Linux System Administration of IT Infrastructure

Module 01- Understand and use essential tools

• Access a shell prompt and issue commands with correct syntax
• Use input-output redirection (>, >>, |, 2>, etc.)
• Use grep and regular expressions to analyze text
• Access remote systems using SSH
• Log in and switch users in multi-user targets
• Archive, compress, unpack, and uncompress files using tar, gzip, and bzip2
• Create and edit text files
• Create, delete, copy, and move files and directories
• Create hard and soft links
• List, set, and change standard ugo/rwx permissions
• Locate, read, and use system documentation including man, info, and files in /usr/share/doc

Module 02: Manage software

• Configure access to RPM repositories
• Install and remove RPM software packages
• Configure access to Flatpak repositories
• Install and remove Flatpak software packages

Module 03: Create simple shell scripts

• Conditionally execute code (use of: if, test, [], etc.)
• Use Looping constructs (for, etc.) to process file, command line input
• Process script inputs ($1, $2, etc.)
• Processing output of shell commands within a script

Module 04: Operate running systems

• Boot, reboot, and shut down a system normally
• Boot systems into different targets manually
• Interrupt the boot process in order to gain access to a system
• Identify CPU/memory intensive processes and kill processes
• Adjust  process scheduling
• Manage tuning profiles
• Locate and interpret system log files and journals
• Preserve system journals
• Start, stop, and check the status of network services
• Securely transfer files between systems

Module 05: Create and configure file systems

• Create, mount, unmount, and use VFAT, ext4, and XFS file systems
• Mount and unmount network file systems using NFS
• Configure autofs
• Extend existing logical volumes
• Diagnose and correct file permission problems

Module 06: Deploy, configure, and maintain systems

• Schedule tasks using at, cron and systemd timer units
• Start and stop services and configure services to start automatically at boot
• Configure systems to boot into a specific target automatically
• Configure time service clients
• Install and update software packages from Red Hat Content Delivery Network, a remote repository, or from the local file system
• Modify the system bootloader

Module 07: Manage basic networking

• Configure IPv4 and IPv6 addresses
• Configure hostname resolution
• Configure network services to start automatically at boot
• Restrict network access using firewalld and firewall-cmd

Module 08: Manage users and groups

• Create, delete, and modify local user accounts
• Change passwords and adjust password aging for local user accounts
• Create, delete, and modify local groups and group memberships
• Configure privileged access

Module 09: Manage security

• Configure firewall settings using firewall-cmd/firewalld
• Manage default file permissions
• Configure key-based authentication for SSH
• Set enforcing and permissive modes for SELinux
• List and identify SELinux file and process context
• Restore default file contexts
• Manage SELinux port labels
• Use Boolean settings to modify system SELinux settings