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  Change the kernel boot sequence after CentOS 7 kernel upgrade
  Add Date : 2018-11-21      
  7 Upgrade CentOS kernel to 3.15.5, but the default boot entry, or 3.10, checked, such an amendment.

Set the default boot Windows (Windows will change the system you want it)

1. First, find the Windows menuentry.

# Cat /boot/grub2/grub.cfg | grep Windows


menuentry "Windows 7 (loader) (on / dev / sda1)" --class windows --class os {

2. Set Windows as the default boot entry (here only use the above command output in double quotes "" or single quotes '' contents)

# Grub2-set-default "Windows 7 (loader) (on / dev / sda1)"

3. Verify that the default boot entry

# Grub2-editenv list


saved_entry = Windows 7 (loader) (on / dev / sda1)
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