1. Boot from U disk
1. Use UltraISO to extract the ISO downloaded from the RedHat official website to the U disk
Do not use Lao Maotao and other PE boots to install the ISO, otherwise the installation will fail and an error will be reported dracut-pre-udev[351]:modprobe :ERROR:could not insert 'floppy' dracut-pre-udev[351]:modprobe :ERROR:could not insert 'edd'.
2. Dell desktop U disk boot can be set in BIOS
Press the [F2] key to enter the BIOS setup interface when starting up, change the secure Boot Enable item to Disabled; switch the boot list Opion to uefi; uncheck the ptt sercurity PTT ON; switch the SATA operation in the system configuration to AHCI ;Finally press [esc] key to save and exit.
details as follows:
- When the Dell computer is turned on, press the [F2] key several times in succession to enter the BIOS setting interface, and then find and expand the [secure BOOT] item.
- Select the [secure Boot Enable] item, and change it to [Disabled], and then close the [Secure Boot] item, otherwise there may be a problem of no suitable images.
- Switch to the [BOOT Sequence] item, and select [uefi] mode in the boot mode module of [boot list Opion].
- Switch to the [sercurity] interface, uncheck the [PTT ON] item in the [ptt security] column.
- Switch to the [system configuration] item, click the [SATA operation] hard disk mode, and change it to the [AHCI] mode.
- Press [esc] key to save and exit, and it will automatically enter the U disk to start after restarting.