OEL6/boot partition deletion and recovery

I have been using linux for a while. although I am not proficient in it, the daily application maintenance is still okay. yesterday I intentionally formatted the/boot partition directly and tried to restore it today, let's see how we know about linux startup. success is the best practice. Don't try these things on weekdays...

I have been using linux for a while. although I am not proficient in it, the daily application maintenance is still okay. yesterday I intentionally formatted the/boot partition directly and tried to restore it today, let's see how we know about linux startup. success is the best practice. Linux will soon forget it if you don't have to worry about it on weekdays.
1. OEL6 does not own a dvd disc, and only has down an ISO file of the dvd. it is installed in the http mode of network. First, create a USB flash drive linux boot disk (using UltraISO to write data into the hard disk image ), therefore, after the boot is killed, only the boot disk of the USB flash drive linux is used.
2. partition description:/dev/sda3 mount/boot
/Dev/sda4 is LVM, VG name is vg_heliy, and the following two mount: // and swap
3. delete a partition

Author: "Yun home-no shadow in Mind"