Have you ever been analysed the SAR(System activity reporter) reports on Solaris server for the disk performance issues ? If you would have done that , you might noticed that all the disks & LUN’s will be shown as “ssdXXX” names instead of cXtXdXs2. If you run “iostat” command without “n” option, you can see that […]
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 Deploy VMware VCSA 6.0 on ESXi Directly ?
Prior to the VMware vSphere 6.0 , You will be directly getting the vCenter Appliance’s OVA file from VMware. Using OVA file, you can directly import as a VM in the vCenter server or ESXi host using vSphere client. It can also be done by using the “Deploy the OVF template” option by right clicking on the […]
How to deploy VCSA 6.0 on VMware workstation ?
VMware VCSA (vCenter Server Appliance) 6.0 has eliminated the previous releases limitations and issues. Now VCSA 6.0 is able to provide the all the features what the Windows vCenter servers is providing currently. In other words , there is no difference between Windows vCenter and VCSA. So it s up to the customer to choose […]
How to Configure the networking on VMware ESXi 6.0 ?
Once you have installed the VMware ESXi 6.0 using the interactive installer , You need to configure the network and set the hostname. By default, it takes the IP from DHCP and it sets the hostname as “localhost”. In this article ,we will see the post installation of VMware ESXi 6.0. In the Enterprise setup, […]
How to install VMware vSphere 6.0 ESXi
In this article , we will see the installation of vSphere 6.0 VMware ESXi . There are multiple ways to install the ESXi. If you are planning to install less than 10 ESXi hosts, you can prefer the typical interactive installation method. In this method, we need to boot the physical X86 server using the […]
VMware vSphere 6.0 vs vSphere 5.x – Difference
In March 2015, VMware has released the much-awaited VMware vSphere 6.0 . Is it completely different from the previous VMware releases vSphere 5.5 and vSphere 5.1 ? No. The most of the features are remains same but there are lot of enhancement made on the existing features. For an example, VMware has brought lot improvements on the VM […]
How to download support bundle from VCSA vCenter 6.0 ?
This article is going to demonstrate that how to download the support bundle from VMware vCSA 6.0. If you raise the support case with VMware for vSphere environment , they will ask you to provide the support bundle of vCenter server in the first shot. The support bundle normally includes the ESXi hosts configurations, vCenter server configurations […]
How to configure the firewall using firewall-cmd ?
In the last article, we have opened the port (80) for http service using firewall-config graphical utility in Redhat Enterprise Linux 7. As a Unix/Linux admin , would you prefer to use “GUI” over “command line” ? I don’t think so. Most of the Unix/Linux system administrators will go with the command line. firewall-cmd is a […]
Playing with firewalld on RHEL 7
The Linux kernel includes a powerful network filtering subsystem called netfilter. The netfilter subsystem allows kernel modules to inspect every packet which are travelling to the system. Any incoming, outgoing and forwarded network packets can be inspected, modified ,dropped or rejected in a programmatic way ,before reaching to the user space. But these programs needs […]