Grub2 problem - can only boot to 2 of 3 OS's
jim
jf_byrnes at comcast.net
Fri May 29 02:46:12 UTC 2020
I had a system with Mint18.3 and Ubuntu18 installed. I had 100GB of free
space at the end of the disk. I decided I wanted to install mint19.3 in
the free space. I booted from the Mint19.3 install dvd. I used gparted
to shrink the Ubuntu partition so I ended up with about 195GB of free
space. I then had gparted create a new partition in the free space and
installed Mint19.3.
This is my configuration:
Partition 1 = sda1 - Ubuntu18
Partition 2 (extended) = sda6 - Mint18.3
sda5 - swap
Partition 3 = sda3 - Mint19.3
When the Mint19 install rebooted the first time I noticed the grub menu
was visually much larger looking than I normally saw under Mint18.3 but
I didn't think much of it. When I was done working with Mint19.3 I
restarted the system when the overly large grub menu cam up the only
options were Mint19.3 & Ubutu18, Mint18.3 was not shown.
I booted to Ubuntu and did some googling and read the solution was to
run sudo update-grub2. I ran it. As the output scrolled by I did see
Mint18.3, but when I rebooted Mint18.3 still was not an option. I booted
to Mint19.3 and ran the sudo update-grub2 command but still Mint18.3 is
not an option in the grub menu.
It's been a while since I have installed a fresh OS so what do I need to
do to get Mint18.3 to show up in grub. I upgraded Ubuntu16 to 18 so grub
was not involved there.
Thanks, Jim
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