Provisioning new VM’s (guests) using “virt-install” binary is straight forward. virt-install can be run in interactive or non-interactive mode. This command have more options but easy to remember since those are very meaningful. This article is going to demonstrate the VM creation using virt-install tool in non-interactive mode. You can also use GUI (VMM – […]
Redhat Linux
RHEL 7.2 – Configuring KVM hosts – Part 3
KVM hosts needs to be prepared to store and provide the network access to the guest machines. In last article ,we have seen KVM package installation and VMM(virtual Machine Manager) package installation. Once you have installed the packages, you need to create the filesystem to store the virtual machines images (/var/lib/libvirt/images which is the default storage […]
Redhat Enterprise Linux – KVM Installation Part 2
This article will demonstrates that how to install the KVM (kernel-based virtual Machines) packages on Redhat enterprise Linux 7.2 . We must have “yum repository” to install the KVM packages and it’s dependencies. There are many GUI tools available to manage the KVM. VMM (Virtual Machine Manager) is famous GUI tool which was developed by […]
Kernel Based Virtual Machine (KVM) – Overview Part 1
KVM is free open source full virtualization solution for Linux on x86 hardware. After the cloud revolution, KVM(Kernel Based Virtual Machine) Virtualization is a hot topic in the industry. Most of the cloud technologies will prefer to use the KVM hypervisors over XEN due to it’s simplicity. Redhat and Ubuntu’s default hypervisor is KVM. Contrast to these vendors, Oracle Linux […]
How to Patch/Update RHEL 7 without internet connection ?
Linux is not a windows operating system to install the security patches and other bug fix patches for every week. At the same time , it’s not like an Unix operating system where you no need to patch it for years. You should plan to patch the Redhat Linux yearly twice to eliminate the security […]
How to Map the VMware virtual Disks for Linux VM ?
Most of the VMware virtual machines are configured with few virtual disks with different size according to the project requirement. When it comes to the Linux VM , there will be a dedicated disk for the root filesystem and other disks are used for application/data. So whenever there is request for resizing the existing drive , it […]
How to Rebuild Hardware RAID from OS level ?
How to rebuild the hardware RAID from the operating system ? Is it possible ? Yes . Using the MegaCLI or LSIutil , we can re-build the hardware RAID for Non-OS disks from the OS. In my case , We have lost the one of the HDD which was part of RAID 0 . It contains […]
How to find the Redhat Linux version & Release details ?
Are you new to Redhat Enterprise Linux ? If yes, this article is going to help you to identify the Redhat Linux version, code name, release name and kernel version. You may require those details to check the application compatibility or future Operating system update. By viewing “/etc/redhat-release” file, you can identify the Redhat version. “unmae […]
How to generate crashdump of VMware Guests using snapshot ?
Root cause analysis is one of the toughest job.If its come to operating system, We mostly engage the Operating system vendors to find the root cause by analyzing the system logs and crashdump.The system logs will not alone help you to identify the root cause all the time and you need crashdump very badly. How the […]
How to scan new FC LUNS and SCSI disks in Linux ?
How to scan new FC LUNS and SCSI disks in Redhat Linux without rebooting the server? Most of the Linux beginners have to wonder how to do this and this article will be for them. It may look very simple as we perform this in daily operation to scan LUNS but the system has much work […]