How to copy files from one machine to another using ssh

Question

I am using a Linux (CentOS) machine, and I have already connected to another system using SSH.

Now, my question is: How can I copy files from one system to another system?

Suppose, in my environment, I have two system like System A and System B. I'm using System A machine and some other using System B machine.

How can I copy a file from System B to System A? And, copy a file from System A to System B?

somewhat related: make an encrypted archive of local dir/ on remote machine using ssh:
`tar -c dir/ | gzip | gpg -c | ssh user@remote 'dd of=dir.tar.gz.gpg'` — jfs, Dec 24 '13 at 20:49
If you has access of the ftp of the remote server, we can also use wget to download like $wget -r --level=9 --no-parent --reject "index.html*" ftp://<USERID>:<PASSWORD>@<MACHINE-NAME>/path/to Reference1 Reference2 — Mahendran Sakkarai, Jan 19 '15 at 06:22

score 1800 · Answer 1 · edited May 09 '24 at 18:53

1800

Syntax:

scp <source> <destination>

To copy a file from B to A while logged into B:

scp /path/to/file username@a:/path/to/destination

To copy a file from B to A while logged into A:

scp username@b:/path/to/file /path/to/destination

edited May 09 '24 at 18:53

Jeff Schaller

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answered Dec 24 '13 at 09:48

DopeGhoti

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To clarify, you typically don't use scp to copy a file to or from your local machine (System A) while logged in to a remote server (System B) with ssh. scp will log you into the remote server, copy the file, then log you out again in one process, so just run it from a shell on your local machine. That being said, you can use scp if you're logged into System B via SSH and want to copy files between System B and System C. – Garrett Albright Dec 24 '13 at 16:40
@GarrettAlbright, I think the one but last System B should be a System A, right? So: "That being said, you can use scp if you're logged into System A via SSH and want to copy files between System B and System C." – jmc Dec 24 '13 at 17:38
I didn't think you could scp from one remote location to another remote location. I recall trying it once and being admonished by scp. – DopeGhoti Dec 24 '13 at 20:01
1

jmc, nope, I meant it like that. If you're shelled into System B via ssh, you can then execute scp on System B to copy files between System B and some other server ("System C"). The scp process will run on System B, which is the "local" system as far as it will be concerned. – Garrett Albright Dec 25 '13 at 05:41
8

@DopeGhoti. Yes, you can't move files between two remote computers. Either the source or destination must be a local file. However, if you log in to a remote machine with ssh, you can copy files between two remote machines on that machine's command-line. – Gee-Bee Aug 08 '14 at 19:48
Can I use this to copy to my local machine (MacBook)? And if so, where can I look to find out my MacBook's username? – Marco Prins Jan 21 '15 at 07:59
1

At any terminal prompt, you can use whoami to find your username. You can use SSH/SCP to copy to a Macbook, but you have to enable "Remote Login" in System Preferences -> Sharing. This will also tell you your username. – DopeGhoti Jan 21 '15 at 17:56
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Also, an important thing to remember is that you can only scp to a folder on the target machine to which you have permissions. If you are trying to copy it to a destination to which the target user does not have permission, first copy the file to the user's home directory or sub directory and then ssh into the target machine and sudo move it over to the final destination – shaveenk Apr 25 '15 at 20:30
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Remember -r (recursive) and -p (preserve system metadata): scp -rp <file1> <file2> – Rutrus Jul 01 '15 at 07:23
2

I am doing this from a Mac and you don't need your local username. Just the path to the file you want to copy locally and where you want it to go to remotely. Example: scp /home/myuser/sample.txt remoteuser@remoteserver.com:/home/remoteuser/ – Patrick Jul 30 '15 at 15:52
1

In your comment, you explicitly are using the username on the remote system. You can omit the username if your username is the same on the remote system, or if you have settings in .ssh/config for that host to specify the username for you. The rules for the username for scp are identical to those for ssh. – DopeGhoti Jul 31 '15 at 17:32
can path/to/file be a URL to a public file on web? – Jama Aug 25 '15 at 00:19
No, SCP doesn't know how to handle HTTP on either the source or the destination. – DopeGhoti Feb 06 '16 at 18:55
Is there a way for me to specify what port to use? – Jomar Sevillejo Apr 26 '16 at 01:08
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Yes, use -P to specify the TCP port on the remote host. This catches me every time, because ssh uses -p. – DopeGhoti Apr 28 '16 at 18:22
@GarrettAlbright you comment is very ambiguous. I understood exactly nothing. A simple explanation would be "the first argument of scp is the source and second is the destination". Done! – machineaddict Apr 29 '16 at 11:03
2

To be precise: Actually it doesn't matter where you're logged in (on your machine!), but instead it matters where the current shell you're using to run the command (!) is logged in. – Zelphir Kaltstahl Jan 15 '17 at 11:22
1

@machineaddict What my answer addresses that your "simple explanation" does not is that you do not use SCP to copy between two remote systems. Either the source or the destination must be the local machine. – Garrett Albright May 11 '17 at 01:10
Note to future readers of this post, an ssh server needs to be running on the source computer – olfek May 26 '18 at 10:54
If you have ssh config file things are so nice. You can name your machines and do something like this - scp -F ssh_config my-machine-one:/remote_path_to_file /loca_path_to_file – thinklinux Dec 08 '18 at 10:20
@GarrettAlbright What you are missing is that in most cases a user does not know exactly where the file(s) is that they want to copy or their exact names. So, they usually have to ssh into the remote system to find that out before doing the copy. So, in fact they are usually logged into the remote system when they do the copy. – Tyler Durden Jan 11 '19 at 17:25
Yes you can move files between two remote hosts with SCP. One is obviously going to be the source, and the other the destination. You must be logged onto the one that executes the command, one way or another. But they are still both remote. Consider Ansible, Telnet, KVM over IP.
You can only move a file back to the client with SCP if it is running an SSH server.

mckenzm

Sep 09 '19 at 03:37

@GarrettAlbright, what should I use if I am logged in via SSH, if not SCP? – Joe Apr 25 '23 at 13:53

If you strictly want to use ssh and not scp, you can perform something like tar -zcf - file | ssh user@host 'tar -zxf -'. – DopeGhoti Apr 25 '23 at 23:30

@Joe For me the simplest approach is to just open a new terminal/shell/console window and use SCP there. You don't need to log out of the SSH session first. But if you really can't use SCP for some reason (unlikely), see the answer directly above. – Garrett Albright Apr 27 '23 at 18:29

@GarrettAlbright, oh, I see. That is easy. It wasn't a matter of not being able to use scp, but like mentioned above by Tyler Durden, I usually have to ssh in first to know where the file I want is located. I found myself using ssh, exiting, then using scp, then using ssh again. I hadn't thought to just open two terminals. – Joe Apr 27 '23 at 20:15

1

You can usually also use sftp to interactively noodle around in the remote filesystem, and use get file to download file, or put file to upload file. – DopeGhoti Apr 28 '23 at 01:08

score 189 · Answer 2 · edited Nov 21 '19 at 21:22

189

In case if you need an alternate approach.

Install sshfs. if you use ubuntu/debian:

sudo apt-get install sshfs

or, if you use centos/rhel:

sudo yum install fuse-sshfs

or, in macOS

brew install sshfs

Create an empty dir

mkdir /home/user/testdir

"link" or "mount" the two directories

sshfs user@server.com:/remote/dir /home/user/testdir

"unlink" the dirs

fusermount -u /home/user/testdir

On BSD and macOS, to unmount the filesystem:

umount mountpoint

or

diskutil unmount mountpoint

For more see here, linuxjournal.com libfuse/sshfs

edited Nov 21 '19 at 21:22

Rakib Fiha

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answered Dec 24 '13 at 09:58

Ruban Savvy

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If I understand correctly, this gives ACCESS to the remote files, but does not COPY them? – ToolmakerSteve Apr 20 '16 at 02:46
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@ToolmakerSteve you're perfectly right: it creates a fake directory (mount), so that you can use all your preferred tools to copy or move things: cp, mv, rm, rsync, unison... The scp command would only be able to copy files. – Yvan Oct 19 '16 at 05:38
Note:
[1] If get error Transport endpoint is not connected after ctrl+c cancel and retry, then simply do fusermount -u /home/user/test, ref: https://stackoverflow.com/a/29400722/1074998

[2] In case you already in the mount directory, you may need to cd .. and re-enter the directory after mount to see the files.
– 林果皞 Jan 04 '18 at 09:15
comment to myself: if umount doesn't work: umount -f – Duda Oct 14 '21 at 15:04
Adding "fuse" to a system is not something I would do without thinking trough. It's quiet a big dependency to just copy files from a server. – gagarine Mar 23 '22 at 13:19
If you need to use a private key to connect to the remote server this answer can help https://unix.stackexchange.com/a/61571/393137 – masat Nov 03 '22 at 18:11

score 81 · Answer 3 · answered Dec 24 '13 at 15:17

81

Sometimes you need to get fancy with tar:

tar -C / -cf - \
  opt/widget etc/widget etc/cron.d/widget etc/init.d/widget \
  --exclude=opt/widget/local.conf | 
  ssh otherhost tar -C / -xvf -

answered Dec 24 '13 at 15:17

Dan Garthwaite

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Can you tell us what this does? For example I have no idea what 'cron' has to do with copying file! – aliqandil Oct 28 '16 at 15:00
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@aliqandil opt/widget etc/widget etc/cron.d/widget etc/init.d/widget are individual files to be included in the tar archive. The point was to illustrate why sometimes you need to get fancy.
This series of commands streams the tar archive over an ssh connection and unarchives it on the other side. Thus no tar archive is ever written to disk. I use this sometimes to cherry pick files to copy in one command.
– Dan Garthwaite Oct 28 '16 at 18:51
Ow! I taught the first '/' was the source path! (What is it?) So that was a silly question! Thanks. :) – aliqandil Oct 28 '16 at 21:01
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Tar will chdir to "/" thus all the following paths are relative to "/". – Dan Garthwaite Oct 29 '16 at 14:27
1

This is awesome. Can confirm that this also works with Azure CLI's ssh extension https://docs.microsoft.com/en-us/cli/azure/ssh?view=azure-cli-latest#az-ssh-vm – Jujhar Singh Feb 17 '22 at 15:45

score 48 · Answer 4 · answered Feb 06 '21 at 20:13

48

If they are running SCP / SSH on a different port, make sure you specify the uppercase -P port option.

Example:

scp -P 7121 /users/admin/downloads/* root@155.138.150.12:/home/

answered Feb 06 '21 at 20:13

Carter

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This question is seven years old and has many answers already. While it is true that ssh can use non-default ports and the ssh client's -P option is then required, you don't really help with the problem at hand. Try focusing on recent questions. – berndbausch Feb 07 '21 at 01:39
1

Yeah, it's unintuitive both because of the placement and letter size (with ssh its lower case). – mirekphd Sep 11 '23 at 18:59

score 37 · Answer 5 · edited Oct 15 '15 at 08:32

37

If you want to keep the files on both systems in sync then have a look at the rsync program:

(see tutorial here)

edited Oct 15 '15 at 08:32

Mathieu Rodic

103

answered Dec 24 '13 at 21:30

Kiffin

468

score 26 · Answer 6 · edited Mar 01 '21 at 14:12

26

A simpler method that works with via SSH controlled NVIDIA Jetson computers is to connect with SFTP (SSH File Transfer Protocol).

Suppose I wish to move the document UFO_blueprint.odt from NASA's remote servers and move it into my Documents.

cd to where you want the file saved
```
$ cd Documents
```

Connect

$ sftp sammy@your_server_ip_or_remote_hostname

Go the directory that contains the file to be transferred.
```
$ cd NASA/secret_files/
```
Transfer
```
$ get UFO_blueprint.odt
```

To get the complete directory, instead use

$ get -r secret_files/

edited Mar 01 '21 at 14:12

AdminBee

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answered Oct 01 '20 at 03:53

Pe Dro

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use put command for uploading files – Ilya Serbis Nov 18 '20 at 21:45
1

this was the easiest way – Diana Feb 06 '24 at 02:24

score 14 · Answer 7 · edited Nov 09 '20 at 14:59

Unix/Linux recursive copy of files and folders over a secure shell using the code following:

scp -r <host@machine_name:from_remote_directory_path> <to_local_directory_path>

A full example might look like:

scp -r sizwe@hprobook:./home/sizwe/PycharmProjects ./home/immaculate/OtherPycharmProjects

Note if you do not have a DNS server to resolve hostnames, use your IP address instead. The example above might look like this

scp -r 192.168.43.167:./home/sizwe/PycharmProjects ./home/immaculate/OtherPycharmProjects

score 8 · Answer 8 · answered Apr 28 '21 at 07:14

If speed (and not security) is your priority, then check out netcat. Before I start, let me warn you that this should be used only in a trusted network because netcat transfers are not encrypted.

First, on the receiving side, run this:

nc -lp 22222 >FileName

Then on the sending side:

nc -w3 <receiver IP or hostname> 22222 <FileName

Notes:

-l: Listen mode
-p: Port number to listen on (I picked an arbitrary port)
-w: Connect timeout

sylvansab · Answer 9 · 2024-10-22T01:05:55.813

7

ssh user@domain "printf 'dir' | pax -w " | pax -r

Use it instead of scp. Pax standardized 1 by IEEE, and scp deprecated by lwn[2] usersg.

1 https://man.bsd.lv/pax.1#STANDARDS [2] https://lwn.net/Articles/835962/

From someone else on "the CLI-way" ;-)

edited Oct 22 '24 at 01:05

answered Mar 01 '21 at 13:50

sylvansab

119

1

Good example of copy-from-remote instead of copy-to-remote, and will also work with the other archive programs like tar. – Samveen Aug 02 '23 at 10:56
bash: pax: command not found
on a Docker container. Maybe not so de-facto standard yet.
– Nay May 01 '24 at 18:54

score 6 · Answer 10 · answered Aug 04 '20 at 19:09

If you have one of the common OSes, you can install pigz that is the same as gzip except that it will use multiple cores and be quicker over a fast network. My command is a bit different.

tar cf - -C /opt -S <dir> | pigz | ssh <target> "pigz -d | tar xf - -C /opt -S"

or the other way to get files

ssh <target> "tar cf - -C /opt -S <dir> | pigz" | pigz -d | tar xf - -C /opt -S

or backup the root fs with

ssh <target> "tar cf - -C / --one-file-system -S --numeric-owner . | pigz" > root.tgz

And you can use ssh -J to go through a proxy server – Pablo A Sep 18 '20 at 20:59 — Pablo A, Sep 18 '20 at 20:59

score 6 · Answer 11 · answered Dec 25 '22 at 03:06

Many of the answers suggest scp, but it has since been deprecated in OpenSSH 8.0 on April 17th, 2019.

Assuming a file in the directory /usr/home/risner called records.dat, you copy the file using sftp:

sftp username@host:/path/

You will see:

Changing to: /path/.
sftp>

Copy a file from your local machine to the destination with:

put /usr/home/risner/records.dat

Download a file from the remote machine with:

get records.dat /usr/home/risner

You can run it non-interactively by setting up password-less authentication and calling it this way:

echo "put /usr/home/risner/records.dat" | sftp username@host:/path/

score 4 · Answer 12 · answered Jun 06 '23 at 16:19

If you copy and you need the public key authentication you can use the -o or the -i flag and if you have set a port use -P

scp -i /path/keyfile -P 2000 /path/FileToCopy USER@SERVER:/DestinationPath/

scp -o IdentityFile="/path/keyfile" -P 2000 /path/FileToCopy USER@SERVER:/DestinationPath/

Other options/possibilities:

Newer versions of scp have the option -3

-3 Copies between two remote hosts are transferred through the local host. Without this option the data is copied directly between the two remote hosts

scp between two servers not in the same network

Secure copy over two IPs on the same network to the local machine

Use scp to copy a file to different servers

score 4 · Answer 13 · answered Nov 23 '23 at 13:39

4

For a single file, if ssh can run non-interactively (see ssh-copy-id for example) you can use the following command:

cat file1 | ssh remotehost 'cat > file2'

answered Nov 23 '23 at 13:39

Özgür Murat Sağdıçoğlu

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How to copy files from one machine to another using ssh

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