>>889
正解です。こんな表示になります。フェイルオーバーっていうか、フォー
ルバックですけどね。

Root password for system maintenance (control-d to bypass):
single-user privilege assigned to /dev/console.
Entering System Maintenance Mode

Feb XX XX:XX:XX su: 'su root' succeeded for root on /dev/console
su: No shell /usr/bin/csh. Trying fallback shell /sbin/sh.
-sh: /bin/i386: not found
-sh: /usr/sbin/quota: not found
-sh: /bin/cat: not found
-sh: /bin/mail: not found
# echo * ← ls はできない。ｗ