DevOps & Cloud (AWS, AZURE, GCP) Tech Free Learning

☄️ 𝗕𝗲𝘀𝘁 𝐘𝐨𝐮𝐭𝐮𝐛𝐞 📱 𝐜𝐡𝐚𝐧𝐧𝐞𝐥𝐬 𝗧𝗼 𝗟𝗲𝗮𝗿𝗻 𝗗𝗲𝘃𝗢𝗽𝘀 ♾ 🌐 LogicOps Lab by Ravish Rawat ( Real time Interview's ) 🔗 https://lnkd.in/g3rtbjHb 🌐 Real time projects @mr.cloudbook 🔗 https://lnkd.in/gWWqHnJx 🌐 Train With Shubham by Shubham Londhe 🔗 https://lnkd.in/g9SwADkB 🌐 Tech Tutorials with Piyush by Piyush sachdeva (Azure and GCP cloud) 🔗 https://lnkd.in/g4iWpScc 🌐 TechWorld With Nana by Nana Janashia 🔗 https://lnkd.in/g7iFKKb9 🌐 KodeKloud by Mumshad Mannambeth 🔗 https://lnkd.in/g2jdc__p 🌐 Stéphane Maarek 🔗 https://lnkd.in/gzSbeKFt 🌐 Technical Guftgu by Bhupinder Rajput l भूपिंदर राजपूत l بھوپندر راجپوت In Hindi 🔗 https://lnkd.in/g8FYMCAS 🌐 Cloud Advocate by Krishna Chaitanya Gadhiraju (GK) 🔗 https://lnkd.in/giNb536Y 🌐 Abhishek Veeramalla 🔗 https://lnkd.in/gMfRacqy 🌐 Cloud Champ by Nasiullha Chaudhari 🔗 https://lnkd.in/gYUQ4r5x 🌐 Praveen Singampalli 🔗 https://lnkd.in/gVAeX8dZ 🔵 𝐅𝐨𝐥𝐥𝐨𝐰 @prodevopsguy 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐬𝐮𝐜𝐡 𝐜𝐨𝐧𝐭𝐞𝐧𝐭 𝐚𝐫𝐨𝐮𝐧𝐝 𝐜𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬!!! // 𝐉𝐨𝐢𝐧 𝐟𝐨𝐫 𝐃𝐞𝐯𝐎𝐩𝐬 𝐃𝐎𝐂𝐬: @devopsdocs

📢 Updated and refactored Terraform configuration files ➡️Ref Commit ➡️ Updated security-groups.tf with correct variable references for security group IDs and IP addresses. ➡️ Refined route-table.tf and vpc.tf with proper variable declarations and references for public/private subnet IDs and VPC configurations. ➡️ Refactored ec2.tf to align with updated variable names and security group IDs for EC2 instances. ➡️ Revised subnets.tf to correct variable declarations for subnet IDs and availability zones. ➡️ Added missing variable declarations for security groups, subnet IDs, instance types, and other resources in variables.tf. ➡️ Updated providers.tf and terraform-dev.tfvars to ensure proper variable management and compatibility. ➡️ Addressed deprecated vpc argument in aws_eip resource within ig_natgw.tf. ➡️ General improvements and fixes across multiple Terraform files for better resource management and clarity. 💬 𝐅𝐨𝐥𝐥𝐨𝐰 @prodevopsguy 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐬𝐮𝐜𝐡 𝐜𝐨𝐧𝐭𝐞𝐧𝐭 𝐚𝐫𝐨𝐮𝐧𝐝 𝐜𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬!!! // 𝐉𝐨𝐢𝐧 𝐟𝐨𝐫 𝐃𝐞𝐯𝐎𝐩𝐬 𝐃𝐎𝐂𝐬: @devopsdocs

𝐓𝐡𝐞 𝐦𝐨𝐬𝐭 𝐜𝐨𝐦𝐦𝐨𝐧 𝐉𝐞𝐧𝐤𝐢𝐧𝐬 𝐞𝐫𝐫𝐨𝐫𝐬 𝐚𝐧𝐝 𝐭𝐡𝐞𝐢𝐫 𝐬𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬 1. 𝐏𝐞𝐫𝐦𝐢𝐬𝐬𝐢𝐨𝐧 𝐈𝐬𝐬𝐮𝐞𝐬: - 😣 𝐄𝐫𝐫𝐨𝐫: Jenkins can't access files. - ✅ 𝐒𝐨𝐥𝐮𝐭𝐢𝐨𝐧: Give Jenkins proper access rights or run it as the right user. 2. 𝐁𝐮𝐢𝐥𝐝 𝐅𝐚𝐢𝐥𝐮𝐫𝐞𝐬: - 😡 𝐄𝐫𝐫𝐨𝐫: Builds fail. - ✅ 𝐒𝐨𝐥𝐮𝐭𝐢𝐨𝐧: Check logs, fix issues like missing stuff or wrong settings. 3. 𝐖𝐨𝐫𝐤𝐬𝐩𝐚𝐜𝐞 𝐂𝐥𝐞𝐚𝐧𝐮𝐩 𝐈𝐬𝐬𝐮𝐞𝐬: - 🚫 𝐄𝐫𝐫𝐨𝐫: Workspace gets messy. - ✅ 𝐒𝐨𝐥𝐮𝐭𝐢𝐨𝐧: Configure Jenkins to clean up after builds. 4. 𝐏𝐥𝐮𝐠𝐢𝐧 𝐂𝐨𝐦𝐩𝐚𝐭𝐢𝐛𝐢𝐥𝐢𝐭𝐲: - 😬 𝐄𝐫𝐫𝐨𝐫: Plugins don't work with Jenkins. - ✅ 𝐒𝐨𝐥𝐮𝐭𝐢𝐨𝐧: Update or find compatible plugins. 5. 𝐌𝐚𝐬𝐭𝐞𝐫-𝐒𝐥𝐚𝐯𝐞 𝐂𝐨𝐧𝐧𝐞𝐜𝐭𝐢𝐨𝐧 𝐏𝐫𝐨𝐛𝐥𝐞𝐦𝐬: - 😞 𝐄𝐫𝐫𝐨𝐫: Master can't talk to slaves. - ✅ 𝐒𝐨𝐥𝐮𝐭𝐢𝐨𝐧: Check the network, slave online, and credentials right. 6. 𝐎𝐮𝐭 𝐨𝐟 𝐌𝐞𝐦𝐨𝐫𝐲 𝐄𝐫𝐫𝐨𝐫𝐬: - 😰 𝐄𝐫𝐫𝐨𝐫: Jenkins runs out of memory. - ✅ 𝐒𝐨𝐥𝐮𝐭𝐢𝐨𝐧: Give Jenkins more memory. 7. 𝐉𝐞𝐧𝐤𝐢𝐧𝐬 𝐍𝐨𝐭 𝐒𝐭𝐚𝐫𝐭𝐢𝐧𝐠: - 😨 𝐄𝐫𝐫𝐨𝐫: Jenkins won't start. - ✅ 𝐒𝐨𝐥𝐮𝐭𝐢𝐨𝐧: Check logs for issues, like port conflicts or wrong configs. 8. 𝐏𝐥𝐮𝐠𝐢𝐧 𝐈𝐧𝐬𝐭𝐚𝐥𝐥𝐚𝐭𝐢𝐨𝐧 𝐈𝐬𝐬𝐮𝐞𝐬: - 😒 𝐄𝐫𝐫𝐨𝐫: Can't install plugins. - ✅ 𝐒𝐨𝐥𝐮𝐭𝐢𝐨𝐧: Fix internet, firewall, and proxy settings. 9. 𝐒𝐥𝐨𝐰 𝐁𝐮𝐢𝐥𝐝 𝐄𝐱𝐞𝐜𝐮𝐭𝐢𝐨𝐧: - 😴 𝐄𝐫𝐫𝐨𝐫: Builds take forever. - ✅ 𝐒𝐨𝐥𝐮𝐭𝐢𝐨𝐧: Speed up builds by parallelizing tasks, optimizing code, or upgrading hardware. 10. 𝐄𝐦𝐚𝐢𝐥 𝐂𝐨𝐧𝐟𝐢𝐠𝐮𝐫𝐚𝐭𝐢𝐨𝐧 𝐏𝐫𝐨𝐛𝐥𝐞𝐦𝐬: - 😟 𝐄𝐫𝐫𝐨𝐫: Email notifications messed up. - ✅ 𝐒𝐨𝐥𝐮𝐭𝐢𝐨𝐧: Check email settings. 11. 𝐒𝐂𝐌 𝐂𝐨𝐧𝐟𝐢𝐠𝐮𝐫𝐚𝐭𝐢𝐨𝐧 𝐄𝐫𝐫𝐨𝐫𝐬: - 😤 𝐄𝐫𝐫𝐨𝐫: Source code setup is wrong. - ✅ 𝐒𝐨𝐥𝐮𝐭𝐢𝐨𝐧: Verify settings for Git, SVN, etc. 12. 𝐉𝐞𝐧𝐤𝐢𝐧𝐬 𝐉𝐨𝐛 𝐓𝐫𝐢𝐠𝐠𝐞𝐫𝐢𝐧𝐠: - 😕𝐄𝐫𝐫𝐨𝐫: Jobs not running. - ✅𝐒𝐨𝐥𝐮𝐭𝐢𝐨𝐧: Review job triggering settings. Remember, always read the error messages and logs, and you can usually figure things out. If you're still stuck, ask the Jenkins community for help. 😊 ❤️ 𝗙𝗼𝗹𝗹𝗼𝘄 @prodevopsguy 𝗳𝗼𝗿 𝗺𝗼𝗿𝗲 𝘀𝘂𝗰𝗵 𝗰𝗼𝗻𝘁𝗲𝗻𝘁 𝗮𝗿𝗼𝘂𝗻𝗱 𝗰𝗹𝗼𝘂𝗱 & 𝗗𝗲𝘃𝗢𝗽𝘀!!! // Join for DevOps DOCs: @devopsdocs

▶️ Harsh reality of many DevOps roles. Your current DevOps role may not make you future-ready.

DevOps is not just CI/CD.

The best part - Your life doesn’t end here. 1. aws. amazon. com > AWS Free Tier > Sign up 2. aws. amazon. com > AWS Whitepapers & Guides > Pick a White Paper 3. Build a project 4. Github. com > awesome-aws > Find AWS libraries, open source repos, guides, blogs, and other resources. 5. Install Minikube 6. Github. com > awesome-Kubernetes ... repeat remember the word 'awesome' awesome-terraform awesome-ansible 📱 𝗙𝗼𝗹𝗹𝗼𝘄 @prodevopsguy 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐬𝐮𝐜𝐡 𝐜𝐨𝐧𝐭𝐞𝐧𝐭 𝐚𝐫𝐨𝐮𝐧𝐝 𝐜𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬!!! // 𝐉𝐨𝐢𝐧 𝐟𝐨𝐫 𝐃𝐞𝐯𝐎𝐩𝐬 𝐃𝐎𝐂𝐬: @devopsdocs

Azure Cloud Bootcamp 2024 with projects live now 🔥 Claim/Register for all benifits 🐦 (Free Azure DevOps Course Included) 🆓 ⚡️ Bootcamp Syllabus: https://blog.prodevopsguy.xyz/complete-azure-bootcamp-2024-with-azure-devops-your-ultimate-course-to-mastering-the-cloud ⚡️ Purchase link: https://topmate.io/prodevopsguytech/1181373 - Complete Azure Cloud - Free real time projects - Life time access to content - Unlimited downloads, offline viewing - 24/7 Support available ⚡️ 𝗙𝗼𝗹𝗹𝗼𝘄 @prodevopsguy 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐬𝐮𝐜𝐡 𝐜𝐨𝐧𝐭𝐞𝐧𝐭 𝐚𝐫𝐨𝐮𝐧𝐝 𝐜𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬!!! // 𝐉𝐨𝐢𝐧 𝐟𝐨𝐫 𝐃𝐞𝐯𝐎𝐩𝐬 𝐃𝐎𝐂𝐬: @devopsdocs

▶️ Azure DevOps project ideas that can enhance your skills and showcase your ability to implement DevOps practices: 🔢. Continuous Integration/Continuous Deployment (CI/CD) Pipeline: - Build a CI/CD pipeline for a web application using Azure DevOps. - Integrate automated testing and deployment to Azure App Service. 🔢. Infrastructure as Code (IaC): - Use Azure Resource Manager (ARM) templates or Terraform to provision and manage Azure resources. - Automate the deployment of an application with all required services (like databases, storage). 🔢. Monitoring and Logging Solution: - Implement a monitoring solution using Azure Monitor and Application Insights. - Create dashboards to visualize application performance and logs. 🔢. Microservices Architecture: - Develop a microservices-based application using Azure Kubernetes Service (AKS). - Set up CI/CD pipelines for individual microservices and manage them with Helm charts. 🔢. Serverless Application: - Create a serverless application using Azure Functions. - Integrate with Azure Logic Apps for orchestrating workflows. 🔢. Automated Testing Framework: - Develop a test automation framework using Selenium or Cypress. - Integrate the framework with Azure DevOps for automated testing during builds. 🔢. ChatOps Implementation: - Use Azure DevOps with Microsoft Teams to automate build notifications and issue tracking via chat commands. 🔢. Data Pipeline Project: - Create a data processing pipeline using Azure Data Factory. - Implement data ingestion, transformation, and loading into a data warehouse or lake. 🔢. Security and Compliance: - Set up Azure DevOps to include security scans (using tools like SonarCloud) and compliance checks in the CI/CD process. 🔢🔢. Integrate Third-Party Services: - Build a project that integrates third-party APIs (e.g., GitHub, Jira) into Azure DevOps workflows for enhanced collaboration. ➡️ These projects can be tailored according to your interests and expertise level, allowing you to explore various features of Azure DevOps while building practical applications.

Here are the main Azure CLI command groups: 1. Account - az account - az account clear - az account list - az account show - az account set 2. AD - az ad - az ad app - az ad group - az ad sp - az ad user 3. Advisor - az advisor - az advisor recommendation 4. Aks - az aks - az aks browse - az aks create - az aks delete - az aks get-credentials - az aks list - az aks scale - az aks show - az aks update 5. Api - az api - az api create - az api delete - az api list - az api show - az api update 6. Appconfig - az appconfig - az appconfig create - az appconfig delete - az appconfig list - az appconfig show - az appconfig update 7. Appservice - az appservice - az appservice create - az appservice delete - az appservice list - az appservice show - az appservice update 8. Backup - az backup - az backup container - az backup item - az backup job - az backup policy - az backup protected-item - az backup recovery-point - az backup vault 9. Batch - az batch - az batch account - az batch application - az batch certificate - az batch job - az batch node - az batch pool 10. Billing - az billing - az billing account - az billing enrollment-account - az billing invoice - az billing period - az billing profile - az billing subscription ...and many more! You can use az --help to explore more command groups and commands. Some other commonly used Azure CLI commands include: - az group: Manage resource groups - az resource: Manage resources - az storage: Manage storage accounts - az vm: Manage virtual machines - az network: Manage network resources

Remember to use az --help to get more information about each command and its usage

📱 𝐅𝐨𝐥𝐥𝐨𝐰 @prodevopsguy 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐬𝐮𝐜𝐡 𝐜𝐨𝐧𝐭𝐞𝐧𝐭 𝐚𝐫𝐨𝐮𝐧𝐝 𝐜𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬!!! // 𝐉𝐨𝐢𝐧 𝐟𝐨𝐫 𝐃𝐞𝐯𝐎𝐩𝐬 𝐃𝐎𝐂𝐬: @devopsdocs

𝗨𝗻𝗱𝗲𝗿𝘀𝘁𝗮𝗻𝗱𝗶𝗻𝗴 𝗖𝗼𝗺𝗺𝗼𝗻𝗹𝘆 𝗨𝘀𝗲𝗱 𝗡𝗲𝘁𝘄𝗼𝗿𝗸 𝗣𝗼𝗿𝘁𝘀 🚀 As DevOps and Cloud Engineers, we frequently deal with networking, where understanding ports is crucial for secure and seamless communication between applications and services. Here’s a quick breakdown of some widely used ports and their significance: ➡️𝗛𝗧𝗧𝗣 (𝗣𝗼𝗿𝘁 𝟴𝟬): Used for unencrypted web traffic. It’s the foundation of data communication on the web. ➡️𝗛𝗧𝗧𝗣𝗦 (𝗣𝗼𝗿𝘁 𝟰𝟰𝟯): Secures HTTP traffic with encryption using SSL/TLS. Essential for secure web browsing. ➡️𝗦𝗦𝗛 (𝗣𝗼𝗿𝘁 𝟮𝟮): Enables secure remote login and command execution on servers. Vital for server administration. ➡️𝗙𝗧𝗣 (𝗣𝗼𝗿𝘁 𝟮𝟭): Used for file transfers over a network. Commonly seen in legacy systems. ➡️𝗗𝗡𝗦 (𝗣𝗼𝗿𝘁 𝟱𝟯): Resolves domain names to IP addresses, enabling human-friendly URLs. ➡️𝗠𝘆𝗦𝗤𝗟 (𝗣𝗼𝗿𝘁 𝟯𝟯𝟬𝟲): The default port for the MySQL database. Allows apps to connect and query the database. ➡️𝗞𝘂𝗯𝗲𝗿𝗻𝗲𝘁𝗲𝘀 𝗔𝗣𝗜 𝗦𝗲𝗿𝘃𝗲𝗿 (𝗣𝗼𝗿𝘁 𝟲𝟰𝟰𝟯): Used for controlling and managing Kubernetes clusters. ➡️𝗗𝗼𝗰𝗸𝗲𝗿 𝗗𝗮𝗲𝗺𝗼𝗻 𝗔𝗣𝗜 (𝗣𝗼𝗿𝘁𝘀 𝟮𝟯𝟳𝟱/𝟮𝟯𝟳𝟲): Interacts with the Docker Engine for container management. ➡️𝗠𝗼𝗻𝗴𝗼𝗗𝗕 (𝗣𝗼𝗿𝘁 𝟮𝟳𝟬𝟭𝟳): Default port for MongoDB, a popular NoSQL database. ➡️𝗡𝗚𝗜𝗡𝗫 (𝗣𝗼𝗿𝘁𝘀 𝟴𝟬/𝟰𝟰𝟯): Acts as a web server or reverse proxy, handling HTTP/HTTPS traffic. ➡️𝗚𝗿𝗮𝗳𝗮𝗻𝗮 (𝗣𝗼𝗿𝘁 𝟯𝟬𝟬𝟬): Visualizes metrics and logs. ➡️𝗣𝗿𝗼𝗺𝗲𝘁𝗵𝗲𝘂𝘀 (𝗣𝗼𝗿𝘁 𝟵𝟬𝟵𝟬): Collects and stores time-series data for monitoring. ➡️𝗧𝗼𝗺𝗰𝗮𝘁 (𝗣𝗼𝗿𝘁 𝟴𝟬𝟴𝟬): A web server for Java applications. ➡️𝗔𝗽𝗮𝗰𝗵𝗲 𝗞𝗮𝗳𝗸𝗮 (𝗣𝗼𝗿𝘁 𝟵𝟬𝟵𝟮): Used for distributed messaging and data streaming. ➡️𝗥𝗲𝗱𝗶𝘀 (𝗣𝗼𝗿𝘁 𝟲𝟯𝟳𝟵): An in-memory database for caching and real-time analytics. ➡️𝗥𝗗𝗣 (𝗣𝗼𝗿𝘁 𝟯𝟯𝟴𝟵): For remote desktop connections, mainly in Windows environments. ➡️𝗘𝗹𝗮𝘀𝘁𝗶𝗰𝘀𝗲𝗮𝗿𝗰𝗵 𝗔𝗣𝗜 (𝗣𝗼𝗿𝘁 𝟵𝟮𝟬𝟬): Provides search and analytics capabilities. ➡️𝗝𝗲𝗻𝗸𝗶𝗻𝘀 (𝗣𝗼𝗿𝘁 𝟴𝟬𝟴𝟬): Automates CI/CD processes in software development. ➡️𝗦𝗠𝗧𝗣 (𝗣𝗼𝗿𝘁 𝟮𝟱): Used for sending emails between servers. Understanding these ports helps in configuring firewalls, troubleshooting connectivity issues, and securing applications.

🐬 Docker Networking: When Containers Talk: Decoding the Secret Language of Docker Networking. 🔢: Bridge (Default): ➡️ The default, isolated network where containers get unique IP addresses and can communicate with other containers on the same host. ➡️Use Cases: ➡️ Ideal for most containerized applications that need network isolation and communication within the host. ➡️ Well-suited for development, testing, and staging environments. 🔢: None: ➡️ Disables networking entirely, isolating the container from any network. ➡️Use Cases: ➡️ Niche use cases where no network access is required (e.g., headless tasks, security-sensitive processes). ➡️ Not recommended for general-purpose container usage. 🔢: Host: ➡️ Shares the host's network namespace, allowing containers to directly use the host's IP address and ports. ➡️Use Cases: ➡️ Exposing container services to the host's network without complex port mappings. ➡️ Useful for testing and development, but exercise caution due to potential security risks in production. 🔢: Overlay: ➡️ Description: Creates a virtual network across multiple Docker hosts, enabling container communication regardless of their physical location. ➡️Use Cases: ➡️ Orchestrated deployments with Docker Swarm or Kubernetes where containers need to communicate across hosts. ➡️ Highly scalable network for distributed applications. 😎 𝗙𝗼𝗹𝗹𝗼𝘄 @prodevopsguy 𝗳𝗼𝗿 𝗺𝗼𝗿𝗲 𝘀𝘂𝗰𝗵 𝗰𝗼𝗻𝘁𝗲𝗻𝘁 𝗮𝗿𝗼𝘂𝗻𝗱 𝗰𝗹𝗼𝘂𝗱 & 𝗗𝗲𝘃𝗢𝗽𝘀!!! // Join for DevOps DOCs: @devopsdocs

**🚀 Master Kubernetes Manifests: From Beginner to Advanced!** 📄 New article alert! Dive into "Writing Kubernetes Manifests: Beginner to Advanced" and elevate your Kubernetes skills! 🛠 🔍 What you'll learn: ✅ Basics of Kubernetes manifests ✅ Writing Pod, Deployment, and Service manifests ✅ Advanced techniques like multi-container Pods, secrets, and autoscaling ✅ Best practices for scalable, maintainable configurations 📚 Whether you're a beginner or looking to refine your expertise, this guide has you covered with practical examples and detailed explanations! 🌐 Read now on Dev.to: 🖥 https://dev.to/prodevopsguytech/writing-kubernetes-manifests-from-beginner-to-advanced-31bg ✨ Don't forget to share and bookmark for your DevOps journey! 🙌

▶️ Docker interview Question for Freshers 1. What is Docker? 2. What are Docker containers? 3. How is Docker different from a virtual machine? 4. What is the purpose of Docker images? 5. What is Docker Hub? 6. How do you create a Docker container? 7. What is a Dockerfile, and how is it used? 8. What is the docker ps command? 9. How do you stop and remove a running Docker container? 10. What is the difference between docker run and docker exec? 11. How do you list all the Docker images on your system? 12. What is the docker-compose command used for? 13. How do you copy files from a Docker container to the host? 14. What is a Docker volume? 15. How do you map ports between your Docker container and host? 16. How do you attach to a running Docker container? 17. What is the Docker Compose file format version? 18. What is a Docker registry? 19. How do you view Docker container logs? 20. What is the docker network command? 21. What is Docker Desktop, and how does it differ from Docker Engine? 22. How do you view Docker container resource usage? 23. What is the purpose of the CMD instruction in a Dockerfile? 24. How do you pull an image from Docker Hub? 25. What is the ENTRYPOINT instruction in a Dockerfile? 26. How do you share data between Docker containers? 27. What is the .dockerignore file used for? 28. How do you create a Docker image from a Dockerfile? 29. What is the docker tag command, and how is it used? 30. How do you run a Docker container in the background (detached mode)? 31. What is the purpose of the EXPOSE instruction in a Dockerfile? 32. How do you remove all stopped containers in Docker? 33. How do you set environment variables for a running Docker container? 34. What is Docker Swarm? 35. How do you check the status of all containers running in Docker? 36. What is the difference between Docker’s COPY and ADD instructions in Dockerfile? 37. What is the docker system prune command? 38. What is the docker-compose up command used for? 39. How do you limit a container’s CPU and memory usage? 40. How do you add a volume to a Docker container? 📱 𝗙𝗼𝗹𝗹𝗼𝘄 @prodevopsguy 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐬𝐮𝐜𝐡 𝐜𝐨𝐧𝐭𝐞𝐧𝐭 𝐚𝐫𝐨𝐮𝐧𝐝 𝐜𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬!!! // 𝐉𝐨𝐢𝐧 𝐟𝐨𝐫 𝐃𝐞𝐯𝐎𝐩𝐬 𝐃𝐎𝐂𝐬: @devopsdocs

As a DevOps engineer, mastering the Linux 🐧 command line is crucial for efficient system administration and management. Here are some essential Linux commands you should know: 1️⃣. File and Directory Management: ls: List directory contents. cd: Change directory. pwd: Print working directory. mkdir: Create a new directory. rm: Remove files or directories. cp: Copy files or directories. mv: Move or rename files or directories. 2️⃣. User and Permission Management: useradd: Add a new user. passwd: Set or change user passwords. chown: Change file ownership. chmod: Modify file permissions. su: Switch user. sudo: Execute commands with superuser privileges. 3️⃣. Process and Service Management: ps: Display running processes. top: Monitor system processes. kill: Terminate processes. systemctl: Manage system services (systemd-based systems). service: Manage services (init-based systems). 4️⃣. Networking and System Monitoring: ifconfig or ip: Configure network interfaces. netstat: Display network statistics. ping: Test network connectivity. df: Show disk space usage. free: Display memory usage. uptime: Show system uptime.

Remember that this is just a starting point, and there are many more Linux commands and utilities. Feel free to explore and deepen your knowledge as you work with Linux in your DevOps journey! 🐧 🚀

➡️Reference links: [1] [2] [3] [4] 📱 𝗙𝗼𝗹𝗹𝗼𝘄 @prodevopsguy 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐬𝐮𝐜𝐡 𝐜𝐨𝐧𝐭𝐞𝐧𝐭 𝐚𝐫𝐨𝐮𝐧𝐝 𝐜𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬!!! // 𝐉𝐨𝐢𝐧 𝐟𝐨𝐫 𝐃𝐞𝐯𝐎𝐩𝐬 𝐃𝐎𝐂𝐬: @devopsdocs

Not a joke, many DevOps engineers don’t fully understand the pod.yaml file structure or the role each part plays in defining a pod. 📱 𝗙𝗼𝗹𝗹𝗼𝘄 @prodevopsguy 𝐟𝐨𝐫 𝐦𝐨𝐫𝐞 𝐬𝐮𝐜𝐡 𝐜𝐨𝐧𝐭𝐞𝐧𝐭 𝐚𝐫𝐨𝐮𝐧𝐝 𝐜𝐥𝐨𝐮𝐝 & 𝐃𝐞𝐯𝐎𝐩𝐬!!! // 𝐉𝐨𝐢𝐧 𝐟𝐨𝐫 𝐃𝐞𝐯𝐎𝐩𝐬 𝐃𝐎𝐂𝐬: @devopsdocs