>>798

# freebsd-update install
Updates cannot be installed when the system securelevel
is greater than zero.
# sysctl kern.securelevel
kern.securelevel: 1
# sysctl -w kern.securelevel=0
kern.securelevel: 1
sysctl: kern.securelevel: Operation not permitted

rc.conf 書き換えてリブートしか方法ない?