User talk:Ebarrier

From ICO wiki

Contents

Operating systems basic terms and introduction

Tasks of the kernel, operating system, RAM, processor etc

Applications use the kernel to connect to computer system resources (CPU; memory and devices). It manages input/output requests from software, translating them into data processing instructions for the central processing unit. It is also responsible for managing memory, and for managing and communicating with computing peripherals, like printers, speakers, etc. It is crucial part of the operating system.

Tasks:

  • CPU time planning
    • Real time vs Package processing
    • Syncing
    • Multitasking with multiple CPUs
  • Memory management
    • MMU - memory management unit
    • Cache and swap
  • I/O management
    • Syncronous
    • Asyncronous
  • File management
    • Permissions
    • File system hierarchy


An operating system (OS) is system software that manages computer hardware and software resources and provides common services for computer programs (API). Tasks:

  • Hardware management
    • CPU time
    • Memory management
    • Input/output management
    • Network management
  • Computer system management
    • Application management
    • Input/output device management
    • User authentication and authorization
    • Data management between devices

User management

What is authorization and authentication?

What is password salt and what is it used for?

Working with files and permissions

Explain the way why permissions are needed and how they are set for users

Explain special permissions

User environment

What are user environment variables used for? Name two reasons

Processes

How to stream data between processes

What are different type of processes (running, stopped, killed, zombie etc)

Different examples of how to benefit from sending signals between processes

Software management

Name various ways how to manage software in LInux

What are the pros and cons of Linux software management

What are software repositories?

What are libraries?

Filesystem hierarchy

Explain the hierarchy according to FHS

Name specific folder meanings and usage

Documentation

Best practices of a good documentation

Why should we document?

Security

List the different type of security breaches

What should the user/admin do to prevent the attack?

Partitioning and swap area

What are the primary, extended and logical partitions? What limitations are set with these partitions types?

When isn’t it a good idea to use swap area?

RAID and LVM technologies

Name main uses and features of both technologies

SAN, NAS and CAS technologies

Name main uses and features of all the technologies

Backup and recovery

Backup and recovery plans

Monitoring and log files

Active and passive monitoring

Types of alerts

Benefits of monitoring

Centralized logs

Ethical, social and personal aspects of working in IT field

Impostor syndrome, teamwork, burnout