network Interfaces
• Ethernet Hardware Tools
• Network Configuration with ip Command
• Configuring Routing Tables
• IP to MAC Address Mapping with ARP
• Starting and Stopping Interfaces
• NetworkManager
• DNS Clients
• DHCP Clients
• system-config-network{tui,cmd}
• SUSE YaST Network Configuration Tool
• Network Diagnostics
• Information from netstat and ss
• Managing Network-Wide Time
• Continual Time Sync with NTP
• Configuring NTP Clients
• Useful NTP Commands

Module 12: Advanced Networking

• Multiple IP Addresses
• Configuring a DHCP server
• Enabling IPv6
• Interface Bonding
• Interface Bridging
• 802.1q VLANS
• Tuning Kernel Network Settings

Module 13: Log File Administration

• System Logging
• Syslog-ng
• Rsyslog
• /etc/rsyslog.conf
• Log Management
• Log Anomaly Detector

Module 14: Monitoring & Troubleshooting

• System Status - Memory
• System Status - I/O
• System Status - CPU
• Performance Trending with sar
• Troubleshooting Basics: The Process
• Troubleshooting Basics: The Tools
• strace and ltrace
• Common Problems
• Troubleshooting Incorrect File Permissions
• Inability to Boot
• Typos in Configuration Files
• Corrupt Filesystems
• RHEL6 Rescue Environment
• SUSE Rescue Environment