Secure boot / lockdown verified:
ubuntu@jammysecure:~$ uname -r 6.2.0-23-generic ubuntu@jammysecure:~$ cat /sys/kernel/security/lockdown none [integrity] confidentiality ubuntu@jammysecure:~$ sudo dmesg | grep -i lockdown [ 0.000000] Kernel is locked down from EFI Secure Boot mode; see man kernel_lockdown.7 [ 0.277387] LSM: initializing lsm=lockdown,capability,landlock,yama,integrity,apparmor [ 1.574798] Lockdown: swapper/0: hibernation is restricted; see man kernel_lockdown.7
Secure boot / lockdown verified:
ubuntu@ jammysecure: ~$ uname -r jammysecure: ~$ cat /sys/kernel/ security/ lockdown jammysecure: ~$ sudo dmesg | grep -i lockdown capability, landlock, yama,integrity, apparmor
6.2.0-23-generic
ubuntu@
none [integrity] confidentiality
ubuntu@
[ 0.000000] Kernel is locked down from EFI Secure Boot mode; see man kernel_lockdown.7
[ 0.277387] LSM: initializing lsm=lockdown,
[ 1.574798] Lockdown: swapper/0: hibernation is restricted; see man kernel_lockdown.7