<https://paste.ubuntu.com/p/5JNQJsFTBR/>

**The above URL is taken from my boot-repair tool's report.**

I'm new to Linux. I have a laptop computer with 2 hard drive. One is a 1TB ordinary hard disk drive while the other is a 256GB SSD drive. I installed Windows 10 on the SSD drive(sdb). 

**I'm using UEFI boot and Secure Boot is enabled.** At the moment I would prefer keep using UEFI and keep secure boot enabled unless it's really necessary to change them. 

Then I want to install Ubuntu 18.04LTS to get dual boot. During installation I chosed manually partitioning and installed Ubuntu 18.04 into the ordinary hard disk drive(sda). I created 2 partitions, one of which is swap area, and the other is for / (root directory). I did not created any other partition for Linux but I pointed the linux boot loader to the Windows EFI partition(in sdb).

However after installing Ubuntu 18.04 and restarting the computer, there is no grub boot loader showing up and the computer boots directly into Windows 10.
I have checked the BIOS, even **there is not a Ubuntu/Linux boot option to choose in the boot priority order in BIOS**.

**I have tried the boot-repair tool (<https://help.ubuntu.com/community/Boot-Repair>) but it doesn't fix it**, even though it says "Boot succesfully repaired". Hence I upload the boot info to the above URL.

Since I'm new to linux, this has driven me crazy today, please help! Thanks in advance