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<!doctype html>
<html lang="en" class="no-js">
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<title>School Of SRE</title>
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School Of SRE
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Level 101
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Linux Basics
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Introduction
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Command Line Basics
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Server Administration
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Conclusion
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Git
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Git Basics
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Working With Branches
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Github and Hooks
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Conclusion
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Linux Networking
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Linux Networking
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<a href="level101/linux_networking/intro/" class="md-nav__link">
Introduction
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DNS
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<a href="level101/linux_networking/udp/" class="md-nav__link">
UDP
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HTTP
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TCP
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Routing
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Conclusion
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Python and Web
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Introduction
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<a href="level101/python_web/python-concepts/" class="md-nav__link">
Some Python Concepts
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Python, Web and Flask
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The URL Shortening App
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Conclusion
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Data
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Data
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Relational Databases
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Relational Databases
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Introduction
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Key Concepts
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MySQL
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InnoDB
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Backup and Recovery
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MySQL Replication
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Operational Concepts
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Operational Concepts
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Select Query
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Query Performance
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Lab
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Conclusion
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NoSQL
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NoSQL
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Introduction
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Key Concepts
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Conclusion
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Big Data
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Big Data
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Introduction
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Evolution and Architecture of Hadoop
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Conclusion
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Systems Design
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Systems Design
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<a href="level101/systems_design/intro/" class="md-nav__link">
Introduction
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Scalability
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Availability
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Fault Tolerance
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Conclusion
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Metrics and Monitoring
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Metrics and Monitoring
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<a href="level101/metrics_and_monitoring/introduction/" class="md-nav__link">
Introduction
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<a href="level101/metrics_and_monitoring/command-line_tools/" class="md-nav__link">
Command-line Tools
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Third-party Monitoring
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<a href="level101/metrics_and_monitoring/alerts/" class="md-nav__link">
Proactive Monitoring with Alerts
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<a href="level101/metrics_and_monitoring/best_practices/" class="md-nav__link">
Best Practices for Monitoring
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Observability
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Conclusion
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Security
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Security
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Introduction
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Fundamentals of Security
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Network Security
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Threat, Attacks & Defences
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<a href="level101/security/writing_secure_code/" class="md-nav__link">
Writing Secure code
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Conclusion
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Level 102
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<h1 id="school-of-sre">School of SRE</h1>
<p><img src="img/sos.png" width=200 ></p>
<p>Site Reliability Engineers (SREs) sits at the intersection of software engineering and systems engineering. While there are potentially infinite permutations and combinations of how infrastructure and software components can be put together to achieve an objective, focusing on foundational skills allows SREs to work with complex systems and software, regardless of whether these systems are proprietary, 3rd party, open systems, run on cloud/on-prem infrastructure, etc. Particularly important is to gain a deep understanding of how these areas of systems and infrastructure relate to each other and interact with each other. The combination of software and systems engineering skills is rare and is generally built over time with exposure to a wide variety of infrastructure, systems, and software. </p>
<p>SREs bring in engineering practices to keep the site up. Each distributed system is an agglomeration of many components. SREs validate business requirements, convert them to SLAs for each of the components that constitute the distributed system, monitor and measure adherence to SLAs, re-architect or scale out to mitigate or avoid SLA breaches, add these learnings as feedback to new systems or projects and thereby reduce operational toil. Hence SREs play a vital role right from the day 0 design of the system. </p>
<p>In early 2019, we started visiting campuses across India to recruit the best and brightest minds to make sure LinkedIn, and all the services that make up its complex technology stack are always available for everyone. This critical function at LinkedIn falls under the purview of the Site Engineering team and Site Reliability Engineers (SREs) who are Software Engineers, specialized in reliability. </p>
<p>As we continued on this journey we started getting a lot of questions from these campuses on what exactly the site reliability engineering role entails? And, how could someone learn the skills and the disciplines involved to become a successful site reliability engineer? Fast forward a few months, and a few of these campus students had joined LinkedIn either as interns or as full-time engineers to become a part of the Site Engineering team; we also had a few lateral hires who joined our organization who were not from a traditional SRE background. That's when a few of us got together and started to think about how we can onboard new graduate engineers to the Site Engineering team.</p>
<p>There are very few resources out there guiding someone on the basic skill sets one has to acquire as a beginner SRE. Because of the lack of these resources, we felt that individuals have a tough time getting into open positions in the industry. We created the School Of SRE as a starting point for anyone wanting to build their career as an SRE.
In this course, we are focusing on building strong foundational skills. The course is structured in a way to provide more real life examples and how learning each of these topics can play an important role in day to day job responsibilities of an SRE. Currently we are covering the following topics under the School Of SRE:</p>
<ul>
<li>
<p>Level 101</p>
<ul>
<li>Fundamentals Series<ul>
<li><a href="https://linkedin.github.io/school-of-sre/level101/linux_basics/intro/">Linux Basics</a></li>
<li><a href="https://linkedin.github.io/school-of-sre/level101/git/git-basics/">Git</a></li>
<li><a href="https://linkedin.github.io/school-of-sre/level101/linux_networking/intro/">Linux Networking</a></li>
</ul>
</li>
<li><a href="https://linkedin.github.io/school-of-sre/level101/python_web/intro/">Python and Web</a></li>
<li>Data<ul>
<li><a href="https://linkedin.github.io/school-of-sre/level101/databases_sql/intro/">Relational databases(MySQL)</a></li>
<li><a href="https://linkedin.github.io/school-of-sre/level101/databases_nosql/intro/">NoSQL concepts</a></li>
<li><a href="https://linkedin.github.io/school-of-sre/level101/big_data/intro/">Big Data</a></li>
</ul>
</li>
<li><a href="https://linkedin.github.io/school-of-sre/level101/systems_design/intro/">Systems Design</a></li>
<li><a href="https://linkedin.github.io/school-of-sre/level101/metrics_and_monitoring/introduction/">Metrics and Monitoring</a></li>
<li><a href="https://linkedin.github.io/school-of-sre/level101/security/intro/">Security</a></li>
</ul>
</li>
<li>
<p>Level 102</p>
<ul>
<li><a href="https://linkedin.github.io/school-of-sre/level102/linux_intermediate/introduction/">Linux Intermediate</a></li>
<li>Linux Advanced<ul>
<li><a href="https://linkedin.github.io/school-of-sre/level102/containerization_and_orchestration/intro/">Containers and orchestration</a></li>
<li><a href="https://linkedin.github.io/school-of-sre/level102/system_calls_and_signals/intro/">System Calls and Signals</a></li>
</ul>
</li>
<li><a href="https://linkedin.github.io/school-of-sre/level102/networking/introduction/">Networking</a></li>
<li><a href="https://linkedin.github.io/school-of-sre/level102/system_design/intro/">System Design</a></li>
<li><a href="https://linkedin.github.io/school-of-sre/level102/system_troubleshooting_and_performance/introduction/">System troubleshooting and performance improvements</a> </li>
</ul>
</li>
</ul>
<p>We believe continuous learning will help in acquiring deeper knowledge and competencies in order to expand your skill sets, every module has added references that could be a guide for further learning. Our hope is that by going through these modules we should be able to build the essential skills required for a Site Reliability Engineer.</p>
<p>At LinkedIn, we are using this curriculum for onboarding our non-traditional hires and new college grads into the SRE role. We had multiple rounds of successful onboarding experiences with new employees and the course helped them be productive in a very short period of time. This motivated us to open source the content for helping other organizations in onboarding new engineers into the role and provide guidance for aspiring individuals to get into the role. We realize that the initial content we created is just a starting point and we hope that the community can help in the journey of refining and expanding the content. Check out <a href="CONTRIBUTING/">the contributing guide</a> to get started.</p>
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