A.cd/usr退出目录/usr中
B.d..进入(退到)上一层目录,两个点代表父目录
C.cd不带参数,则默认回到家目录
D.cd-进入前一个目录,适用于在两个目录之间快速切换
A./etcetworks/dhcpd
B./usr/sbin/dhcp
C./etcetworks/dhcp
D./usr/sbin/dhcpd
A./etc/modprobe.conf
B./usr/lib/`uname -r`/config
C./boot/drivers.conf
D./etc/param.conf
A./tmp/hadoop-hadoop
B./usr/hadoop-hadoop
C./usr/local/hadoop-hadoop
D./usr/local/src/hadoop-hadoop