Enterprise Linux System Administration

1. Hardware Discovery Tools
2. Configuring New Hardware with hwinfo
3. Kernel Hardware Info – /sys/
4. /sys/ Structure
5. udev
6. Managing Linux Device Files
7. List Block Devices
8. SCSI Devices
9. USB Devices
10. USB Architecture
11. Kernel Modules
12. Configuring Kernel Components and Modules
13. Handling Module Dependencies
14. Configuring the Kernel via /proc/
15. Console
16. Virtual Terminals
17. Serial Ports
18. Random Numbers and /dev/random

LAB TASKS

1. Adjusting Kernel Options
2. Introduction to Troubleshooting Labs
3. Troubleshooting Practice: Kernel Modules

1. System Boot Method Overview
2. systemd System and Service Manager
3. systemd Targets
4. Using systemd
5. Legacy Support for SysV init
6. Booting Linux on PCs
7. GRUB 2
8. GRUB 2 Configuration
9. GRUB 2 Security
10. Boot Parameters
11. Initial RAM Filesystem
12. init
13. Linux Runlevels Aliases
14. Systemd local-fs.target and sysinit.target
15. Systemd basic.target and multi-user.target
16. Legacy local bootup script support
17. System Configuration Files
18. RHEL7 Configuration Utilities
19. SLES12 Configuration Utilities
20. Shutdown and Reboot

LAB TASKS

1. Boot Process
2. Booting directly to a bash shell
3. GRUB Command Line
4. Basic GRUB Security
5. Managing Services With Systemd’s systemctl
6. Troubleshooting Practice: Boot Process

1. Managing Software
2. RPM Features
3. RPM Architecture
4. RPM Package Files
5. Working With RPMs
6. Querying and Verifying with RPM
7. Updating the Kernel RPM
8. Dealing With RPM & Yum Digest Changes
9. Yum Plugins & RHN Subscription Manager
10. YUM Repositories
11. YUM Repository Groups
12. Compiling/Installing from Source
13. Manually Installed Shared Libraries
14. Rebuilding Source RPM Packages

LAB TASKS

1. Managing Software with RPM
2. Creating a Custom RPM Repository
3. Querying the RPM Database
4. Installing Software via RPM & Source and Rebuilding SRPMs
5. Troubleshooting Practice: Package Management

1. Partitioning Disks with fdisk & gdisk
2. Resizing a GPT Partition with gdisk
3. Partitioning Disks with parted
4. Filesystem Creation
5. Persistent Block Devices
6. Mounting Filesystems
7. Resizing Filesystems
8. Filesystem Maintenance
9. Managing an XFS Filesystem
10. Swap
11. Filesystem Structures
12. Determining Disk Usage With df and du
13. Configuring Disk Quotas
14. Setting Quotas
15. Viewing and Monitoring Quotas
16. Filesystem Attributes

LAB TASKS

1. Creating and Managing Filesystems
2. Hot Adding Swap
3. Setting User Quotas

1. Logical Volume Management
2. Implementing LVM
3. Creating Logical Volumes
4. Activating LVM VGs
5. Exporting and Importing a VG
6. Examining LVM Components
7. Changing LVM Components
8. Advanced LVM Overview
9. Advanced LVM Components
10. Advanced LVM Caching
11. Advanced LVM Striping & Mirroring
12. Advanced LVM RAID Volumes
13. gnome-disk-utility
14. SLES Graphical Disk Tool
15. RAID Concepts
16. Array Creation with mdadm
17. Software RAID Monitoring
18. Software RAID Control and Display

LAB TASKS

1. Creating and Managing LVM Volumes
2. Troubleshooting Practice: LVM
3. Creating and Managing a RAID-5 Array

1. Remote Storage Overview
2. Remote Filesystem Protocols
3. Remote Block Device Protocols
4. File Sharing via NFS
5. NFSv4+
6. NFS Clients
7. NFS Server Configuration
8. YaST NFS Server Administration
9. Implementing NFSv4
10. AutoFS
11. AutoFS Configuration
12. Accessing Windows/Samba Shares from Linux
13. SAN Multipathing
14. Multipath Configuration
15. Multipathing Best Practices
16. iSCSI Architecture
17. Open-iSCSI Initiator Implementation
18. iSCSI Initiator Discovery
19. iSCSI Initiator Node Administration
20. Mounting iSCSI Targets at Boot
21. iSCSI Multipathing Considerations

LAB TASKS

1. Using autofs
2. NFS Server Configuration
3. iSCSI Initiator Configuration
4. Multipathing with iSCSI

1. Approaches to Storing User Accounts
2. User and Group Concepts
3. User Administration
4. Modifying Accounts
5. Group Administration
6. Password Aging
7. Default User Files
8. Controlling Login Sessions
9. system-config-authentication
10. SLES DS Client Configuration
11. System Security Services Daemon (SSSD)

LAB TASKS

1. User and Group Administration
2. Using LDAP for Centralized User Accounts
3. Troubleshooting Practice: Account Management

1. PAM Overview
2. PAM Module Types
3. PAM Order of Processing
4. PAM Control Statements
5. PAM Modules
6. pam_unix
7. pam_nologin.so
8. pam_limits.so
9. pam_wheel.so
10. pam_xauth.so

LAB TASKS

1. Restricting superuser access to wheel group membership
2. Using pam_nologin to Restrict Logins
3. Setting Limits with the pam_limits Modules
4. Using pam_limits to Restrict Simultaneous Logins

1. Security Concepts
2. Tightening Default Security
3. SuSE Security Checker
4. Security Advisories
5. Fine Grained Authorizations with Polkit
6. File Access Control Lists
7. Manipulating FACLs
8. Viewing FACLs
9. Backing Up FACLs
10. File Creation Permissions with umask
11. User Private Group Scheme
12. Alternatives to UPG
13. AppArmor
14. SELinux Security Framework
15. SELinux Modes
16. SELinux Commands
17. Choosing an SELinux Policy
18. SELinux Booleans
19. Permissive Domains
20. SELinux Policy Tools
21. SUSE Basic Firewall Configuration
22. FirewallD

LAB TASKS

1. User Private Groups
2. Using Filesystem ACLs
3. Exploring AppArmor
4. Exploring SELinux Modes
5. SELinux File Contexts

1. IPv4 Fundamentals
2. TCP/UDP Fundamentals
3. Linux Network Interfaces
4. Ethernet Hardware Tools
5. Network Configuration with ip Command
6. Configuring Routing Tables
7. IP to MAC Address Mapping with ARP
8. Starting and Stopping Interfaces
9. NetworkManager
10. DNS Clients
11. DHCP Clients
12. SUSE YaST Network Configuration Tool
13. Network Diagnostics
14. Information from ss and netstat
15. Hardware and System Clock
16. Managing Network-Wide Time
17. Continual Time Sync with NTP
18. Configuring NTP Clients
19. Useful NTP Commands

LAB TASKS

1. Network Discovery
2. Basic Client Networking
3. NTP Client Configuration

1. Multiple IP Addresses
2. Configuring a DHCP server
3. IPv6
4. Interface Aggregation
5. Interface Bonding
6. Network Teaming
7. Interface Bridging
8. 802.1q VLANS
9. Tuning Kernel Network Settings

LAB TASKS

1. Multiple IP Addresses Per Network Interface
2. Configuring IPv6
3. Troubleshooting Practice: Networking

1. System Logging
2. systemd Journal
3. systemd Journal’s journactl
4. Secure Logging with Journal’s Log Sealing
5. gnome-system-log
6. Rsyslog
7. /etc/rsyslog.conf
8. Log Management
9. Log Anomaly Detector
10. Sending logs from the shell

LAB TASKS

1. Using the systemd Journal
2. Setting up a Full Debug Logfile
3. Remote Syslog Configuration
4. Remote Rsyslog TLS Configuration

1. System Status – Memory
2. System Status – I/O
3. System Status – CPU
4. Performance Trending with sar
5. Determining Service to Process Mapping
6. Realtime Monitoring of Resources — Cgroups
7. Troubleshooting Basics: The Process
8. Troubleshooting Basics: The Tools
9. strace and ltrace
10. Common Problems
11. Troubleshooting Incorrect File Permissions
12. Inability to Boot
13. Typos in Configuration Files
14. Corrupt Filesystems
15. RHEL7 Rescue Environment
16. SUSE Rescue Environment

LAB TASKS

1. Recovering Damaged MBR
2. Cgroup for Processes