你可能喜欢
多项选择题
A、记录将主机名映射为IP地址
B、MX记录标识域的邮件交换服务
C、PTR记录将IP地址指向主机名
D、NS记录规定主机的别名
E、CNAME记录将IP地址指向主机名
单项选择题
A、①④
B、②③
C、①③
D、②④
多项选择题
A、echo The current working path is $PWD.
B、echo "The current working path is $PWD." Echo hello
C、echo 'The current working path is $PWD.' Echo hello
D、echo "The current working path is `pwd`."
E、echo The current working path is $PWD. Echo hello
单项选择题
A、date>>/tmp/date
B、date>/tmp/date
C、date 2>/tmp/date
D、date &>/tmp/date