What to do when you want to receive files from a Windows client remotely

What is written

Causes and countermeasures when Permission denied (public key) is said when trying to throw a file from Teraterm on Windows from the remote side to the client side with scp.

Conclusion

What is Permission denied (public key) in the first place?

Permission Denied means that the server is denying the connection for some reason. There seems to be a problem with the public key. However, there seem to be various causes for this error.

Use SCP function of Teraterm itself instead of command

tera_scp_01.jpg

In the first place, Windows OS itself does not have an SCP client like Linux with the same settings, so it seems that it can be handled by using Teraterm's SCP client separately as described above. It seems that the authentication information used when logging in is used as it is.

Use Windows 10 OpenSSH

However, since it seems that there is an OpenSSH client in Windows 10, it is possible to set the Windows standard SSH client, but there is a possibility that it can still be done (I have not tried) The setting method is easy to understand by @ szly, so the following Described in

If the authority of the file you want to send or the authority of the owner is strong, change it with chmod or chown

Symptoms

image.png

Although it can be used for sending a normal text file, I made an authentication key for the client with EasyRSA etc., so when I try to send it to the client, Teraterm's file sending function does not work.

Cause

Looking at the status of the file you want to send with ls -l, it seems that the authority is root.

-rw------- 1 root     root        1696 Jan 27 11:38 authorization.pem

solution

You can send it by changing the authority or administrator so that it can be used even with the authority of the user who logged in with SSH first. Specifically, the permission (authority) is changed with chmod, and the administrator is changed with chown.

1. When supporting with chmod

Let's think about how to deal with the above case. Since root has both user groups, you can call it by setting chmod so that other users can read it.

Refer to the vote below and give 4 to the authority for other users.

symbol Numerical value Corresponding authority
r 4 Readable
w 2 Writable
x 1 Feasible
- 0 No authority
sudo chmod 604 authorization.pem

It is now available for download.

2. When supporting with chown

chown is a command to change the owning user group. At login-user: login-user, you can specify users, groups, and so on. This time I will change both.

sudo chown login-user:login-user authorization.pem

After this, if you send with Teraterm, you can send successfully.

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