Hello, I am a master's student in the Department of Convergence Security (Samsung Advanced Security) at Korea University.After graduation, I am expected as a security developer or researcher member of Samsung SDS.
try ubuntu without installing sudo add-apt-repository ppa:yannubuntu/boot-repair sudo apt-get update sudo apt-get install boot-repair -y sudo boot-repair Select recommended repair
sudo add-apt-repository ppa:yannubuntu/boot-repair
sudo apt-get update
sudo apt-get install boot-repair -y
sudo boot-repair
Select recommended repair