[spark-hadoop@master ~]$ sudo scp /etc/profile spark-hadoop@slave1:/etcspark-hadoop@slave1's password: scp: /etc/profile: Permission denied[spark-hadoop@master ~]$ sudo scp /etc/profile root@slave1:/etcroot@slave1's password: profile                                                                                                                                                                   100% 2595     2.5KB/s   00:00    [spark-hadoop@master ~]$