单项选择题 The printer associated with the hp5_queue is down for maintenance. Which of the following commands will move the remaining print jobs from hp5_queue to the hp7_queue?（）

单项选择题 After performing a modification on the /etc/ssh/sshd_config file the operator needs to reinitialize the secure shell daemon to enable the new settings. Which of the following is the correct way to achieve this?（）

单项选择题 Which of the following commands will display what space is used in /tmp filesystem?（）