Linux网络重装Centos，Fedora

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wget -O /boot/initrd.img http://mirror.centos.org/centos/7/os/x86_64/images/pxeboot/initrd.img
wget -O /boot/vmlinuz http://mirror.centos.org/centos/7/os/x86_64/images/pxeboot/vmlinuz
cp /boot/initrd.img /
cp /boot/vmlinuz /

nano /etc/grub.d/40_custom

menuentry "InstallCentOS7" {
    set root='(hd0,msdos1)'
    linux /vmlinuz repo=http://mirror.centos.org/centos/7/os/x86_64/ ip=45.129.2.183 netmask=255.255.254.0 gateway=45.129.2.1 nameserver=1.1.1.1
    initrd /initrd.img
}

ip可以直接写ip=dhcp也可以，如果是用dncp的话

grub2-mkconfig --output=/boot/grub2/grub.cfg
grub2-set-default InstallCentOS7

或

grub-mkconfig --output=/boot/grub/grub.cfg
grub-set-default InstallCentOS7

Fedora同理

wget -O /boot/initrd.img https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/images/pxeboot/initrd.img
wget -O /boot/vmlinuz https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/images/pxeboot/vmlinuz
cp /boot/initrd.img /
cp /boot/vmlinuz /

nano /etc/grub.d/40_custom

menuentry "InstallFedora30" {
    set root='(hd0,msdos1)'
    linux /vmlinuz repo=https://dl.fedoraproject.org/pub/fedora/linux/development/rawhide/Everything/x86_64/os/ ip=dhcp
    initrd /initrd.img
}

注：这是rawhide版，也就相当于测试版，如需正式版，自己找

grub2-mkconfig --output=/boot/grub2/grub.cfg
grub2-set-default InstallFedora30

如果系统是grub的话

grub-mkconfig --output=/boot/grub/grub.cfg
grub-set-default InstallCentOS7

即可