Securely Copy Files (scp) tool to copying files by ssh

A very good tool for securely copying files via the ssh protocol between machines is scp. It allows you to transfer files to the target machine as well as download from a given source. The tool is usually built into the system so it works on many distributions. Below I will present how you can send and download files. For correct file transfer, running ssh service is required, because it is the basis of scp operation. Of course, when using the tool, you can specify the port as the parameter, provided that it has been changed. The standard port used by the ssh daemon is 22. 

Let’s start by creating an example file that we will transfer: 

in the next step, let’s move on to uploading the file. In my case, the port from ssh has been changed to 2222:

The first time you connect, you will be asked for a fingerprint. 
As you can see, the file has been sent correctly. 

Instead of the sign at the end of ‘~‘ we can specify where the target file should be placed (/tmp/example-path): 

There are many combinations, you can send, for example, all files containing the ending (*.tar.gz) to the user’s home directory, which is just symbolized by ‘~‘: 

An interesting parameter is the ‘-r‘ in scp where we can transfer entire folders, example using copying a folder from local machine to remote machine: 

OK, after the file has been successfully sent to the target machine, let’s delete the local file we created above and try to download it back: 

Next, let’s move on to downloading the file from the remote server to the local machine: 

Above I gave an example of how to send an entire folder from a local machine to a remote machine. The other way around, of course, we can also do it. To download a remote folder to a local machine, use the ‘-r‘ parameter:

The scp utility has more parameters, you can get them by reading the man page: 

It is worth paying attention to the ‘-l‘ parameter where we can set the limit of transferred files. This is useful when transferring larger files so as not to overload your connection. 

If you are tired of constantly entering your password, I encourage you to read how you can connect to ssh without providing a password. Then copying files using scp will become more: generate ssh key pair in linux.

In my opinion, scp is good for transferring files quickly one time. However, as often you exchange files between machines a more convenient way is to use sshfs as described here: sshfs great tool to mount remote file system.