1: The system generates a 500M file
dd if=/dev/zero of=500M.file bs=1M count=500
2: The scpco service transmits this file (can be used to test the speed of the intranet)
scp root@192.168.3.157:/aaa/500M.file /tmp/
My host is 192.168.3.189
root username
192.168.3.157 Download this file from the target host and add the file location of this host
/ tmp / Download the file to the 192.168.3.189/tmp/ directory