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How do I change the boot order in CentOS 7?
You can use grub2-set-default command to set default boot kernel, to set first kernel in grub2. cfg as default run and reboot.
How do I change the default boot in Linux?
Command line method Step 1: Open up a terminal window (CTRL+ALT+T). Step 2: Find the Windows entry number in the boot loader. In the screenshot below, you’ll see that “Windows 7…” is the fifth entry, but since entries start at 0, the actual entry number is 4. Change the GRUB_DEFAULT from 0 to 4, then save the file.
How do I change the default grub boot in CentOS 7?
You can also refer to it by the /etc/grub2. cfg file which is a symbolic link. To force a system to always use a particular menu entry and to set default boot kernel, use the menu entry name as the key to the GRUB_DEFAULT directive in the /etc/default/grub file.
How to change default boot kernel on CentOS 6?
The first step to change the default boot kernel on CentOS 6 is to get a list of all available kernel images added to GRUB. The following command will show you the list. From the list, identify the kernel that you want to set as default. Each kernel in the list is assigned by GRUB a numeric entry value starting from 0 in an increasing order.
What do the boot options do in CentOS?
The CentOS installation system includes a range of boot options for administrators, which modify the default behavior of the installation program by enabling (or disabling) certain functions. To use boot options, append them to the boot command line, as described in Configuring the Installation System at the Boot Menu.
Which is the default boot loader for CentOS 5 and 6?
The following post shows the procedure to boot CentOS/RHEL/OEL 5 and 6 systems into different kernel installed. CentOS/RHEL/OEL 5 and 6 operating system uses GRUB as the default boot loader.
How do I set default boot kernel in Grub?
To force a system to always use a particular menu entry and to set default boot kernel, use the menu entry name as the key to the GRUB_DEFAULT directive in the /etc/default/grub file. GRUB 2 supports using a numeric value as the key for the saved_entry directive to change the default order in which the kernel or operating systems are loaded.