2 centos7 启动文件优化

1 修改网卡名称和禁用ipv6
控制网卡名称内核参数：net.ifnames=0 biosdevname=0

​ 控制ipv6功能内核参数： ipv6.disable=1

2 永久修改操作步骤

step1: 修改grub默认文件

[root@localhost Desktop]# cat /etc/default/grub 
GRUB_TIMEOUT=5
GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)"
GRUB_DEFAULT=saved
GRUB_DISABLE_SUBMENU=true
GRUB_TERMINAL_OUTPUT="console"
GRUB_CMDLINE_LINUX="ipv6.disable=1 net.ifnames=0 biosdevname=0 rd.lvm.lv=centos/root rd.lvm.lv=centos/swap rhgb quiet"
GRUB_DISABLE_RECOVERY="true"

step2：构建启动grub文件

[root@localhost Desktop]# grub2-mkconfig -o /boot/grub2/grub.cfg 
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-3.10.0-514.2.2.el7.x86_64
Found initrd image: /boot/initramfs-3.10.0-514.2.2.el7.x86_64.img
Found linux image: /boot/vmlinuz-3.10.0-327.36.3.el7.x86_64
Found initrd image: /boot/initramfs-3.10.0-327.36.3.el7.x86_64.img
Found linux image: /boot/vmlinuz-3.10.0-327.el7.x86_64
Found initrd image: /boot/initramfs-3.10.0-327.el7.x86_64.img
Found linux image: /boot/vmlinuz-0-rescue-d885883cdb4944609bc5e3493dd2b680
Found initrd image: /boot/initramfs-0-rescue-d885883cdb4944609bc5e3493dd2b680.img
done

step3: 重启