RHEL family tutorials - Page 6

Use Ansible file for path state, copy to push files to managed hosts, and fetch to pull files back—with permissions, backup, validate, remote_src, and common mistakes.

Learn a safe Ansible Vault layout for group_vars and host_vars, including vault IDs, Git-safe structure, secret naming, and runtime patterns that avoid leaking credentials.

Learn Ansible register variables for task output (stdout, stderr, rc) and magic variables such as inventory_hostname, groups, hostvars, and ansible_play_hosts, with loop results and when conditions.

Learn Ansible variables—strings, numbers, booleans, lists, dictionaries, nested data, Jinja access, play vs inventory vars, vars files, and common naming mistakes.

Learn Ansible idempotency—ok vs changed, state-based modules, avoiding shell misuse, creates and removes, changed_when, handlers, repeated-run checks, and check mode.

Learn Ansible modules, FQCN names, ansible-doc options and return values, collections, ansible-galaxy install, requirements.yml, collections_path, and module-not-found fixes.

Learn where Ansible group_vars and host_vars belong, how variables merge per host, how inventory patterns and --limit target hosts, and how to verify variables with ansible-inventory.

Configure ansible-navigator.yml at the project root—search order, precedence, stdout vs interactive mode, execution environments, artifacts, logging, and verification with settings and ansible-config on Rocky Linux 10.

Learn how to organize an Ansible project with ansible.cfg, inventory, playbooks, roles, inventory/group_vars, inventory/host_vars, requirements.yml, vault files, and Git-friendly best practices.

Build a two-node EX294 Ansible practice lab on Rocky Linux 10: hostnames, /etc/hosts, ansible user, SSH keys, passwordless sudo, and connectivity checks before installing ansible-core.

Learn Ansible error handling with block, rescue, always, failed_when, changed_when, register checks, ignore_errors trade-offs, unreachable hosts, and meta: clear_host_errors.

Learn Ansible tags to run or skip selected playbook tasks at runtime with --tags, --skip-tags, always, never, play and role tags, and safe partial runs.

Learn Ansible loops with loop, loop_control, register results, when per item, until retries and delay, and when to use wait_for instead of looping.

Learn Ansible handlers with notify, service restarts, execution order, listen, flush_handlers, loops, roles, changed_when pitfalls, and common troubleshooting mistakes.

Learn how Ansible inventory files list hosts and groups in INI or YAML, where to place variables, how parent and child groups work, and how to verify with ansible-inventory and ping on Rocky Linux 10.

Configure ansible.cfg at the project root—search order, defaults, inventory path, remote_user, become, roles_path, and verification with ansible --version and ansible-config on Rocky Linux 10.

Install Ansible on Rocky Linux 10 using ansible-core, EPEL collection RPMs, pipx, or pip. Add ansible-navigator, Podman, verify versions, and run your first ping test.

Learn Ansible Vault to encrypt files and variables with create, view, edit, encrypt, decrypt, rekey, vault IDs, password options, and secure group_vars and host_vars usage.

RHCE EX294 objectives explained as a practical Ansible study plan, with RHCSA task mapping, ansible-navigator focus, Rocky Linux lab guidance, and GoLinuxCloud course links.

Compare Ansible import_tasks and include_tasks for static vs dynamic task loading, with conditions, loops, tags, apply, list-tasks behavior, and when to use each.

Learn Ansible when conditionals with variables, facts, registered output, lists, dictionaries, loops, block and role level conditions, and common mistakes.

Learn Ansible variable precedence with a practical order for group_vars, host_vars, play vars, vars_files, role defaults, role vars, and extra vars, plus debugging with ansible-inventory and debug tasks.

Write your first Ansible playbook step by step—project layout, package and service tasks, file and copy modules, become, simple vars, syntax check, check mode, and PLAY RECAP.

Run Ansible playbooks with ansible-playbook and ansible-navigator—inventory, --limit, --syntax-check, --check, --diff, verbosity, tags, become, extra vars, and stdout mode.

Learn Ansible playbook structure—plays, tasks, modules, hosts, become, vars, handlers, multiple plays, execution order, validation, and common layout mistakes.

Compare Ansible command, shell, and raw modules—pipes, argv, creates, removes, changed_when, Python bootstrap, security risks, and when to use dedicated modules instead.

Learn what Ansible is, how agentless automation works, and how control nodes, inventory, modules, playbooks, roles, collections, and vault fit together on Rocky Linux.

Learn Ansible comparison and logical operators, Jinja2 tests such as is defined, and safe when expressions for strings, lists, dictionaries, facts, and registered task results.

Learn YAML syntax for Ansible playbooks—indentation, lists, dictionaries, strings, booleans, multiline values, common mistakes, and ansible-playbook --syntax-check validation.

Learn Ansible facts from the setup module—OS, network, memory, mounts, and Python—plus fact filters, gather_facts control, custom facts.d files, and ansible_local in playbooks and templates.