The scp invocation is syntactically fine. Single quotes on the scp variable arguments would be wrong - the variables would not get expanded by the shell. Double-quotes are generally the safe way to to ...
For Linux, Mac, and Windows (PowerShell) an sftp session or scp command to an HPC front-end host can be done easily from on-campus (main or VIMS) or off-campus through the bastion host. In the ...