CentOs7 Grub2

CentOs7 Grub2

[CentOS][Linux]

 デフォルト起動OSを変更する

• http://enakai00.hatenablog.com/entry/2015/11/27/152442

起動OSの確認

# grep "^menuentry" /boot/grub2/grub.cfg | cut -d "'" -f2
CentOS Linux (3.10.0-229.20.1.el7.x86_64) 7 (Core)
CentOS Linux (3.10.0-229.20.1.el7.x86_64) 7 (Core) with debugging
CentOS Linux (3.10.0-229.11.1.el7.x86_64) 7 (Core)
CentOS Linux (3.10.0-229.11.1.el7.x86_64) 7 (Core) with debugging
CentOS Linux 7 (Core), with Linux 3.10.0-229.el7.x86_64
CentOS Linux 7 (Core), with Linux 0-rescue-4b00eec6f028470db654c2536ac2fc83
menuentry "Windows 10"{

現在のデフォルト起動

# grub2-editenv list
saved_entry=CentOS Linux (3.10.0-229.20.1.el7.x86_64) 7 (Core)

変更

# grub2-set-default 6
# head -2 /boot/grub2/grubenv
# GRUB Environment Block
saved_entry=6

サーバー再起動