# mutli_ssh_config

**Repository Path**: jiodg45/mutli_ssh_test

## Basic Information

- **Project Name**: mutli_ssh_config
- **Description**: No description available
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2019-12-14
- **Last Updated**: 2021-09-12

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README


## SSH
1. 怎样使用ssh配置多个ssh密钥,首先打开终端,检查`ssh-keygen`是否有安装,Mac系统自带,然后查看其帮助命令。ssh help:
```
usage: ssh-keygen [-q] [-b bits] [-t dsa | ecdsa | ed25519 | rsa]
[-N new_passphrase] [-C comment] [-f output_keyfile]
ssh-keygen -p [-P old_passphrase] [-N new_passphrase] [-f keyfile]
ssh-keygen -i [-m key_format] [-f input_keyfile]
ssh-keygen -e [-m key_format] [-f input_keyfile]
ssh-keygen -y [-f input_keyfile]
ssh-keygen -c [-P passphrase] [-C comment] [-f keyfile]
ssh-keygen -l [-v] [-E fingerprint_hash] [-f input_keyfile]
ssh-keygen -B [-f input_keyfile]
ssh-keygen -D pkcs11
ssh-keygen -F hostname [-f known_hosts_file] [-l]
ssh-keygen -H [-f known_hosts_file]
ssh-keygen -R hostname [-f known_hosts_file]
ssh-keygen -r hostname [-f input_keyfile] [-g]
ssh-keygen -G output_file [-v] [-b bits] [-M memory] [-S start_point]
ssh-keygen -T output_file -f input_file [-v] [-a rounds] [-J num_lines]
[-j start_line] [-K checkpt] [-W generator]
ssh-keygen -s ca_key -I certificate_identity [-h] [-U]
[-D pkcs11_provider] [-n principals] [-O option]
[-V validity_interval] [-z serial_number] file ...
ssh-keygen -L [-f input_keyfile]
ssh-keygen -A
ssh-keygen -k -f krl_file [-u] [-s ca_public] [-z version_number]
file ...
ssh-keygen -Q -f krl_file file ...
```
- 这里重点需要注意 `-t`指定ssh的密钥类型,一般选rsa(非对称加密)
- `-C`对密钥加上自己的备注
- `-f`指定`known_hosts_file`.
2. 生成ssh密钥并在同目录下面
```shell
ssh-keygen -t rsa -f ~/.ssh/id_rsa.github -C "zhangkui305@163.com"
ssh-keygen -t rsa -f ~/.ssh/id_rsa.gitlab -C "zhangkui305@163.com"
```
3. 以其中一个ssh密钥生成记录来看,终端会为我们生成如下文件,下面log记录了
- `public key`和`private key`的生成目录
- `fingerprint`指纹签名
- RSA密钥长度位数为2048位.也可以通过`-b`参数指定,为1024的倍数。
```terminal
Generating public/private rsa key pair.
Enter passphrase (empty for no passphrase): 
Enter same passphrase again: 
Your identification has been saved in /Users/longxiang/.ssh/id_rsa.github.
Your public key has been saved in /Users/longxiang/.ssh/id_rsa.github.pub.
The key fingerprint is:
SHA256:ocviE32+0q4aDMpT7BV+Lbog02K0Xm7WVBjj2IkhBrE zhangkui305@163.com
The key's randomart image is:
+---[RSA 2048]----+
|+.               |
| + . o           |
|E . *.= .        |
|  .o.=.o..       |
| ..o +ooS.       |
|o.=ooo+.o        |
|.O =*oo+         |
|o B+o+o o        |
| .o.o+.+o.       |
+----[SHA256]-----+
```
2. 然后进入到`./ssh/`目录可以看到我们刚才创建的2个密钥:
```tree
├── id_rsa.github
├── id_rsa.github.pub
├── id_rsa.gitlab
├── id_rsa.gitlab.pub
```
3. 在此目录下心间config文件,内容如下:
```tree
#github
Host github
Hostname github.com
user user@github.com
IdentityFile ~/.ssh/id_rsa.github
#gitlab
Host gitlab
Hostname gitlab.com
user user@gitlab.com
IdentityFile ~/.ssh/id_rsa.gitlab
#gitee 
Host gitee
Hostname gitee.com
user user@gitee.com
IdentityFile ~/.ssh/id_rsa.gitee
```
4. 添加私钥匙
```
ssh-add ~/.ssh/id_rsa.github
```
5. 将对应的pub密钥贴到你的`git账号仓库的sshkeys中`,激活ssh密钥
```
ssh -T git@gitee.com
The authenticity of host 'gitee.com (212.64.62.174)' can't be established.
ECDSA key fingerprint is SHA256:FQGC9Kn/eye1W8icdBgrQp+KkGYoFgbVr17bmjey0Wc.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added 'gitee.com,212.64.62.174' (ECDSA) to the list of known hosts.
Hi 逐风! You've successfully authenticated, but GITEE.COM does not provide shell access.
```
- 同时`.ssh`目录下面也会生成一个`known_hosts`它记录远程domain的链接信息。

6. 然后就可以愉快的获取对应仓库的代码了。
```
git clone git@gitee.com:jiodg45/mutli_ssh_test.git
```



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