Introduction to Inode File descriptors, file table and inode table in Linux. Image Source: Wikipedia An inode is a data structure on a filesystem on Linux and other Unix-likeoperating systems that stores all the information about a file except its name and its actual data. Inode is created during creation of file along with file…
Author: Charanjit Cheema
Charanjit is currently working as a Cloud Architect at Mphasis, with 17 years of experience in IT infrastructure projects, implementation, and support. While his main role is as a DevOps engineer, he holds a Cloud Architect position and has strong skills in cloud technologies and automation. His expertise includes Terraform, Ansible, AWS, Azure DevOps, Azure Cloud, VMware, and Linux systems.
Charanjit is passionate about automating tasks and improving processes. He uses tools like Terraform and Azure DevOps to build and manage cloud infrastructure and streamline deployment. He also enjoys using Shell scripts and Ansible playbooks to make systems run more efficiently.
In his free time, Charanjit enjoys learning about new technologies and sharing his knowledge through his blog. When he’s not working, he likes listening to music, having a cup of coffee, and relaxing in nature.
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How to recover or rebuild initramfs in CentOS 7 Linux
Corruption of initramfs can be occur by many ways for example after patching CentOS 7 Linux OS or installing a buggy device driver in server you found CentOS 7 Linux server has become unbootable. You may also encouter below kernel panic error because server initramfs got damaged . CentOS 7 Linux Kernel Panic screen Now…
How to Set password policy in CentOS or RHEL system
Linux is known for one of most secure Unix Operating System (OS) in world. But that is not mean it is 100% secure there is say in Information Technology (IT) no technology is a completely secure that is why from a System Administrator to CIO they take measure for securing IT infrastructure on regular basis…
How to use Amazon Cloudwatch to monitor my AWS EC2 resources
Amazon CloudWatch is a monitoring service which monitor AWS resources on Cloud. It comes with dozen of monitoring metrics which ease Cloud Admin to use them in monitoring their AWS Infrastructure services resources like Amazon EC2 instances, Amazon S3 Cloud Storage, Amazon RDS (Relational Database Service) on Cloud etc. It collects monitoring and operational data…
How to convert Amazon EC2 On Demand instance to Amazon EC2 Reserve Instance
I was using t2 micro instance for my WordPress website for one year on trial basis as most of you might know AWS provide 750 hours/month free tier usage of its t2 micro instance for a year. But as year passed my instance usage reached high and its trial usage also reached to finish. Due…
How to backup Linux machine to Amazon S3
AWS Amazon S3 is a Simple Cloud object storage solution provided by Amazon. Have a look below what Amazon write and say about S3: Amazon Simple Storage Service (Amazon S3) is an object storage service that offers industry-leading scalability, data availability, security, and performance. This means customers of all sizes and industries can use it…
What is Windows subsystem for Linux?
Microsoft has added Windows Subsystem for Linux (WSL) from Microsoft Windows 10 version 1607 onward and Windows Server 2019 it has replaced the older Windows Services for Unix it is like WINE in Linux which provide compatible layer for running Windows based application on Linux likewise WSL provide a subsystem or layer on which different Linux distro…
To Activate the Virtual MFA device authentication for AWS console access.
Multi-Factor authentication (MFA) is an extra layer of security, it is a combination of more then one credentials which authenticates the user example combination of user password with security token (software or hardware based), using of biomatric verification for authenticating the user credentials. By adding extra layer in security it make difficult for unauthorised person…
Red Hat Enterprise Linux 8 Beta major features and improvement
Red Hat has launched the beta version of Red Hat Enterprise Linux 8 (RHEL 8) for users and developers for testing purpose and getting feedback from them. Red Hat Inc. which is developing RHEL 8 has announced this operating system beta version for public use on November 14, 2018. Four year ago when Red Hat…
Segmentation Fault error in Linux / Unix system
You were running a program installed in your Linux/Unix system and suddenly that program get stop and it log error in its logs memory segmentation fault error or you might executing a command in Linux / Unix server say you are working on LVM extension or VG scanning but you are unable to do so…