RHCSA Study Guide
Understand and use Essential Tools
- Access a shell prompt and issue commands with correct syntax
- Use input-output redirection
- 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 uncompressfiles using
tar,gzip, andbzip2 - 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 Documantation Including
man,info, and files in/usr/share/doc/
Manage Software
- Configure Access to RPM Repositories
- Install and Remove RPM Software Packages
- Configure Access to Flatpak Repositories
- Install and Remove Flatpak Software Packages
Create simple shell scripts
- Conditionally execute code
- Use looping constructs to process file, command line input
- Process scripts inputs
- Processing output of shell commands within a script
Operate running systems
- Boot, reboot, and shut down a system normally
- Boot systems into different target manually
- Interrupt the boot process in order to gain access to a system
- Identify CPU/memory intensive processes and kill processes
- Adjust process scheduling
- Locate and interupt system logs files and journals
- Preserve system journals
- Start, stop, and check the status of network services
- Securly transfer files between systems
Configure local storage
- List, create, and delete partitions on GPT disks
- Create and remove physical volumes
- Assign physical volumes to volume groups
- Create and delete logical volumes
- Configure systems to mount file systems at boot by universally unique ID (UUID) or label
- Add new partitions and logical volumes, and swap to a system non-destructively
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
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
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
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
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