###### tags: `github` `ssh` `linux` # Github SSH Key (make linux easy to push github rapo.) > This page is edited from [Auther: 辛西 (Cynthia)【Git】使用 SSH 金鑰與 GitHub 連線 ](https://cynthiachuang.github.io/Generating-a-Ssh-Key-and-Adding-It-to-the-Github/) 1. Make a local ssh dir in linux ```shell mkdir ~/.ssh chmod 700 ~/.ssh ``` 2. Use Git RSA Generator to make rsa ssh key (private & public keys) ```shell ssh-keygen -t rsa -b 4096 -C "your_email@example.com" ``` * You will be ask some question: 1. :::info Enter file in which to save the key (/home/kuihao-ubuntu/.ssh/id_rsa): ::: Give these rsa keys file a name. **You can pass by enter directly.** Or input a good name. E.g.: :::success github_rsa_key ::: 2. :::info Enter passphrase (empty for no passphrase): ::: The second and third questions ask whether to specify the key protection password. If you set the password, you have to enter the password every time you use the key afterwards. Please keep this in mind. **You can pass by enter directly.** Or input a good password. E.g.: :::success password ::: 3. :::info Enter same passphrase again: ::: Input the same thing as last answer. :::success password ::: 3. Then you will get your fingerprint and SHA256 token :::info The key fingerprint is: SHA256: \<sha-token\> your_email@example.com The key's randomart image is: +---[RSA 4096]----+ | ...&emsp;...&emsp;... | | ...&emsp;...&emsp;... | | ...&emsp;...&emsp;... | | ...&emsp;...&emsp;... | | ...&emsp;...&emsp;... | | ...&emsp;...&emsp;... | | ...&emsp;...&emsp;... | | ...&emsp;...&emsp;... | | ...&emsp;...&emsp;... | +----[SHA256]-----+ ::: 4. Check and copy your the public key ```shell cd ~/.ssh && ls ``` :::info github_rsa_key github_rsa_key.pub ::: ```shell cat ~/.ssh/github_rsa_key.pub ``` :::info ssh-rsa ABC....89xyz== your_email@example.com ::: > If you want to copy with command line: [xclip](https://hackmd.io/kSwf6CSkRHeAl1Eu1Jj2WQ#%E5%89%AA%E8%B2%BC%E7%B0%BF%E5%A5%97%E4%BB%B6-xclip) 5. Add a public key to your remote repository https://github.com/ $\rightarrow$ `Settings` $\rightarrow$ Access $\rightarrow$ `SSH and GPG keys` $\rightarrow$ SSH keys $\rightarrow$ `New SSH keys` * Name a good title E.g.: :::success MyLabDesktopUbuntu2004 ::: * paste the public key :::success ssh-rsa ABC....89xyz== your_email@example.com ::: 6. Test it Just paste the command below: ```SHELL ssh -T git@github.com ``` You should see: :::info ECDSA key fingerprint is SHA256:\*\*\*\*\*\*\*\*\*\*\*\* Are you sure you want to continue connecting (yes/no/\[fingerprint\])? ::: input `yes` then: :::info Warning: Permanently added 'github.com,52.69.186.44' (ECDSA) to the list of known hosts. ::: :::info Hi XXX! You've successfully authenticated, but GitHub does not provide shell access. ::: Means successfully finish. * Troubleshooting: https://cynthiachuang.github.io/Generating-a-Ssh-Key-and-Adding-It-to-the-Github/ 7. ==Change the connection protocol== After completing the key generation and configuration, you must change the connection protocol; otherwise, even if SSH is configured, it will still use the https transmission protocol. In the local git dir: ```shell git remote -v ``` You'll see: :::info origin https://github.com/YourGithubUserName/YourGithubRepo.git (fetch) origin https://github.com/YourGithubUserName/YourGithubRepo.git (push) ::: **Changing Remote Server Repository URLs** Github uses different server repository URLs for different protocols. So the URL will be changed from https to start with git ```shell git remote set-url origin git@github.com:YourGithubUserName/YourGithubRepo.git ``` * Change these two strings in the command: * YourGithubUserName * YourGithubRepo To see the change: ```shell git remote -v ``` You should see: :::info origin git@github.com:YourGithubUserName/YourGithubRepo.git (fetch) origin git@github.com:YourGithubUserName/YourGithubRepo.git (push) ::: 8. That's all. You can push your commit to github without input the personal access token. ==**NOTICE!!**== :::danger **This article continues [Cynthia's blog](https://cynthiachuang.github.io/Generating-a-Ssh-Key-and-Adding-It-to-the-Github/) under the [CC BY-NC-SA 4.0 license](https://creativecommons.org/licenses/by-nc-sa/4.0/deed.en). Please cite author, link and source for republication!** ::: ## normal use ([ref.](https://medium.com/feveral%E7%9A%84%E7%A8%8B%E5%BC%8F%E7%AD%86%E8%A8%98/%E7%94%A8%E6%86%91%E8%AD%89%E8%AE%93ssh%E9%81%A0%E7%AB%AF%E9%80%A3%E7%B7%9A%E4%B8%8D%E7%94%A8%E6%89%93%E5%AF%86%E7%A2%BC-3d187cd9f354)) ``` scp ~/.ssh/<your_local_key_name>.pub <remote-user>@140.116.xxx.yyy:~/.ssh/<xyz_key>.pub ``` - <xyz_key>.pub 可改成自己想要的檔名.pub 以下命令要在遠端主機： ``` cat ~/.ssh/<xyz_key>.pub >> ~/.ssh/authorized_keys ``` ``` sudo chmod 400 ~/.ssh/authorized_keys ``` ``` sudo service ssh restart ``` finished