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Download centos image http://isoredirect.centos.org/centos/7/isos/x86_64/CentOS-7-x86_64-Everything-1804.iso
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Create a virtual machine
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Install centos (Server with GUI)
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Power off the machine
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Create a host-only network
a. VirtualBox -> Host Network Manager -> Create (vboxnet0)
b. In centos machine -> Settings -> Network -> Adapter 2 -> Enable Network Adapter -> Host only network -> vboxnet0
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Power on the machine
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Check the bi-directional connectivity between guest and host
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Setup pxe server in centos
a. Follow the link - https://www.linuxtechi.com/configure-pxe-installation-server-centos-7/. Use the files in the repo
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Create another machine (pxe-client)
a. Select RAM (2048 MB) and not 1024 MB (Ref: https://www.spinics.net/lists/centos/msg165578.html)
b. Select only one Network adapter - Host only network
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Boot the pxe-client