If we perform the following 3 hardenings for our tenant/customer Linux VM,
will it affect any sysadmin operation (say if password is forgotten, can't recover
back the VM or we can help apply patches for the tenant) and break any apps ?
CIS 1.5.3 Set Boot Loader Password
No boot loader password set. Can we set boot loader password and any concern ?
CIS 1.5.4 Require Authentication for Single-User Mode
No single-user mode password set. Can we set password protection when boot to single user mode and any concern ?
CIS 1.5.5 Disable Interactive Boot
Interactive Boot is enabled. Any concern to disable interactive boot ?