Windows10 github ssh setting

Introduce | 導入

I will explain the initial setting of Github and the management method using ssh.

This tutorial will explain the initial settings after registering an account.

I will describe the terminal used this time. Reproducibility may be improved by using the same terminal.

Tools for USE | 使った道具


Microsoft Surface Laptop 3 – 13.5

New Microsoft Surface Laptop 3 – 15

NEW Microsoft Surface Pro X – 13


マイクロソフト Surface Laptop 3 13.5インチ

マイクロソフト Surface Laptop 3 15インチ

マイクロソフト Surface Pro X

Git settings|ギットハブの設定

From here you can configure the Github.

Visit Github and log in

If you don't have a Github account, I'd be very happy if you could create one (I'm not saying, just thinking

Create an account and log in

Click the icon in the upper right

Click on settings

Click Click SSH and GPG keys

Click New SSH key

Once you have reached this point, set up Windows while keeping this status.

Install VScode|Install VScode をインストール

Open an internet browser, copy and paste the URL, and download the zip file.

Visual studio code zip download

Unzip the downloaded zip file

Double-click Code.exe in the unzipped file to execute

Click on terminal

Click New Terminal

Confirm that it is a power shell

Enter choco install git in powershell and enter

Do you want to run ~ enter y and Enter

After install, Click Powershell

Click Select Default Shell

Click Git Bash

Close the VS code and reopen it.

The VS code terminal has been changed to Gitbash.

Create an SSH key from here.


Githubでは Secure Shell(セキュアシェル、SSH)を使ってファイル管理を行います。それに伴い暗号化キーの作成を行います。

Create random keyword (optional)|ランダムキーワードを作成 (任意)

Security can be strengthened by outputting a random keyword and using it as an encryption key. This is handy if you're wondering what your password is.

For bash

cat /dev/urandom | tr -dc 'a-zA-Z0-9!@#$%^&*()_+?><~\;' | fold -w 16 | head -n 1


Outputs a code consisting of 32 lowercase letters and numbers

cat /dev/urandom | tr -dc 'a-z0-9' | fold -w 32 | head -n 1

Outputs a code consisting of 20 lowercase letters, uppercase letters, and numbers

cat /dev/urandom | tr -dc 'a-zA-Z0-9' | fold -w 20 | head -n 1

Outputs code of 16 lowercase letters and uppercase letters, numbers, and symbols

cat /dev/urandom | tr -dc 'a-zA-Z0-9!@#$%^&*()_+?><~\;' | fold -w 16 | head -n 1

/SU7Ilh4xM8bav27 It will come out. If you have any problems with Passphrase, it is easy to output Passphrase by the above method. Be sure to write down passwords.

Check if .ssh folder exists|.ssh フォルダが存在するか確認


Just cd and press [Enter] to return to the document root.

cd .ssh

Type cd .ssh to run

If you return bash: cd: .ssh: no such file or directory, the file does not exist on your PC.

type mkdir .ssh and enter

type cd .ssh and enter

ed25519方式を使った 暗号化キーの作成

What is the ed25519 encryption key

If you create an encryption key, it is logically possible for an outsider to A way to make it impossible to crack or hack.

There is only a tutorial that uses rsa method for the encryption method using ssh in the upper search on Google, but ed25519 cipher What is the activation key? is more reasonable. Nonetheless, almost all the contents of the tutorial that came out hit only the explanation in the rsa method.

Very irrational in terms of knowledge optimization and rationalization. Do not blindly believe the Google search results in Japanese

Even with the rsa method, the encryption strength is high, so there is almost no current situation where it is cracked from the outside (except if quantum computers start to spread).


ssh-keygen -t ed25519 -C github -b 4096

Generating public/private ed25519 key pair. Enter file in which to save the key (/home//.ssh/id_ed25519):

Will appear



githubの暗号化keyだと分かる用に名前の最後に _githubを組み込み id_ed25519_github という名前で作成

Enter passphrase (empty for no passphrase):

Enter Passwords to connect to Github with ssh

Enter same passphrase again:

Enter Passwords again to connect to Github with ssh

Your identification has been saved in id_ed25519_github.
Your public key has been saved in
The key fingerprint is:
SHA256:y21F/V6levwIbF5SSoOWyzUasJ6j+3qTSGlFgAejdYs github
The key's randomart image is:
+--[ED25519 256]--+
|    +oo.         |
|   o.+...    .   |
|  . E....   . . .|
|        .o +   o.|
|       oS = * o o|
|      +o * O B ..|
|     o .*.* B + .|
|      ..+o o = o |
|      +=..  . . .|

If it is output, it is successful.

What is the last written AA ([Ascii Art] ( If another person changes the encryption key, this figure (AA) changes It is a function to make it easier to notice the change.




If it is output, it is successful.

The public key with the .pub extension is to be registered with the service to which you want to connect with SSH, such as GitHub. During SSH communication, the private key at hand is compared with the public key registered in the communication destination, and authentication succeeds. As a result, only you, who has the private key, are allowed to communicate.


Output encryption key

ssh-ed25519 AAAAAAAAAAAA1JIoEFCNT7h/07Nza8xHy8jloKg621lZDI1Q7TmerS5tE5IMgkDLVdSB github

Copy the output code from ssh ~ github

ギットハブSSH pass 設定|Git hub SSH pass setting key

Go back to the Github site that you had put on hold

Detailed explanation of ssh-keygen|ssh-keygen の細かい解説

-t | Specify the encryption method. Specify the ed25519 encryption method with -t ed25519 and the rsa method with-t rsa

-C | Enter a comment Make it easier to understand by commenting with -C this_is_githubssh !!! etc.

-b | Specify the encryption key length. The default is 2048. If you specify -b 4096 etc., it will be hard to crack

-N | Specify password

ssh encryption key sample|ssh暗号化キーのサンプル

ssh-keygen -t ed25519 -C github -f /home/user/.ssh/id_ed25519_github -N passwordsdayo! -b 4096

In the sample of ↑

Select ed25519 encryption method with -t ed25519   Comment with github on -C github Output with -f /home/user/.ssh/id_ed25519_github with the file nameid_ed25519_github in the /home/user/.ssh/ hierarchy Specify passwords as passwordsdayo! With -N passwordsdayo! Specify cipher length of 4096bit with -b 4096

If you remember even the above shortcuts, I think that there is no problem in using it normally.

Register the created on Github|作った をGithubに登録

Paste the passphrase you copied earlier into the key

Paste the passphrase you copied earlier into the key

Title win-ssh-github Key <your code output in cat>

Enter a descriptive name for the title local-ssh-github I think it is safe.

Edit SSH config file|SSHのconfigファイルを編集

The purpose is to manage which private key is specified when connecting to GitHub via SSH. For example, if you previously created an ed25519 encrypted Key to connect to a VPS, you will not be able to access existing files. So create a config file inside .ssh to manage ssh connection

nano ~/.ssh/config

Enter the code and enter

I'm using a safe nano as an editor, but any favorite easy-to-use editor is fine

Host git
  User git
  IdentityFile ~/.ssh/id_ed25519_github

Write the code shown

After writing, save with Ctrl + s

Exit nano with Ctrl + x

cat ~/.ssh /config to check if writing is successful


Host git Specify the character string to execute the command with. With the above contents, the following statement is executed by executing ssh git.

Host tadokorokoji

When set to ssh tadokorokoji, the following statement is executed.


This is fixed at Specifying HostName.

User git This is also fixed with User git.

IdentityFile ~/.ssh /id_ed25519_github This specifies the private key. In the above contents, id_ed25519_github in the .ssh hierarchy is specified.

ssh git で接続

Type ssh git and enter

The authenticity of host ' (' can't be established.
RSA key fingerprint is SHA256:nThdCARLviKw6E5SY8XUpJbg6kGOCsl7E1IpRomTxWG.
Are you sure you want to continue connecting (yes/no/[fingerprint])?

Type yes and enter

Warning: Permanently added ',' (RSA) to the list of known hosts. Enter passphrase for key '/home/user/.ssh/id_ed25519_github':

Enter the password you set when you created id_ed25519_github

PTY allocation request failed on channel 0 Hi ! You've successfully authenticated, but GitHub does not provide shell access. Connection to closed.

If it comes out, it is successful.

Tools for USE | 使った道具


Microsoft Surface Laptop 3 – 13.5

New Microsoft Surface Laptop 3 – 15

NEW Microsoft Surface Pro X – 13


マイクロソフト Surface Laptop 3 13.5インチ

マイクロソフト Surface Laptop 3 15インチ

マイクロソフト Surface Pro X

Thank you I'm glad if you can use it as a reference. Thank you for watching until the end.

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thank you

Thank you for watching until the end. I'm glad if you can use it as a reference.

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