把A机下的/root/.ssh/id_rsa.pub 复制到B机的 /root/.ssh/authorized_keys文件里用到的命令为(____)。
A.scp /root/.ssh/id_rspub root 192.168.1.181:/root/.ssh/authorized_keys
B.cp /root/.ssh/id_rsA.pub root 192.168.1.181:/root/.ssh/authorized_keys
C.copy /root/.ssh/id_rsA.pub root 192.168.1.181:/root/.ssh/authorized_keys
D.ssh copy /root/.ssh/id_rsA.pub root 192.168.1.181:/root/.ssh/authorized_keys
正确答案是A