How to install Linux operating system remotely _unix Linux

First, the introduction in general, we are using the floppy drive or optical drive to boot Linux, and then through the local optical drive to install Linux. However, this installation method does not apply in the following cases: no floppy drive and optical drive: Many companies in order to save costs, computers generally do not have the optical drive or floppy drive, so you can not install Linux locally; non-standard floppy and optical drives: Although the notebook will be configured with optical drive, But they are not necessarily standard IDE devices, some are via USB interfaces, and some are through 1394 interfaces (such as Samsung's Q10). Linux cores that are booted during Linux installation are typically not driven by these interfaces, so it is not possible to install Linux locally; In addition, in some occasions, such as the computer room, there are a large number of computers need to install Linux, if the way through the CD-ROM installation, not only inefficient, is also not conducive to maintenance. In the process of work, I have encountered the second situation. A Samsung Q10 notebook needs to install Redhat Linux 8.0, but after booting through the optical drive, Setup is unable to access the disc. To solve this problem, the author has found the way to install Linux on the Q10 after consulting the data and groping. In the following discussion, if you do not make a special statement, you will take Q10 as an example of how to install Linux remotely via PXE bootrom. II. Basic Principles 1 What is a PXE PXE (Pre-Boot Execution Environment) is a protocol designed by Intel that enables a computer to boot over a network. The protocol is divided into client and server ends, PXE client in the network card ROM, when the computer boot, the BIOS to the PXE client into memory execution, and display the Command menu, after the user selection, PXE The client will be placed on the remote operating system downloaded to the local run via the network. The successful operation of the PXE protocol needs to address the following two issues: since it is transmitted over the network, then the computer at startup, its IP address by who to configure; Download the Linux kernel and root file system through what protocol for the first problem, DHCP server can be resolved by DHCP Server to assign an IP address to the PXE client, DHCP server is the protocol used to dynamically assign IP addresses to DHCP client, but since this is the IP address assigned to the PXE client, when you configure DHCP server, The appropriate PXE-specific configuration needs to be added. As for the second question, the TFTP client is already present in the ROM where the PXE client resides. PXE client uses TFTP client, via TFTP protocol to TFTP SeRVer download the required files. Thus, the conditions for the PXE protocol to run are available, so let's look at how the PXE protocol works.