Enter the following under the ubuntu system:
1: The first step
clq@clq-virtual-machine: ~/node$ sr
The program 'sr' has not been installed. You can install it with:
sudo apt install surfraw
2: The second step
clq@clq-virtual-machine:~/node$ sudo apt install surfraw
Wait for the installation to complete.
3: The third step
clq@clq-virtual-machine:~/node$ sr
An automatic pop-up window prompts you to select a file to upload.
ps: If using file download, enter the sz command and follow the system prompts to complete the operation. (sz[file])
{{o.name}}
{{m.name}}