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Init vs SystemD Linux | DevOps | Interview | Tech Arkit

What is the difference between Init (SysVinit) and SystemD in Linux. #init #systemd #sysvinit #server #linuxserver #linuxadministrator #techarkit

Boot Process: When the computer boots up, the system BIOS or UEFI firmware hands control over to the bootloader (such as GRUB). The bootloader then loads the Linux kernel into memory and passes control to it.

Kernel Initialization: The Linux kernel initializes hardware, mounts the root filesystem, and starts the init process.

init Process: The init process is the first process started by the kernel and has process ID 1. It's responsible for initializing the system and managing system services.

Runlevels: SysVinit organizes the system startup and shutdown process into runlevels. A runlevel defines a state of the system, indicating which services should be started or stopped. Common runlevels include single-user mode, multi-user mode, and graphical mode. Each runlevel has associated initialization scripts that start or stop services.

Initialization Scripts: The initialization scripts, located in directories like /etc/init.d, are shell scripts responsible for starting, stopping, and managing individual services. These scripts are executed sequentially during system startup and shutdown, following the instructions defined for each runlevel.

Dependency Handling: SysVinit relies on a simple dependency system, where services are started in a predefined order based on their dependencies. However, managing complex interdependencies between services can be challenging with SysVinit.

Manual Service Management: In SysVinit, administrators often manually manage services using commands like service or chkconfig, which interact with the initialization scripts to start, stop, enable, or disable services.

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squid proxy server in RHEL7 | RHCE | Tech Arkit

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Node Port vs Cluster IP Kubernetes | DevOps | Interview | Tech Arkit

NodePort: NodePort is a type of service that exposes a service on a specific port of each node in the cluster. When you expose a service using NodePort, Kubernetes will allocate a specific port on every node in the cluster (usually in the range 30000-32767) and any traffic sent to this port will be forwarded to the corresponding service. NodePort is typically used when you need to access a service from outside the Kubernetes cluster, for example, to expose a web application to the internet. ClusterIP: ClusterIP is a type of service that exposes a service on an internal IP address that is only reachable from within the Kubernetes cluster. This is the default type of service in Kubernetes. ClusterIP is used for communication between services within the cluster.

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PODs in Kubernetes Explained | Tech Arkit

In Kubernetes, a pod is the smallest and simplest unit in the deployment model. It represents a single instance of a running process in a cluster and is the basic building block for deploying and managing containerized applications. A pod encapsulates one or more containers, storage resources, a unique network IP, and configuration options. The primary purpose of using pods is to provide a logical and cohesive unit for application deployment and scaling.

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Production Kubernetes Cluster Setup | kubeadm cluster | Tech Arkit Production Kubernetes cluster installation and configuration step by step guide. #kubernetes #kubeadm #kubelet #kubectl #techarkit

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Git and GitHub Full Course | Tech Arkit

Welcome to TechArkIT! In this video, we are going to delve deep into the world of version control with a comprehensive exploration of Git. Whether you're a beginner looking to grasp the fundamentals or an experienced developer seeking a refresher, this video has something for everyone. So, let's embark on this journey to demystify Git.

Table of Contents: Introduction to Version Control

What is version control? The importance of version control in software development. Git: A Brief Overview

History and development of Git. Key features that set Git apart. Installing Git

Step-by-step guide to installing Git on different operating systems. Configuring Git for the first time. Git Basics

Creating a Git repository. Understanding the working directory, staging area, and repository. The Git lifecycle: adding, committing, and pushing changes. Branching and Merging

The concept of branches in Git. Creating and switching branches. Merging branches to consolidate changes. Dealing with merge conflicts. Remote Repositories

Introduction to remote repositories. Cloning a remote repository. Pushing and pulling changes from remote repositories. Collaboration with Git

Collaborative workflows using Git. Handling contributions from multiple developers. Code reviews and pull requests. Advanced Git Concepts

Rebasing and its advantages. Cherry-picking commits. Git hooks and customizing Git's behavior. Git Best Practices

Guidelines for effective version control. Commit message conventions. Keeping your Git history clean and organized. Git Hosting Platforms

Popular Git hosting platforms like GitHub, GitLab, and Bitbucket. Setting up your repository on these platforms. Git GUI and IDE Integration

Overview of Git GUI tools. Integrating Git into popular Integrated Development Environments (IDEs). Troubleshooting Git Issues

Common Git problems and their solutions. Debugging techniques for Git.

By the end of this video, you'll have a solid understanding of Git, its core concepts, and how to use it effectively in your software development projects. Whether you're working on personal coding projects, collaborating with a team, or just curious about version control, this knowledge will empower you.

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From Linux to AWS - A Comprehensive Guide for Cloud Practitioners TechArkit.  

 Transitioning from a Linux-based environment to Amazon Web Services (AWS) involves learning new tools, services, and concepts specific to the cloud. Here is the video which covers required services in depth.

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Multi Availability Zone Auto Scaling Group Deployment with ALB | Tech Arkit

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Python for Non-Programming Background Video 1 | Tech Arkit

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Viral Linux Interview Questions and Answers | Tech Arkit

* What is SSH-tunnel ? * How to set history size ? * How to extend VG ? * What are logical & extended partitions ? * Explain the steps to reset root password at boot time ?* What are run-levels ? How many types of run levels are there ? * How we change the run level ? * How to check the logs ? * Difference between Journalctl & tail command ? * What does the subscription -manager do ? * How to archive a file ? * What is umask ? * How to kill a process ? * How to assign IP address manually ? * How to assign static IP address to a system ? * Explain the different type s of Linux process states ? * What is a Zombie process ? * What is KVM ? * What is hypervisor ? * Difference between MBR & GPT ? * How you can mount a file system permanently ? * What is cron ? How to setup a cron job ? * What is Kickstart ? * How to create a network bridge in Linux ? * Difference between iptables & firewalld * What is SElinux ? * What is ISCSI & targetcli ? * Difference between NFS & SAMBA ? * What is nfsnobody ? * What is SSHFS ? * What is Kerberos ? * How to secure NFS with Kerberos ? * What is the difference between telnet & SSH ? * What is DHCP ? * What is Kickstart file ? * What is NTP Server ? How to configure NTP ?

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Types of Bond Interfaces in Linux | Tech Arkit

Follow Us on Social Media WhatsApp Group: https://bit.ly/TechArkitWhatsAppGroup Join Telegram Group: http://t.me/linuxarkit 3000 Members Joined GitHub: https://github.com/techarkit/ FB Private Group: 5K members https://www.facebook.com/groups/arkitcoin Facebook: https://www.facebook.com/linuxarkit Twitter: https://twitter.com/aravikumar48 Instagram: https://www.instagram.com/arkit.co.in/ Website: https://arkit.co.in Blog: https://techarkit.blogspot.com/ Reddit: https://www.reddit.com/r/techtutorial/ Email: aravikumar48[at]gmail.com Quora: https://www.quora.com/q/cxfarqipmxzajyne?invite_code=eaA2xM8guZ4pBOcQwzbs

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How to Access Linux Machine GUI and CLI | Linux for Beginners | RHCSA 20...

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20 Best Tutorials to Learn AWS Completely Free resource

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Application security services from AWS | Tech Arkit

AWS Web Application Firewall (WAF): AWS Web Application Firewall (WAF) is a security solution that protects web applications from typical web exploits and assaults such as SQL injection and cross-site scripting (XSS). It can be used to secure AWS-hosted websites and APIs, as well as on-premises applications. A corporation, for example, can employ WAF to safeguard its online store from attacks that could jeopardise consumer data.

AWS Shield: AWS Shield is a managed DDoS protection service that protects web applications hosted on AWS from large-scale attacks. It provides real-time monitoring and automatic mitigation of DDoS attacks. A company, for example, can use AWS Shield to protect their online banking platform from DDoS attacks, which could cause service disruption and financial loss.

AWS Certificate Manager (ACM): AWS Certificate Manager (ACM) is a service that provides SSL and TLS certificates to be used with Amazon Web Services (AWS) and your own applications. It makes provisioning, managing, and deploying SSL/TLS certificates simple, ensuring that data in transit is encrypted and secure. A company, for example, can use ACM to secure its online payment gateway and protect sensitive customer data during transmission.

AWS Secrets Manager: Secrets Manager is a service that allows you to easily rotate, manage, and retrieve database credentials, API keys, and other private information throughout their entire lifespan to help protect access to your applications, services, and IT resources. A company, for example, can use Secrets Manager to manage database access and ensure that only authorized users have access to sensitive data.

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Mastering IAM: The Key to AWS Service Management | Tech Arkit

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Unlock Efficiency Gains with AWS Migration Secrets! | Tech Arkit

AWS DataSync is a managed data transfer service that simplifies and accelerates the migration of large amounts of data between on-premises storage systems and AWS services. DataSync automates much of the traditionally manual process of transferring data, enabling organizations to move data quickly and efficiently while reducing operational overhead and costs.

With DataSync, users can easily and securely transfer data to and from Amazon S3, Amazon EFS, and Amazon FSx for Windows File Server, as well as other storage solutions using the Network File System (NFS) or Server Message Block (SMB) protocols. The service supports both one-time and ongoing transfers, and it can transfer data over the internet or via AWS Direct Connect, depending on your needs.

Some of the key features of DataSync include:

Easy setup and management: DataSync can be set up and managed through the AWS Management Console, command-line interface (CLI), or API.

Automated transfers: DataSync automates many of the manual steps involved in data migration, including scheduling and error handling.

Data validation: DataSync validates data integrity during the transfer process, ensuring that files are not corrupted or lost.

Fast data transfer: DataSync uses a variety of techniques to accelerate data transfer, including multi-threading, data compression, and data caching.

Secure data transfer: DataSync uses SSL encryption to secure data in transit and offers support for AWS Identity and Access Management (IAM) to manage user access.

Overall, AWS DataSync is a powerful and flexible data transfer service that enables organizations to move data quickly, securely, and reliably to and from AWS services.