What is Docker? Docker is a container run time engine. Docker provides the power of operating system using minimal resources. Docker support application development in monolithic situations. In other words, developers can develop the applications, ship the container and deploy it anywhere. The destination could be a virtual machine, physical server or cloud instances (AWS, […]
VxVM – Disk group has no valid configuration copies
Veritas volume manager is robust volume manager software and mostly used on Oracle Solaris, HP-UX and Linux Operating systems. In some cases, after the host reboot, you might get an error that “Disk group has no valid configuration copies” when you try to import the existing Veritas disk group. This error common in SRDF environment […]
Self Managing Kubernetes – Turbonomic 6.1
I have been worked on Unix and then move to Linux, then virtualized Linux Environment using VMware vSphere and now overseeing the journey to cloud-native. Technology just keeps changing and we need to adopt new technologies, make it more efficient and more profitable to the customer. Service-based IT firms and vendors are forced to evolving and innovating to stay […]
RHEL7/CentOS 7 – Recover/Reinstall GRUB2 with UEFI
This article will provide the step by step procedure to recover the GRUB RHEL7 / CentOS7 which uses UEFI. In last article, we have demonstrated the BIOS-based system’s GRUB recovery. The newer system ships with UEFI firmware and here is the way to identify BIOS vs UEFI on Linux servers. To recover GRUB2 on RHEL7 /CentOS 7 with […]
How to Recover GRUB on RHEL 7 / CentOS 7 ?
This article will provide the step by step procedure to recover the GRUB on REHL 7 / CentOS 7. GRUB corruption / lost is one of the most common issues on Linux servers/workstations. The possible reasons for grub corruption could be due to bad disk/bug on the firmware or powered off the system abruptly. Systems ships […]
How to find Linux is under BIOS or UEFI mode ?
How would you find your Linux server booted in BIOS mode or UEFI mode? What’s the main difference between BIOS and UEFI? Servers which had shipped prior to the 2011 year have only BIOS firmware installed by default. BIOS is legacy firmware used only on X86 hardware and its 16-bit code. BIOS will take more time for […]
Safeguard VM Backup in Cloud Using – NAKIVO
Small organizations can’t afford multiple data-centers to operate. Due to the cloud revolution, small companies are operating their production servers in the cloud directly but the various factor, companies might still prefer on-premise infrastructure. In such cases, keeping the backup in the same site a not a safe. NAKIVO Backup & Replication provides a great […]
Speculative Store Bypass Disable – CVE-2018-3639 – SSBD
Google [Jann Horn (Google Project Zero) ] and Microsoft [Ken Johnson (Microsoft Security Response Center) ] found another security flaw on the modern processor architecture. An unprivileged attacker can use this flaw to bypass restrictions in order to gain read access to privileged memory that would otherwise be inaccessible. This issue has been assigned CVE-2018-3639 and is […]
How to Install Python 3 on Redhat Enterprise Linux 7.x ?
Python is available on most of the operating systems in the world. By default Redhat provides 2.7x version on Redhat Enterprise Linux 7.x. But the new development is mostly happening on Python 3.x version since 2.x is legacy. If you need python 3.x, then you need to install it using the Redhat software repository (if […]
How to Upgrade/Update Redhat Linux to Specific version ? RHSM
This article will talk about how to update / upgrade Redhat Enterprise Linux to specific minor release when you use in Red Hat Subscription Manager. It will also discuss about how to prevent YUM from updating kernel and packages but only to the security updates. In many cases , you might need to tie with specific version […]