• Here is the syntax that makes scp support spaces (source):

  $ scp foo.com:"/home/fubar/some\ folder/file.txt" ./
  

• Copy a bunch of files to a remote server (or how to use find with scp):

  $ find /var/log/ -iname "*.log" -type f | xargs -i scp '{}' [email protected]:/media/backup/logs/
  

• Redirect local 8081 port to proxy.company.com:8080 via a SSH tunnel passing through the authorized-server.company.com machine:

  $ ssh -T -N -C -L 8081:proxy.company.com:8080 [email protected]
  

• Use rsync over different SSH port (source):

  $ rsync --progress -vrae 'ssh -p 8022' /home/user/docs/ [email protected]:/home/user/docs/
  

Other resources:

• SSH quoting