loader will then read /boot/loader.rc, which by default reads in /boot/defaults/loader.conf which sets reasonable defaults for variables and reads /boot/loader.conf for local changes to those variables. loader.rc then acts on these variables, loading whichever modules and kernel are selected.
# name getty type status comments
#
# This entry needed for asking password when init goes to single-user mode
# If you want to be asked for password, change "secure" to "insecure" here
console none unknown off insecure
Note: 一個 insecure 的 console 代表你認定你的 console 的安全等級是 insecure 的, 並且想確定有人想進入單人模式時都要輸入 root 的密碼才行,請注意,insecure 不代表你的 console 是 inscure 的, 而是,如果你要多一點的安全防護,請選擇 insecure,而不是 secure。