Application of PXE network installation and initialization of memory disk in CentOS7

Answer 1: Step 1: Make sure the TFTP server, NFS server and DHCP server are installed on the PXE server. Step 2: Copy the CentOS7 ISO file to the TFTP server and add its path to the TFTP server. Step 3: Copy the CentOS7 installation file to the NFS server and add its path to the NFS server. Step 4: Set up the DHCP server to provide the client with the IP address, path to the TFTP server and NFS server. Step 5: Start the client. The client will load the CentOS7 ISO file from the PXE server and start installing CentOS7.

Answer 2: The PXE network installation of CentOS7 includes the following steps: 1. Plan a chemical machine with CentOS7 installed as a PXE server. Make sure the machine has enough C drive space to store the installation image and other files. 2. Install and configure DHCP and TFTP services on the PXE server. DHCP is used to assign IP addresses to clients and provide boot information; TFTP is used to transfer boot loaders and installation images. 3. Create the TFTP root directory linux on the PXE server to view the operating system, and copy the CentOS7 boot loader and installation image to this directory. 4. Go into the PXE server's DHCP configuration file and configure the IP address range and the path to the boot loader and installation image. Make sure the path to the bootloader is correct and points to the file in the TFTP root directory.

5. Start the DHCP and TFTP services on the PXE server. 6. Start on the client computer where network installation is to be performed, and set the boot order to network boot in the BIOS or UEFI settings. 7. The client obtains an IP address through DHCP request, and then downloads the bootloader through TFTP. 8. The boot loader downloads the core installation program (vmlinuz) and initializes the video memory c drive (initrd.img) from the TFTP server. 9. After the client computer is downloaded through TFTP, the bootloader will load the core installation program and initialize the video memory c drive. 10. The boot loader will step into a graphical or text interface and the user can select the installation type, partitioning and other installation options. 11. After the user settings are completed, the installer will start to manually install CentOS7. 12. Finally, the system will restart and step into the newly installed CentOS7 operating system. The above are the steps for PXE network installation of CentOS7. Depending on the actual environment and needs, additional configuration and steps may be required. Please note that PXE network installation requires certain network and system management knowledge to ensure correct configuration and smooth installation. Answer 3: Installing CentOS7 using PXE network is a convenient and fast installation method. The following are the steps for CentOS7PXE network installation: 1. First, you need a server with CentOS7 installed as a PXE server. Make sure the server is connected to the network and has DHCP and TFTP services.

2. Install and configure DHCP server. A DHCP server is used to assign IP addresses to newly installed computers. To batch install linux

on CentOS7, you can use the yum command to install the dhcp software package. After the installation is complete, edit the DHCP configuration in the /etc/dhcp/dhcpd.conf file, specify the relevant information of the DHCP server such as subnet, gateway, DNS, etc., and specify the location of the PXE initiator. 3. Install and configure the TFTP server. A TFTP server is used to transfer the launcher and related files. You can also use the yum command to install the tftp package. After the installation is complete, edit the configuration of the TFTP service in the /etc/xinetd.d/tftp file and specify the relevant information of the TFTP server. 4. Prepare the PXE initiator and related files on the PXE server. PXE launcher is a program used to boot a newly installed computer. First, mount the CentOS7 installation CD image file to a directory. After that, copy the PXE-related files to the root directory of the TFTP server, including pxelinux.0, vmlinuz, initrd.img, etc. 5. Configure the BIOS of the newly installed computer. Make sure that the linux shell in the BIOS settings of the newly installed computer has the PXE boot function enabled and the PXE boot device is set as preferred. 6. Start installing the new computer. When a new computer boots up, it sends a DHCP request and receives information back from the PXE server. After getting the response from the TFTP server, the new computer will download the PXE launcher and related filesBatch installation of linux###, and install it according to the instructions of the launcher. Through the above steps, you can implement PXE network installation of CentOS7. These methods can greatly simplify the installation process of a large number of computers and improve work efficiency. ### ###

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