[spark-hadoop@master ~]$ sudo scp /etc/profile spark-hadoop@slave1:/etc

spark-hadoop@slave1's password:

scp: /etc/profile: Permission denied

[spark-hadoop@master ~]$ sudo scp /etc/profile root@slave1:/etc

root@slave1's password:

profile                                                                                                                                                                   100% 2595     2.5KB/s   00:00

[spark-hadoop@master ~]$