Automatically backup server data to local windows

Keywords: Linux Windows Operation & Maintenance

Application scenario

Recently, there is a requirement that after the server executes an instruction, it needs to back up the generated data to windows. It's not easy to check on the Internet. Some need to write a script to run in windows, but this application does not need windows operation. Instead, it monitors the operation of the server and backs up directly after executing an instruction.

Configure the ssh service on the server

This general server has been configured. If it is not configured, you can refer to it How to configure and install SSH service under Linux system - system operation and maintenance - Yisu cloud ( Method configuration on

After the configuration is completed, enter SSH keygen and enter all the way. When y/n is encountered, yes will be displayed. The following description is OK.

fred@fred-VirtualBox:~/ssc338_v20211022$ ssh-keygen
Generating public/private rsa key pair.
Enter file in which to save the key (/home/fred/.ssh/id_rsa): 
/home/fred/.ssh/id_rsa already exists.
Overwrite (y/n)? y
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved in /home/fred/.ssh/id_rsa.
Your public key has been saved in /home/fred/.ssh/
The key fingerprint is:
SHA256:zpoJ5k3HizzF8qpW8z7kdU8vPp2QIItTBMbTQwk9wYE fred@fred-VirtualBox
The key's randomart image is:
+---[RSA 2048]----+
|      .+O++      |
|      .E O       |
|        o o      |
|         o .     |
|       .S o . .  |
|      +*+.. .o.  |
|    o..O*. . o.o.|
|   o.=.*=.    +.o|
|   .o.O+o.   ..o |

Start ssh service in Windows 10

reference resources Install OpenSSH | Microsoft Docs Follow the instructions in to install and start the ssh service directly.

It should be noted that it is not enough to enter SSH in power shell to display the following contents. The following display shows that the computer has installed SSH client, so you need to install ssh server according to the above documents, because my application sends files from the server to Windows, so Windows is equivalent to the server at this time.

PS C:\Users\Fred> ssh
usage: ssh [-46AaCfGgKkMNnqsTtVvXxYy] [-B bind_interface]
           [-b bind_address] [-c cipher_spec] [-D [bind_address:]port]
           [-E log_file] [-e escape_char] [-F configfile] [-I pkcs11]
           [-i identity_file] [-J [user@]host[:port]] [-L address]
           [-l login_name] [-m mac_spec] [-O ctl_cmd] [-o option] [-p port]
           [-Q query_option] [-R address] [-S ctl_path] [-W host:port]
           [-w local_tun[:remote_tun]] destination [command]


The above two have installed and started the ssh services on the server and Windows normally. After a long time, you can test whether the ssh connection is normal. The following attempts are to use the IP of Linux is and the IP of local Windows is

Connecting linux via ssh on Windows

PS C:\Users\Fred> ssh fred@
The authenticity of host ' (' can't be established.
ECDSA key fingerprint is SHA256:shuor6LIVUODc9LBkBQI3tzlnnJFJ+WJ/KM/Rw0GwPc.
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added '' (ECDSA) to the list of known hosts.
fred@'s password:
Welcome to Ubuntu 18.04.5 LTS (GNU/Linux 5.4.0-89-generic x86_64)

 * Documentation:
 * Management:
 * Support:

 * Canonical Livepatch is available for installation.
   - Reduce system reboots and improve kernel security. Activate at:

32 updates can be applied immediately.
1 of these updates is a standard security update.
To see these additional updates run: apt list --upgradable

New release '20.04.3 LTS' available.
Run 'do-release-upgrade' to upgrade to it.

Your Hardware Enablement Stack (HWE) is supported until April 2023.
Last login: Thu Aug 12 11:01:13 2021 from

Similar to the above display, it indicates that Windows is connected to Linux normally

Connect windows on the server

fred@fred-VirtualBox:~/ssc338_v20211022$ ssh Fred@
Fred@'s password: 

Microsoft Windows [Version 10.0.19042.1288]
(c) Microsoft Corporation. All rights reserved.

fred@DESKTOP-4B5T15G C:\Users\Fred>dir
 Driver C The volume in is OS
 The serial number of the volume is 0 A73-4233

 C:\Users\Fred Directory of

2021/10/22  20:04    <DIR>          .
2021/10/22  20:04    <DIR>          ..
2021/09/07  fourteen:14    <DIR>          .android
2021/06/02  09:25               888 .viminfo
2021/10/22  18:51    <DIR>          .VirtualBox
2021/04/29  09:23    <DIR>          .vscode
2021/09/15  11:34    <DIR>          .xmos
2021/04/21  14:00    <DIR>          3D Objects
2021/04/21  13:58    <DIR>          AppData
2021/08/27  16:42               143 authority_ctrl_user.csv
2021/04/21  14:00    <DIR>          Contacts
2021/10/22  17:18    <DIR>          Desktop
2021/09/23  19:41    <DIR>          Documents
2021/08/10  17:07    <DIR>          esp
2021/04/21  14:00    <DIR>          Favorites
2021/04/21  14:00    <DIR>          Links
2021/09/14  11:30    <DIR>          Music
2021/04/21  15:02    <DIR>          OneDrive
2021/06/16  09:46    <DIR>          Pictures
2021/04/21  14:00    <DIR>          Saved Games
2021/04/25  13:48    <DIR>          Searches
2021/09/14  10:40    <DIR>          usb_driver
2021/05/08  18:52    <DIR>          Videos
               5 Files         14,091 byte
              33 Directories 71,653,093,376 Available bytes

fred@DESKTOP-4B5T15G C:\Users\Fred>

As shown in the above figure, the test shows that the connection between Linux and windows is normal, and the ssh service of windows is normal. At this time, you can test the file transfer function

fred@fred-VirtualBox:~/ssc338_v20211022$ scp Fred@
Fred@'s password:                                                                     100% 1978     4.6MB/s   00:00    

After entering the above command, it means OK to find the file in the specified location of Windows. Note that when writing the path of Windows, use / can't use \, otherwise it will be copied to Disk C, and the file name will be changed to a pile of string superposition

-a----        2021/10/22     20:37           1978 UsersFredDocumentsDownloads

SSH pass solves the problem of entering a password when canceling scp input

  1. Installing sshpass

    sudo apt install sshpass

  2. Transfer files through sshpass

    sshpass -p 123456 scp Fred@

    The parameter - p is followed by the password

After all the above operations are completed, you can detect an instruction in the script, and then add the transmission instruction.

Posted by Absorbator on Fri, 22 Oct 2021 05:13:43 -0700