ssh-config がよくわからない

複数のgithubアカウントを使う必要が出てきて
レポジトリごとに使い分けたいと考えました。

たとえばこんなふうなふうに ~/.ssh/configに書きます

Host A.github
User git
HostName github.com
IdentityFile ~/.ssh/A_id_rsa

Host B.github
User git
HostName github.com
IdentityFile ~/.ssh/B_id_rsa

~/.ssh/にはA_id_rsaとB_id_rsaとconfigしかありません
githubにはそれぞれ公開鍵を登録してあります。

その後 git remote set-url origin ssh://A.github/A/hogehoge.gitとかすればうまくいくかなーとか思ったんですけどBとして登録されている公開鍵だからだめだよ!と怒れれてしまいました。

この時
ssh -T A.github としても ssh -T B.githubとしても ssh -T github.comとしても
どちらも
Hi B! You've successfully authenticated, but GitHub does not provide shell access.

と出てきてしまいます。

もちろん鍵はどちらも異なっています。
というか ssh-configってHostではなくHostName単位で管理してたりするんでしょうか

詳しく処理を追って見る

ssh -v オプションを教えてもらったので、試してみました。
うーん
/Users/---/.ssh/id_rsaはないんですけどね・・・

➜ .ssh ssh -v -T A.github
OpenSSH_6.2p2, OSSLShim 0.9.8r 8 Dec 2011
debug1: Reading configuration data /Users/---/.ssh/config
debug1: /Users/---/.ssh/config line 6: Applying options for A.github
debug1: Reading configuration data /etc/ssh_config
debug1: /etc/ssh_config line 20: Applying options for *
debug1: /etc/ssh_config line 102: Applying options for *
debug1: Connecting to github.com [192.30.252.128] port 22.
debug1: Connection established.
debug1: identity file /Users/---/.ssh/A_id_rsa type -1
debug1: identity file /Users/---/.ssh/A_id_rsa-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_6.2
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.9p1 Debian-5ubuntu1+github5
debug1: match: OpenSSH_5.9p1 Debian-5ubuntu1+github5 pat OpenSSH_5*
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: server->client aes128-ctr hmac-md5 none
debug1: kex: client->server aes128-ctr hmac-md5 none
debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024<1024<8192) sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
debug1: Server host key: RSA xx:xx:xx:xx:.......
debug1: Host 'github.com' is known and matches the RSA host key.
debug1: Found key in /Users/---/.ssh/known_hosts:1
debug1: ssh_rsa_verify: signature correct
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: Roaming not allowed by server
debug1: SSH2_MSG_SERVICE_REQUEST sent
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Offering RSA public key: /Users/---/.ssh/id_rsa
debug1: Server accepts key: pkalg ssh-rsa blen 279
debug1: Authentication succeeded (publickey).
Authenticated to github.com ([192.30.252.128]:22).
debug1: channel 0: new [client-session]
debug1: Requesting no-more-sessions@openssh.com
debug1: Entering interactive session.
debug1: Remote: Forced command.
debug1: Remote: Port forwarding disabled.
debug1: Remote: X11 forwarding disabled.
debug1: Remote: Agent forwarding disabled.
debug1: Remote: Pty allocation disabled.
debug1: Remote: Forced command.
debug1: Remote: Port forwarding disabled.
debug1: Remote: X11 forwarding disabled.
debug1: Remote: Agent forwarding disabled.
debug1: Remote: Pty allocation disabled.
debug1: Sending environment.
debug1: Sending env LANG = ja_JP.UTF-8
debug1: Sending env LC_CTYPE = ja_JP.UTF-8
debug1: client_input_channel_req: channel 0 rtype exit-status reply 0
debug1: client_input_channel_req: channel 0 rtype eow@openssh.com reply 0
Hi B! You've successfully authenticated, but GitHub does not provide shell access.
debug1: channel 0: free: client-session, nchannels 1
Transferred: sent 3136, received 2920 bytes, in 0.4 seconds
Bytes per second: sent 7570.4, received 7049.0
debug1: Exit status 1

解決

ssh-agentが何故か保持してました。

ssh-add -lで確認
ssh-add -Dで全削除
の上再度試すと正常に動作しました。

ちなみに

unset SSH_AUTH_SOCK とかしておけばssh-agentを殺せるようです。