Per default Virtual Box only assigns 1 CPU core to the virtual machine. For most server-side applications 40 GB is more than enough. It can be slightly slower at runtime, but you probably won't notice it unless you use the image for any kind of performance tests that require a lot of IO.Īnd finally, we have to set the file location and maximum size of the hard disk file. I usually choose 'dynamically allocated' as this initially takes less disk space.

In the next step, we have to decide if we want to use a 'dynamically allocated' or 'fixed size' hard disk file. There are several choices, but I usually use the default VDI (Virtual Disk Image) format. Next, we have to configure the hard disk of the guest operating system. Our virtual machine needs some RAM, let's add 4GB. Guest operating systemįirst, we have to provide a name for the virtual machine and the type of operating system (Linux) and the version (Red Hat 64 bit). We create a new virtual machine by clicking on the new item. In case you use Ubuntu 17.04 or 17.10 as your host system you can find an excellent installation guide here. Click the Done button to confirm your changes.The example is based on Virtual Box 5.2. To disable the KDUMP kernel crash dumping mechanism, select the KDUMP option under the System heading and uncheck the Enable kdump checkbox.

This is an advanced option that depends on your requirements. This will initiate a configuration pop-up where you can set up your partitioning manually. If you want to use other file systems (such as ext4 and vfat) and a non-LVM partitioning scheme, such as btrfs. Select the I will configure partitioning checkbox and choose Done. If you do not have enough free space, you can reclaim disk space and instruct the system to delete files. It will automatically create an LVM logical volume in the XFS file system. This ensures the selected destination storage disk will automatically partition with the /(root), /home and swap partitions. Under the Other Storage Options heading, select the Automatically configure partitioning checkbox. CentOS 7 will be installed on the selected disk. Check your machine’s storage under the Local Standard Disks heading. Select Installation DestinationĬlick the Installation Destination option under the System heading.

Wait for the system to check for software dependencies before you move on to the next option. When you have selected the base environment and optional add-ons, click the Done button.

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