Use the rz command to upload files to the Linux system of the virtual machine and
upload them to the folder under the root directory
usr/local/src
The file can be selected in the first two times, but the upload fails.
The third upload speed is always displayed as 0
After the fifth time to
home/users/
Folder uploaded successfully
So far, it has been confirmed that it is a problem of user permissions. Use
sudo rz
Uploaded again and it was successful.