#Linux

Introduction: Key points Not limited to this Education and Training: Free Trials: Architecting: Implementing: BOAT Built Operate and Transfer: Fanatic Support: Price Discounts Conclusion: Further reading Introduction: In recent years, public cloud computing has revolutionized the way organizations manage their IT infrastructure. It offers scalability, flexibility, cost-effectiveness, and numerous other benefits. However, selling public cloud solutions to businesses requires a strategic approach. In this blog post, we will explore the key factors that contributed to the successful sale of public cloud services, including education and training, free trials, architecting, implementing, BOAT (Built Operate and Transfer), and providing fanatic support. [Read More]

Exploring Virtualization and Hypervisor Management Introduction Questions Exploring Virtualization and Hypervisor Management This session is checking the knowledge of Virtualization and Hypervisor. Some directly related to Openstack and few virtulization in general. Introduction As the demand for efficient and scalable infrastructure continues to grow, OpenStack has emerged as a leading open-source cloud computing platform. OpenStack engineers play a crucial role in designing, deploying, and managing virtualized environments powered by hypervisors. [Read More]

Introduction Why We Need Physical Servers for Running a Serverless Environment Foundation of Virtualization Resource Allocation and Scaling Hypervisor and Hardware Abstraction Backend Operations and Management Security and Data Protection Conclusion Introduction Serverless computing has gained significant popularity in recent years, promising developers the ability to focus solely on writing code without the need to manage server infrastructure. However, a closer examination reveals that serverless computing is not truly devoid of servers. [Read More]

Understanding the Difference Between SFTP and FTPS SFTP: SSH File Transfer Protocol FTPS: File Transfer Protocol over SSL Understanding the Difference Between SFTP and FTPS When it comes to secure file transfer protocols, two popular options are SFTP (SSH File Transfer Protocol) and FTPS (File Transfer Protocol over SSL). While both protocols serve the same purpose of secure file transfer, they differ in various aspects. In this blog post, we will delve into the key differences between SFTP and FTPS, along with a few use cases for each. [Read More]

Introduction Prerequisitess Install Google’s PAM Intialization Configuring PAM Configuring OpenSSH Making SSH Aware of MFA Introduction One of the secure login method in linux based system is Key Based Authentication. Key authentication provides cryptographic strength that even extremely long passwords can not offer. With SSH, public key authentication improves security considerably as it frees the users from remembering complicated passwords (or worse yet, writing them down). User has private key in his laptop / desktop and public key will be pushed to destination server. [Read More]

Your Linux box is slow and you are running top command. Well, you are seeing a lot of metrics, what does these values means. Major CPU Status Idle, the percentage of idle CPU Running a user space program, a User application running. It could be a compiler, Email client Running the kernel, Handling an interrupts, managing resources The above said meta states can be divided. User space programs can be categorized as those running under their initial priority level or those running with a nice priority. [Read More]

Preface Virtualization My Scenario Process Isolation Further reading Preface How can I make sure that,my virtual server is isolated from the neighbour in same compute host ? Almost all the cloud admins faced this question at least once in their career time. Customer is worrying about the privacy, security of their data. So, question is quiet natural. They completely trust you, but still question remains. How I am isolated from the neary by guests. [Read More]

It happend, What now ? Get into battlefield Monitoring Cell Engineering Cell Customer success Cell Administrative Cell You brought it back Post incident measures It happend, What now ? Its a nightmare for a every cloud provider. Even you take all the measures to prevent, it could be happen. Its called Disaster. You are serving a lot of customers, you have to protect their interests. Because they are also a service provider to their customers. [Read More]

Preface Core services may not running Two different host types No Shared volume No enough Quota Apparmor in place The source compute host swapped No valid host found Further reading Preface Recently I had faced an interesting question during an Interview. Question was, One of the virtual machine is in error state, how will you troubleshoot?. Well, thats a general question and all of them went through it atleast once? [Read More]

What is an Overcommit in cloud ? Overcommitting Memory Overcommitting CPU Why its important in a Public Cloud Where are the Overcommit values in Openstack Well, I have a very special requirement Solution Create the aggregate Add your computes to this Aggregate Setting up Overcommit values to this particular Aggregate How the Guest VM know, i should go to this Aggregate Inject Flavor metadata Check the flavor now Add few filters in nova Disable the current allocation from nova Restart nova Workflow Further Reading What is an Overcommit in cloud ? [Read More]