How to make Arch Grub boot into Ubuntu without password
by imayneed from LinuxQuestions.org on (#5F1SR)
sda1 luks1 encrypted Arch keyfile=/arch.arch
sda2 luks1 encrypted Ubuntu keyfile=/etc/luks/ub.ub
Arch grub is installed in sda.
When I try to boot into Ubuntu, no matter which way I tried, it always says:
"Trying to decrypt master key for sda2:
Enter the password for ..."
The thing is that, for the computer to boot into grub, it is already asking for sda1 at computer boot:
"Trying to decrypt master key for sda1:
Enter the password for ..."
And it is supposedly skip this step for the further passwords.
How can I solve this problem?


sda2 luks1 encrypted Ubuntu keyfile=/etc/luks/ub.ub
Arch grub is installed in sda.
When I try to boot into Ubuntu, no matter which way I tried, it always says:
"Trying to decrypt master key for sda2:
Enter the password for ..."
The thing is that, for the computer to boot into grub, it is already asking for sda1 at computer boot:
"Trying to decrypt master key for sda1:
Enter the password for ..."
And it is supposedly skip this step for the further passwords.
How can I solve this problem?