I need encrypt root file system. I used below command cryptsetup -y -v luksFormat /dev/sda1But i am getting below error.WARNING!======== This will overwrite data on /dev/sda1 irrevocably.Are you sure? (Type uppercase yes): YESEnter passphrase:Verify passphrase:[   94.408069] alg: No test for fips(ansi_cprng) (fips_ansi_cprng)Cannot format device /dev/md126p2 which is still in use.Command failed with code 16: Device or resource busyCould anyone please help me how to encrypt root file system in linux system.Thanks,
Encrypt root file system linux
linux;cryptsetup