Locate and change the start time (timeout) centos7 change the boot entry latency

centos7 change the boot entry latency

centos7 has not grub, use grub2.

[Root] # vi /boot/grub2/grub.cfg

Locate and change the start time (timeout)

[root]# grub2-mkconfig -o /boot/grub2/grub.cfg
[root]# reboot

Restart way to see the boot timeout waiting time

Supplementary:
/ *
/ etc / default / GRUB and ???? /etc/grub.d/
* /

A guide Win7:
1. Open /boot/grub2/grub.cfg with the root
2. Found ### BEGIN /etc/grub.d/30_os-prober ###
is added after

menuentry "Windows 7" {
insmod ntfs
set root=(hd0,2)
chainloader +1 }

Description: set root = (hd0,2) wherein hd0 represents a hard disk, the disk 2 represents C

Second, modify the boot sequence:

# grub2-set-default "Windows 7"

Verify that the default startup items:

# grub2-editenv list

Output:

saved_entry=Windows 7

After it's happened executed

# grub2-mkconfig -o /boot/grub2/grub.cfg

# reboot

Original: http://www.cnblogs.com/keleman/archive/2017/04/30/6790795.html

centos7 has not grub, use grub2.

[Root] # vi /boot/grub2/grub.cfg

Locate and change the start time (timeout)

[root]# grub2-mkconfig -o /boot/grub2/grub.cfg
[root]# reboot

Restart way to see the boot timeout waiting time

Supplementary:
/ *
/ etc / default / GRUB and ???? /etc/grub.d/
* /

A guide Win7:
1. Open /boot/grub2/grub.cfg with the root
2. Found ### BEGIN /etc/grub.d/30_os-prober ###
is added after

menuentry "Windows 7" {
insmod ntfs
set root=(hd0,2)
chainloader +1 }

Description: set root = (hd0,2) wherein hd0 represents a hard disk, the disk 2 represents C

Second, modify the boot sequence:

# grub2-set-default "Windows 7"

Verify that the default startup items:

# grub2-editenv list

Output:

saved_entry=Windows 7

After it's happened executed

# grub2-mkconfig -o /boot/grub2/grub.cfg

# reboot

Original: http://www.cnblogs.com/keleman/archive/2017/04/30/6790795.html