Linux Fundamentals Notes

Here are some more notes as you prepare for the latest version of the Linux+ exam.

Controlling Hardware in Linux 

  • Linux actually refers to the kernel (core OS component)
  • The BIOS/UEFI starts the boot loader which starts the operating system kernel of Linux
  • The kernel coordinates actions between the hardware and the software
  • It runs in ring zero or often called kernel space
  • The user space tends to refer to everything out of the kernel space
  • The Linux kernel is tasked with driving the hardware in use
  • It exports data about the detected hardware using the /sys and /proc virtual file systems
  • Applications often access devices using the files created in /dev; specific files represent specific devices, for example: 
    • Disk drive – /dev/sda
    • Partition – /dev/sda1
    • Mice – /dev/input/mouse0
    • Keyboards – /dev/input/event0
    • Sound card – /dev/snd/*
    • Serial ports – /dev/ttyS*
  • You can tell which type of file you have (block versus character) when you list the files – note the use of the b or c character in the ls output

AWS Certified Cloud Practitioner Technology List

Hello everyone! Yes – all my certs are needing to be refreshed at once it would appear.

Today I am renewing the entry-level Amazon Web Services (AWS) certification entitled The AWS Certified Cloud Practitioner certification.

Taking a look at the impressive exam objectives, I wanted to provide a checklist of the technologies we should definitely understand and be ready to answer multiple choice questions about.

I tried to break these up into categories as best I could. I hope this is a help to you in your studies.

Since I am taking this exam later today – I will be sure to post a full review of the exam after I pass (ohhhhh – such confidence!)

AWS Certified Cloud Practitioner Technologies List 

DATA

Relational Database Service (RDS)

DynamoDB

AWS Snowball

AWS Redshift

Amazon QuickSight


COMPUTE

Elastic Container Service (ECS)

Elastic Kubernetes Service (EKS)

Lambda

Elastic Compute Cloud (EC2)

EC2 Image Builder

Auto Scaling


MONITORING

CloudWatch

CloudTrail

AWS Config


SECURITY

AWS IAM

AWS Web Application Firewall (WAF)

Security Groups (SG)

Network Access Control List (NACL)

AWS Security Center

AWS Global Accelerator

AWS Shield

AWS Macie

AWS GuardDuty


STORAGE

Elastic Block Store (EBS)

Elastic File System (EFS)

S3 Glaciar

AWS Simple Storage Service (S3)


NETWORKING

AWS Storage Gateway

Virtual Private Cloud (VPC)

AWS Route 53

Load Balancing

AWS Direct Connect

AWS Global Infrastructure

CloudFront


COST MANAGEMENT

AWS Pricing API

AWS Simple Monthly Calculator

AWS Cost Explorer


SUPPORT

AWS Trusted Advisor

AWS Management Console

AWS Marketplace

Amazon Partner Network

AWS Knowledge Center

Partner Systems Integrators

AWS Organizations

Concierge for AWS Enterprise

AWS Abuse

Technical Account Managers (TAMs)