Category: Operating System

An operating system (OS) is system software that manages computer hardware and software resources and provides common services for computer programs.

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I/O Block Size Best Practice on EMC All Flash/Hybrid Flash Array and Linux (Physical And Virtual)

We have a problem on our Oracle Database servers which are hosting by Oracle Linux servers, when Oracle Databases putting to Maximum Availability protection mode, some workloads impacts performance whole database ecosystem. The workloads are related to some tasks which performed from by application servers and the tasks needs huge read/write I/O on storage arrays. We are using DELL EMC Unity/Unity XT (All Flash/Hybrid Flash) family in most of projects. I did lots of searches and found nothing at first step. I had only one clue, I/O block size was very large during performing tasks by database servers.

PSWindowsUpdate 0

Download and Install Windows Updates Remotely via PSWindowsUpdate PowerShell Module

Operating system is the core of any system and we have to keep operating system update cause of preventing performance issues, unplanned downtime and fix security vulnerabilities. Windows (client and servers) has a standard terminology for receiving updates monthly and most of organizations using Windows Server Update Services to applying updates of multiple servers/client. Updates would be downloaded and installed on multiple servers/clients automatically but service downtime is always the biggest concern but another concern is installing updates on multiple machines and rebooting systems during planned downtime. PowerShell and WinRM would help us when they come as PSWindowsUpdate PowerShell module!

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Rocky Linux, The Rightful Successor to CentOS

CentOS born from nothing and was everything for some businesses but Red Hat deposed him from the kingdom. I have published a post about CentOS Replacement Candidates and Rocky Linux was one of candidates. Rocky Linux was under development by Rocky community and release candidate version of Rocky Linux was released on April 30, 2021.

Windows Upgrade Path 0

Guest Operating System Upgrade or New Virtual Machine?

Virtual Machine needs guest operating system (OS) to operates same as physical machine. Operating system is a system software and has life cycle same as other software. But what should we do about updating and upgrading guest operating systems in virtual environments. Guest Operating System Life-Cycle Most implemented services don’t need to any new features on operating system, so we should choose guest operating system with long term support. Both Windows and Linux (Some distributions) offering different of channels. You can choose a path that more stable or choose a path for have new features. Update vs Upgrade When you...

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Linux Deduplication and Compression

Cost of storage is the biggest piece of IT budget in any company (Of course not EMC, HPE or other like them 😀 ) and the storage spaces is eating by databases, other data files and backup files as well. Lot of those data file not be used once generated!. I have serious issue with these types of data and especially log files that one of dark data types. I can’t stop generating those data and the related teams are always crying about free space on their servers. They want just Linux servers (Seems, they don’t know Windows has NFS...

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CentOS Linux 8 and CentOS Streams

Today, CentOS Linux 8.0.1905 has been released and available to download now. The version is first version of CentOS Linux 8. Same as previous version, the new version is based on Red Hat Enterprise Linux source codes but it’s totally free. CentOS 8 end of life is May 2029 (10 years, same as previous versions). Improvements and fixes are same as RHEL 8 and CentOS 8.0.1905, CentOS includes all new features actually. But there is a big change! Read more on CentOS-8 (1905) Release Notes. What’s CentOS Streams? CentOS Stream is available based on CentOS Linux 8 software packages the...

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What’s FreeDOS?

FreeDOS is an open source DOS-compatible operating system that you can use to play classic DOS games, run legacy business software, or develop embedded systems. Any program that works on MS-DOS should also run on FreeDOS. It doesn’t cost anything to download and use FreeDOS. You can also share FreeDOS for others to enjoy! And you can view and edit our source code, because all FreeDOS programs are distributed under the GNU General Public License or a similar open source software license. FreeDOS Software Since 1998, each program included in the FreeDOS distribution is made available as a “package.” The...

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What’s redhat-upgrade-tool?

The redhat-upgrade-tool provides a way to upgrade Red Hat Enterprise Linux 6 systems to Red Hat Enterprise Linux 7. The redhat-upgrade-tool command is a program to collect the information for upgrade and prepare the environment. It includes downloading kernel, and initial ram image, and packages.