RHEL7 Boot Process Step by Step Explained - Tech Arkit

RHEL7 - RHCSA Red Hat Certified System Administrator the first certification for beginners to earn.

A. Understand and use essential tools

1. Access a shell prompt and issue commands with correct syntax

2. Use input-output redirection (>, >>, |, 2>, etc.)

3. Use grep and regular expressions to analyze text

4. Access remote systems using ssh

5. Log in and switch users in multiuser targets

6. Archive, compress, unpack, and uncompress files using tar, star, gzip, and bzip2

7. Create and edit text files

8. Create, delete, copy, and move files and directories

9. Create hard and soft links

10. List, set, and change standard ugo/rwx permissions

11. Locate, read, and use system documentation including man, info, and files in /usr/share/doc





B. Operate running systems

12. Boot, reboot, and shut down a system normally

13. Boot systems into different targets manually

14. Interrupt the boot process in order to gain access to a system

15. Identify CPU/memory intensive processes, adjust process priority with renice, and kill processes

16. Locate and interpret system log files and journals

17. Access a virtual machine's console

18. Start and stop virtual machines

19. Start, stop, and check the status of network services

20. Securely transfer files between systems



C. Configure local storage

21. List, create, delete partitions on MBR and GPT disks

22. Create and remove physical volumes, assign physical volumes to volume groups, and create and delete logical volumes

23. Configure systems to mount file systems at boot by Universally Unique ID (UUID) or label

24. Add new partitions and logical volumes, and swap to a system non-destructively



D. Create and configure file systems

25. Create, mount, unmount, and use vfat, ext4, and xfs file systems

26. Mount and unmount CIFS and NFS network file systems

27. Extend existing logical volumes

28. Create and configure set-GID directories for collaboration

29. Create and manage Access Control Lists (ACLs)

30. Diagnose and correct file permission problems



E. Deploy, configure, and maintain systems

31. Configure networking and hostname resolution statically or dynamically

32. Schedule tasks using at and cron

33. Start and stop services and configure services to start automatically at boot

34. Configure systems to boot into a specific target automatically

35. Install Red Hat Enterprise Linux systems as virtual guests

36. Configure systems to launch virtual machines at boot

37. Configure network services to start automatically at boot

38. Configure a system to use time services

40. Install and update software packages from Red Hat Network, a remote repository, or from the local file system

41. Update the kernel package appropriately to ensure a bootable system

42. Modify the system bootloader



F. Manage users and groups

43. Create, delete, and modify local user accounts

44. Change passwords and adjust password aging for local user accounts

45. Create, delete, and modify local groups and group memberships

46. Configure a system to use an existing authentication service for user and group information



G. Manage security

47. Configure firewall settings using firewall-config, firewall-cmd, or iptables

48. Configure key-based authentication for SSH

49. Set enforcing and permissive modes for SELinux

50. List and identify SELinux file and process context

51. Restore default file contexts

52. Use boolean settings to modify system SELinux settings

53. Diagnose and address routine SELinux policy violations