How to enable administrator account in Windows 8

How to enable administrator account in Windows 8 The built-in ‘administrator’ account in Windows 8 is hidden by default. To enable the ‘administrator’ account in Windows 8, you need to: Open the command prompt using Administrator privileges.  To do so, Click on the command prompt and select ‘Run as administrator’ option as shown in figure […]

“Device eth0 does not seem to be present” error when we move or clone a CentOS 6.3 virtual machine in vSphere

When we move or clone a CentOS 6.3 Virtual machine made in vSphere5.5, and boot the machine once it is moved/cloned, we get the following error: “Device eth0 does not seem to be present”. This is due the fact that whenever we move or clone a Virtual machine, vSphere changes the MAC Address and CentOS […]

List only directories in Linux

How to List only directories in Linux ls command is used in linux to list the files in current directory or the specified directory.  However it doesn’t list the directories only in the given directory.  We can use ls with the combination of grep command to list only directories in a given directory.  ll is […]

How to clean yum cache

How to clean yum cache YUM stands for Yellowdog Updater Modified and is used to install and maintain packages in Linux.  By default, the packages downloaded with yum are kept in cache.  If we need to clean these, the following options are available: yum clean packages yum clean headers yum clean all yum clean packages […]

Enable SSH access on VMWare ESXi 5.5

Enable SSH access on VMWare ESXi 5.5 SSH access on ESXi 5.5 is disabled by default.  To enable SSH access, press F2 key for System Customization, the following screen is displayed.  Click on Troubleshooting options. In Troubleshooting Mode Options, the first option available is Enable ESXi Shell.  ESXi shell is used for some maintenance that […]

How to install VMware vSphere Hypervisor 5.5

How to install VMware vSphere Hypervisor 5.5 vSphere Hypervisor 5.5 is available for download.  It can be downloaded from: https://my.vmware.com/web/vmware/info/slug/datacenter_cloud_infrastructure/vmware_vsphere_hypervisor_esxi/5_5 After you have downloaded the hypervisor, follow the instructions give below to install it. # Burn the downloaded file in a CD/DVD. # Insert the CD and change bios settings towards boot from CD/DVD. # […]

Add swap file in CentOS 6.4

Add swap file in CentOS 6.4 Swapon command with option -s, displays the current swap space in KB. # swapon -s If a file with the name /extraswap already exists, check it with ‘ls’ command and delete it using ‘rm’ command. # ls /extraswap #  rm -rf /extraswap The following dd command example creates a […]

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