Which of the following will rename dir1 as dir2?（）……

单项选择题An operator needs to change from the usr bin to the var spool directory. Which of the following commands will accomplish this?（）

A. cd /var/spool
B. lcd /var/spool
C. cd /usr/bin /var/spool
D. lcd /usr/bin /var/spool

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?（）

A. export $LPDEST=hp7_queue
B. qmov -m hp7_queue -P hp5_queue
C. lpmov -s hp5_queue -d hp7_queue
D. redirect -q hp5_queue 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?（）

A. Use refresh -s sshd
B. Use init.sshd /etc/rc.ssh
C. Use /usr/sbin/sshd -restart
D. Use stopsrc -s sshd and then startsrc -s sshd

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

A. df -Ik /tmp
B. df -fk /tmp
C. df -Uk /tmp
D. df -Fk /tmp