The GL275 is an expansive course that covers a wide range of network services useful to every organisation.

Special attention is paid to the concepts needed to implement these services securely, and to the trouble-shooting skills which will be necessary for real-world administration of these network services.

Like all Guru Labs courses, the course material is designed to provide extensive hands-on experience.

Module 1: Securing services

Module 2: SELinux and LSM

Module 3:DNS concepts

Module 4: Configuring Bind

Module 5: Creating DNS hierarchies

Module 6: Advanced bind DNS features

Module 7: Using apache

Module 8: Apache security

Module 9: Apache server-side scripting administration

Module 10: Implementing an FTP server

Module 11: The squid proxy server

Module 12: SQL fundamentals and MariaDB

Module 13: LDAP concepts and clients

Module 14: OpenLDAP servers

Module 15: Samba concepts and configuration

Module 16: SMTP theory

Module 17: Postfix

Module 18: Mail services and retrieval

Module 19: NIX

Students should already be comfortable with basic Linux or Unix administration. Fundamentals such as the Linux filesystem, process management, and how to edit files will not be covered in class.

A good understanding of network concepts, the TCP/IP protocol suite is also assumed. These skills are taught in the GL120 “Linux Fundamentals” and GL250 “Enterprise Linux Systems Administration” courses.

Hardening of a RHEL Linux System.

This course covers a wide range of security concepts and practices for Red Hat Enterprise Linux 7 (RHEL7). It starts with an introduction to basic security principles, including minimisation, service discovery, and hardening techniques. The course then delves into scanning, probing, and mapping vulnerabilities, covering tools like WHOIS, DNS interrogation, Nessus/OpenVAS, and intrusion detection systems like Snort.

The course also covers tracking security updates and software maintenance, including managing RPM packages, Yum repositories, and the Red Hat Network Subscription Manager. It explores filesystem management, partitioning, encryption, and securing the filesystem with disk quotas, file attributes, and mount options. Additionally, the course covers special permissions, file access control lists (ACLs), and monitoring for filesystem changes using host-based intrusion detection systems (HIDS) like AIDE.

User account management, password security, and the Pluggable Authentication Modules (PAM) framework are also covered. The course introduces FreeIPA for centralised authentication and discusses log file administration, including systemd Journal, rsyslog, and log management tools. Kernel-level auditing with auditd is explored, along with securing services like Xinetd, TCP Wrappers, and firewalls (FirewallD and iptables).

Finally, the course delves into SELinux, covering its goals, modes, policies, troubleshooting, and the differences between Discretionary Access Control (DAC) and Mandatory Access Control (MAC) security models.

Module 1: Security concepts

Module 2: Scanning, probing, and mapping vulnerabilities

Module 3: Tracking security updates and software maintenance

Module 4: Manage the filesystem

Module 5: Securing the filesystem

Module 6: Manage special permissions

Module 7: Manage file access controls

Module 8: Monitor for filesystem changes

Module 9: Manage user accounts

Module 10: Password security and PAM

Module 11: Using free IPA for centralised authentication

Module 12: Log file administration

Module 13: Accountability with kernel audit

Module 14: Securing services

Module 15: SELinux

This 5 day course is an in-depth course that explores installation, configuration and maintenance of Linux systems.

The course focuses on issues universal to every workstation and server. Like all Guru Labs courses, the course material is designed to provide extensive hands-on experience.

Topics include: installation and configuration; the boot process; user and group administration; filesystem administration, including quotas, FACLs, RAID and LVM; task automation; client networking; SELinux; software management; log files; troubleshooting; and more.

Module 1: Linux kernel & devices

Module 2: System overview

Module 3: Grub2/system boot process

Module 4: Software maintenance

Module 5: Local storage administration

Module 6: LVM & RAID

Module 7: Remote storage administration

Module 8: User/group administration

Module 9: Pluggable authentication modules (pam)

Module 10: Security administration

Module 11: Basic networking

Module 12: Advanced networking

Module 13: Log file administration

Module 14: Monitoring & troubleshooting

Module 15: Pre-installation considerations

Module 16: A – installing rhel7

Module 17: B – installing sles12

Module 18: Manage virtual machines

Module 19: Backups

Students should already be comfortable working in a Linux or Unix environment. Fundamentals such as the Linux filesystem, process management, and how to edit files will not be covered in class.

An understanding of network concepts, and the TCP/IP protocol suite is helpful. These skills are taught in the GL120 “Linux Fundamentals” course.

This 5 day course is a challenging course that focuses on the fundamental tools and concepts of Linux and Unix.

Students gain proficiency using the command line. Beginners develop a solid foundation in Unix, while advanced users discover patterns and fill in gaps in their knowledge. Like all Guru Labs courses, the course material is designed to provide extensive hands-on experience.

Topics include: basic file manipulation; basic and advanced filesystem features; I/O redirection and pipes; text manipulation and regular expressions; managing jobs and processes; vi, the standard Unix editor; automating tasks with shell scripts; managing software; secure remote administration; and more.

Module 1: What is Linux?

Module 2: Login and exploration

Module 3: The Linux filesystem

Module 4: Manipulating files

Module 5: Shell basics

Module 6: Archiving and compression

Module 7: Text processing

Module 8: Regular expressions

Module 9: Text editing

Module 10: Messaging

Module 11: Command shells

Module 12: Introduction to shell scripting

Module 13: Process management and job control

Module 14: At and cron

Module 15: Managing software

Module 16: The secure shell (ssh)

Module 17: Mounting filesystems & managing removable media

Module 18: Printing

Module 19: The x window system

Module 20: Emacs

Students should be comfortable with computers. No familiarity with Linux or other Unix operating systems is required.

The GL375 is designed to provide the skills necessary to automate tasks on a Unix or Linux system. Systems Administrators and Developers alike can avoid errors, save time and money by replacing repetitive work patterns with shell scripts.

Care has been taken to present the GL375 in a format that benefits all students, with or without previous programming experience. Guru Labs believes that the best way to learn shell scripting is writing shell scripts.

For this reason, lab time is emphasised. Early labs present the scripting process step by step, while later labs are presented in a challenge format.

While official solutions to each lab task are provided, students are encouraged to create their own before examining the solution. In this way, more experienced students are challenged without overwhelming the less experienced.

Solid understanding of Unix-based systems and proficiency on the Unix or Linux command line.