Unlike ssh, scp uses the uppercase P switch to set the port instead of the lowercase p:

scp -P 80 ... # Use port 80 to bypass the firewall, instead of the scp default

The lowercase p switch is used with scp for the preservation of times and modes.

Here is an excerpt from scp‘s man page with all of the details concerning the two switches, as well as an explanation of why uppercase P was chosen for scp

或者使用rsync -azPp -e "ssh -p80 " current_file  root@192.168.0.1:/root 也可

SCP指定端口号