Red Hat Enterprise Linux 9 (RHEL9)-124/CompTIA Linux+.
This is the first Course in a sequel of two courses, covering the exam blueprint for the Red Hat Certified System Administrator & the CompTIA Linux+ Certification Exams.
How to work with VIM Operation Modes: Command Mode; Edit Mode; Visual Mode (line and block); and Extended Command Mode.
Configuring Permissions-- Comprehensive Lab--4 nuggets meal 😃
Managing Storage Devices: Creating a GPT partition table :: Creating a partition :: Formatting a partition with a Linux file system :: Creating a mount point :: Permanently mounting a partition using fstab
Managing Logical Volumes: Creating a physical volume :: Creating a volume group :: Creating a logical volume :: Formatting a logical volume with a file system :: Permanently mounting a logical volume in the /etc/fstab file.
Part 5: Password-Protecting the Boot GRUB Menu: If we are wondering why this is important, please follow this link to see how easy it is to change the password for the root account if an unauthorized user were to gain access to the GRUB menu.
Scripting, Configuration Management, and Orchestration
Control Jobs: start, foreground, background, stop, resume, kill, and list jobs.
Per the demo, to kill all control jobs use the command pkill control and that will terminate all three control jobs.
Kill Preprocesses: kill -l :: killall :: pgrep :: pkill :: pstree ::
Customizing Open SSH Service Configuration: Remember to ro reload the config file using the command systemctl reload sshd
Correction:
Notice in my demo there was an error message displayed when the devsecops2 account tried to ssh to the ansible2 server using key3. That error was fixed by re-transporting the key3 (ed25519) to the ansible2 remote server using the command ssh-copy-id -i key3 devsecops2@ansible2. Notice in the lines below the desecop2 user gaining ssh access directly using key authentication without being prompted for a password:
devsecops2@control .ssh]$ ssh -i key3 devsecops2@ansible2
This is the system ansible2.example.local.
Last login: Sun Oct 29 07:23:11 2023 from 192.168.1.227
[devsecops2@ansible2 ~]$
Red Hat Subscription Management :: subscription-manager register --username :: subscription-manager attach --auto :: dnf repolist --enabled :: subscription-manager list --available
