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Named Bind SELinux error: dumping master file: tmp-xxx: open: permission denied

When configuring DNS servers running BIND (named), on a slave server you might encounter the following error when the slave is trying to update its zones from the master server: named[25319]: zone Transfer started. named[25319]: transfer of '' from connected using named[25319]: dumping master file: tmp-NrfJj6zM6s: open: permission denied named[25319]: transfer of '' from failed while receiving responses: permission denied named[25319]:...

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XenServer: Use graphic card 3D in VM – Mapping the GPU to a VM

Mapping the GPU to a VM This section explains how to use GPU Passthrough to assign a PCI graphics card to a guest operating system. The following is a detailed step-by-step guide for XenServer, provided that your system meets the hardware and firmware requirements described above. Enable IOMMU on the host. Edit “/boot/extlinux.conf” and add iommu=1 iommu_inclusive_mapping=1 right after all the instances of /boot/xen.gz As an...

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XenServer: Import Failed when importing hard drive image vhd vmdk with XenCenter

If you want to import a virtual hard drive image or package (vmdk, vhd, ofv, ova etc) to XenServer using XenCenter you might encounter an error which says nothing but: IMPORT FAILED ! After a lot of research and reading I found that you NEED to HAVE INSTALLED a Virtual Machine which actually handles the transfer and which is not installed by default. There is a bash script...

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