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这是一个创建于 771 天前的主题，其中的信息可能已经有所发展或是发生改变。

问题描述

当创建两个不同的 ssh key 来设置两个 Github 账号时, 我发现它们不能同时通过 Github 的认证, 只有一个可以与 Github 连接, 并克隆仓库. 我查找了网上不少有关配置多个账号和多个 SSH Key 的资料, 依然没有解决这个问题.
以前用 Ubuntu20.4 时配置成功过, 改用 Fedora36 后就一直没解决这个问题, 故来请教一下大家.

运行环境

OS: Fedora Linux 36 (Workstation Edition) x86_64
Kernel: 5.19.14-200.fc36.x86_64
OpenSSH: OpenSSH_8.8p1, OpenSSL 3.0.5 5 Jul 2022
Git: git version 2.37.3

问题复现

删除 $HOME/.ssh/ 文件夹, 清除代理

$ rm -r $HOME/.ssh/
$ ssh-add -D && ssh-add -l

新建两个 SSH Key, (以 com 和 net 为例):

$ ssh-keygen -t rsa -C "[email protected]" -f $HOME/.ssh/id_rsa_com
$ ssh-keygen -t rsa -C "[email protected]" -f $HOME/.ssh/id_rsa_net

编辑 $HOME/.ssh/config 添加以下内容:

Host com
    HostName        github.com
    User            git
    IdentityFile    $HOME/.ssh/id_rsa_com
    ProxyCommand    ncat --proxy 127.0.0.1:1089 --proxy-type socks5 %h %p

Host net
    HostName        github.com
    User            git
    IdentityFile    $HOME/.ssh/id_rsa_net
    ProxyCommand    ncat --proxy 127.0.0.1:1089 --proxy-type socks5 %h %p

添加公钥到对应的 Github 账户
测试服务器连通性:
- 运行 ssh -T git@com 回车后询问是否继续, 输入 yes 后继续, 提示 com 的账号成功通过身份验证.
- 运行 ssh -T git@net 回车后, 提示 com 的账号成功通过身份验证.
使用 Git 克隆不同账号的私有仓库:
- 运行 git clone git@com:com_example/example.git 回车后, 克隆成功.
- 运行 git clone git@net:net_example/example.git 回车后, 克隆失败, 提示如下:

ERROR: Repository not found.
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.

10 条回复 • 2022-10-15 09:18:11 +08:00

2022-10-13 19:41:09 +08:00

没看到你把 key 重新添加啊？
ssh-add -k id_rsa_com
ssh-add -k id_rsa_net

2022-10-13 19:45:16 +08:00

net 不行，先添加 net ，然后再试下

corvofeng

2022-10-13 20:02:56 +08:00

你先把 com 的删掉, 看看能不能登录 net, 我怀疑你拷贝公钥的时候拷贝错了..

charlie21

2022-10-13 20:24:03 +08:00

用如下命令查看连接细节
ssh -Tv git@com
ssh -Tv git@net

为 Host 增加 IdentitiesOnly 如下，另一块同理
Host com
HostName github.com
User git
IdentityFile $HOME/.ssh/id_rsa_com
IdentitiesOnly yes
ProxyCommand ncat --proxy 127.0.0.1:1089 --proxy-type socks5 %h %p

参考
https://superuser.com/questions/268776/how-do-i-configure-ssh-so-it-doesnt-try-all-the-identity-files-automatically

Yiskiee

2022-10-14 11:57:37 +08:00

@ob
@corvofeng
@charlie21
为验证这些问题, 我将 id_rsa_com 和 id_rsa_net 分别移动到其他文件夹下.
将 config 文件中的所有内容注释, 删除 known_hosts 和 known_hosts.old
执行 ssh-add -D && ssh-add -l 确认没有内容后:
先移动 net 的 Key 后执行 ssh-add -k $HOME/.ssh/id_rsa_net
后移动 com 的 Key 后执行 ssh-add -k $HOME/.ssh/id_rsa_com
编辑 config 将 Host net 的内容移动到 Host com 之前, 其他只字未改.

执行 ssh -Tv git@net, 结果如下:
```
OpenSSH_8.8p1, OpenSSL 3.0.5 5 Jul 2022
debug1: Reading configuration data /home/umze/.ssh/config
debug1: /home/umze/.ssh/config line 2: Applying options for net
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Reading configuration data /etc/ssh/ssh_config.d/50-redhat.conf
debug1: Reading configuration data /etc/crypto-policies/back-ends/openssh.config
debug1: configuration requests final Match pass
debug1: re-parsing configuration
debug1: Reading configuration data /home/umze/.ssh/config
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Reading configuration data /etc/ssh/ssh_config.d/50-redhat.conf
debug1: Reading configuration data /etc/crypto-policies/back-ends/openssh.config
debug1: Executing proxy command: exec ncat --proxy 127.0.0.1:1089 --proxy-type socks5 github.com 22
debug1: identity file $HOME/.ssh/id_rsa_net type -1
debug1: identity file $HOME/.ssh/id_rsa_net-cert type -1
debug1: Local version string SSH-2.0-OpenSSH_8.8
debug1: Remote protocol version 2.0, remote software version babeld-f33ee42f
debug1: compat_banner: no match: babeld-f33ee42f
debug1: Authenticating to github.com:22 as 'git'
debug1: load_hostkeys: fopen /home/umze/.ssh/known_hosts: No such file or directory
debug1: load_hostkeys: fopen /home/umze/.ssh/known_hosts2: No such file or directory
debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts: No such file or directory
debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts2: No such file or directory
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: curve25519-sha256
debug1: kex: host key algorithm: ssh-ed25519
debug1: kex: server->client cipher: [email protected] MAC: <implicit> compression: none
debug1: kex: client->server cipher: [email protected] MAC: <implicit> compression: none
debug1: kex: curve25519-sha256 need=32 dh_need=32
debug1: kex: curve25519-sha256 need=32 dh_need=32
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: SSH2_MSG_KEX_ECDH_REPLY received
debug1: Server host key: ssh-ed25519 SHA256:+DiY3wvvV6TuJJhbpZisF/zLDA0zPMSvHdkr4UvCOqU
debug1: load_hostkeys: fopen /home/umze/.ssh/known_hosts: No such file or directory
debug1: load_hostkeys: fopen /home/umze/.ssh/known_hosts2: No such file or directory
debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts: No such file or directory
debug1: load_hostkeys: fopen /etc/ssh/ssh_known_hosts2: No such file or directory
debug1: hostkeys_find_by_key_hostfile: hostkeys file /home/umze/.ssh/known_hosts does not exist
debug1: hostkeys_find_by_key_hostfile: hostkeys file /home/umze/.ssh/known_hosts2 does not exist
debug1: hostkeys_find_by_key_hostfile: hostkeys file /etc/ssh/ssh_known_hosts does not exist
debug1: hostkeys_find_by_key_hostfile: hostkeys file /etc/ssh/ssh_known_hosts2 does not exist
The authenticity of host 'github.com (<no hostip for proxy command>)' can't be established.
ED25519 key fingerprint is SHA256:+DiY3wvvV6TuJJhbpZisF/zLDA0zPMSvHdkr4UvCOqU.
This key is not known by any other names
Are you sure you want to continue connecting (yes/no/[fingerprint])? yes
Warning: Permanently added 'github.com' (ED25519) to the list of known hosts.
debug1: rekey out after 4294967296 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: rekey in after 4294967296 blocks
debug1: Will attempt key: [email protected] RSA SHA256:eQ5AqN8Y+p9cGo8eVzcxOMmJgDN3ivpCbcgA7jkkXeI agent
debug1: Will attempt key: [email protected] RSA SHA256:H790emQkwtjDRSnGyRxp0e+HnlxlAY5ruEFLrxw6VtQ agent
debug1: Will attempt key: $HOME/.ssh/id_rsa_net explicit
debug1: SSH2_MSG_EXT_INFO received
debug1: kex_input_ext_info: server-sig-algs=<[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],ssh-ed25519,ecdsa-sha2-nistp521,ecdsa-sha2-nistp384,ecdsa-sha2-nistp256,rsa-sha2-512,rsa-sha2-256,ssh-rsa>
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Offering public key: [email protected] RSA SHA256:eQ5AqN8Y+p9cGo8eVzcxOMmJgDN3ivpCbcgA7jkkXeI agent
debug1: Server accepts key: [email protected] RSA SHA256:eQ5AqN8Y+p9cGo8eVzcxOMmJgDN3ivpCbcgA7jkkXeI agent
Authenticated to github.com (via proxy) using "publickey".
debug1: pkcs11_del_provider: called, provider_id = (null)
debug1: channel 0: new [client-session]
debug1: Entering interactive session.
debug1: pledge: filesystem full
debug1: client_input_global_request: rtype [email protected] want_reply 0
debug1: client_input_hostkeys: searching /home/umze/.ssh/known_hosts for github.com / (none)
debug1: client_input_hostkeys: searching /home/umze/.ssh/known_hosts2 for github.com / (none)
debug1: client_input_hostkeys: hostkeys file /home/umze/.ssh/known_hosts2 does not exist
debug1: Sending environment.
debug1: channel 0: setting env XMODIFIERS = "@im=ibus"
debug1: channel 0: setting env LANG = "en_US.UTF-8"
Learned new hostkey: RSA SHA256:nThbg6kXUpJWGl7E1IGOCspRomTxdCARLviKw6E5SY8
Learned new hostkey: ECDSA SHA256:p2QAMXNIC1TJYWeIOttrVc98/R1BUFWu3/LiyKgUfQM
Adding new key for github.com to /home/umze/.ssh/known_hosts: ssh-rsa SHA256:nThbg6kXUpJWGl7E1IGOCspRomTxdCARLviKw6E5SY8
Adding new key for github.com to /home/umze/.ssh/known_hosts: ecdsa-sha2-nistp256 SHA256:p2QAMXNIC1TJYWeIOttrVc98/R1BUFWu3/LiyKgUfQM
debug1: update_known_hosts: known hosts file /home/umze/.ssh/known_hosts2 does not exist
debug1: client_input_channel_req: channel 0 rtype exit-status reply 0
Hi net! You've successfully authenticated, but GitHub does not provide shell access.
debug1: channel 0: free: client-session, nchannels 1
Transferred: sent 3564, received 3176 bytes, in 0.7 seconds
Bytes per second: sent 5290.0, received 4714.1
debug1: Exit status 1
```
字数限制, 另起一个回复

Yiskiee

2022-10-14 12:28:52 +08:00

@ob
@corvofeng
@charlie21
接上文:
执行 ssh -Tv git@com, 结果如下 (回复受限, 去除了大部分内容):
```
Hi net! You've successfully authenticated, but GitHub does not provide shell access.
debug1: channel 0: free: client-session, nchannels 1
Transferred: sent 3128, received 2752 bytes, in 0.7 seconds
Bytes per second: sent 4500.6, received 3959.6
debug1: Exit status 1
```

为各 Host 增加 IdentitiesOnly

执行 ssh -T git@net:
```
no such identity: $HOME/.ssh/id_rsa_net: No such file or directory
[email protected]: Permission denied (publickey).
```

执行 ssh -T git@com:
```
no such identity: $HOME/.ssh/id_rsa_com: No such file or directory
[email protected]: Permission denied (publickey).
```

2022-10-14 12:49:00 +08:00

@Yiskiee 同在 linux 环境下验证过，可能有点不一样，试着加下这两个配置：(mac 的，不知道是不是通用)
AddKeysToAgent yes
UseKeychain yes

Yiskiee

2022-10-14 23:27:20 +08:00

@ob 试了一下, 第一条配置存在, 但没有解决这个问题, 第二条配置不可用.

2022-10-15 04:58:16 +08:00

@Yiskiee 把 config 文件里面的$HOME 改成~
我试着用最基本的配置，其他什么都不加都不配，也能成功 clone 不同账号 repo

Host com
HostName github.com
IdentityFile ~/.ssh/id_rsa_com
User git

Host net
HostName github.com
IdentityFile ~/.ssh/id_rsa_net
User git

Yiskiee

2022-10-15 09:18:11 +08:00

@ob 十分感谢! ssh -T 测试成功了, git 克隆私有库也成功了, 实在是不理解为什么会有这种问题.

多个 Github 账号配置 SSH Key 的问题

问题描述

运行环境

问题复现