現(xiàn)在使用git等很多，自己也嘗試了下，結(jié)果在安裝后執(zhí)行一下命令等時(shí)候總是報(bào)permission denied
ssh -T git@github.com
各種baidu終于搞定。
想要使用git必須先安裝git，可以自行baidu安裝并注冊(cè)github賬號(hào)。這里就不必多說(shuō)。
打開終端輸入以下命令查看是否存在.ssh文件夾
$cd ~/.ssh
如果存在會(huì)返回以下信息
Last login: Sat Jul1 17:45:48 on ttys000
pantieruideMacBook-Pro:~ pantierui$ cd ~/.ssh
pantieruideMacBook-Pro:.ssh pantierui$
如果不存在，可以使用mkdir創(chuàng)建一個(gè).ssh文件夾
通過(guò)以下命令默認(rèn)參數(shù)生成ssh的key
ssh-keygen -t rsa -C xxxxx@gmail.com（注冊(cè)github時(shí)的email）
回車后如下：
pantieruideMacBook-Pro:~ pantierui$ ssh-keygen -t rsa -C "pantierui@hotmail.com"
Generating public/private rsa key pair.
Enter file in which to save the key (/Users/pantierui/.ssh/id_rsa): xxxxxxx(此處為key等名字)
Enter passphrase (empty for no passphrase):（此處為密碼，git驗(yàn)證時(shí)用）
Enter same passphrase again:(再次輸入密碼)
Your identification has been saved in pantierui.
Your public key has been saved in pantierui.pub.
The key fingerprint is:
SHA256:QlhWPjXi1AjbWFiMvalu+yFv4d2NfUj41mhWZkJ196c pantierui@hotmail.com
The key's randomart image is:
+---[RSA 2048]----+
|+O*oo|
|+oO+o..+|
|. + =o.+|
|.o.. o|
|..So ..|
|.... E +|
|....o . * O |
|ooo.. o X o|
|..+o+ . |
+----[SHA256]-----+
pantieruideMacBook-Pro:~ pantierui$
此時(shí)用以下命令查看生成等密鑰（確保當(dāng)前目錄為.ssh）
cat pantierui.pub （此文件為剛剛生成的，記錄下來(lái)以下步驟會(huì)用到）
登陸github網(wǎng)站，找到自己用的的【setting】下的【SSH and GPG keys】，點(diǎn)擊【New SSH key】
【title】此處隨便起個(gè)名字
【Key】此處就是剛剛cat出來(lái)的內(nèi)容
執(zhí)行以下命令驗(yàn)證是否可以鏈接到github
ssh -T git@github.com
會(huì)提示以下信息
The authenticity of host 'github.com (192.30.255.112)' can't be established.
RSA key fingerprint is SHA256:nThbg6kXUpJWGl7E1IGOCspRomTxdCARLviKw6E5SY8.
Are you sure you want to continue connecting (yes/no)?
回復(fù)yes，繼續(xù)。此時(shí)會(huì)報(bào)以下錯(cuò)誤
Permission denied (publickey).
使用以下命令查看log，診斷信息如下
pantieruideMacBook-Pro:.ssh pantierui$ ssh -T -v git@github.com
OpenSSH_7.4p1, LibreSSL 2.5.0
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: Connecting to github.com [192.30.255.112] port 22.
debug1: Connection established.
debug1: key_load_public: No such file or directory
debug1: identity file /Users/pantierui/.ssh/id_rsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /Users/pantierui/.ssh/id_rsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /Users/pantierui/.ssh/id_dsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /Users/pantierui/.ssh/id_dsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /Users/pantierui/.ssh/id_ecdsa type -1
debug1: key_load_public: No such file or directory
debug1: identity file /Users/pantierui/.ssh/id_ecdsa-cert type -1
debug1: key_load_public: No such file or directory
debug1: identity file /Users/pantierui/.ssh/id_ed25519 type -1
debug1: key_load_public: No such file or directory
debug1: identity file /Users/pantierui/.ssh/id_ed25519-cert type -1
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_7.4
debug1: Remote protocol version 2.0, remote software version libssh-0.7.0
debug1: no match: libssh-0.7.0
debug1: Authenticating to github.com:22 as 'git'
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug1: kex: algorithm: curve25519-sha256@libssh.org
debug1: kex: host key algorithm: ssh-rsa
debug1: kex: server->client cipher: chacha20-poly1305@openssh.com MAC: compression: none
debug1: kex: client->server cipher: chacha20-poly1305@openssh.com MAC: compression: none
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ssh-rsa SHA256:nThbg6kXUpJWGl7E1IGOCspRomTxdCARLviKw6E5SY8
debug1: Host 'github.com' is known and matches the RSA host key.
debug1: Found key in /Users/pantierui/.ssh/known_hosts:1
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_NEWKEYS sent
debug1: expecting SSH2_MSG_NEWKEYS
debug1: SSH2_MSG_NEWKEYS received
debug1: rekey after 134217728 blocks
debug1: SSH2_MSG_SERVICE_ACCEPT received
debug1: Authentications that can continue: publickey
debug1: Next authentication method: publickey
debug1: Trying private key: /Users/pantierui/.ssh/id_rsa
debug1: Trying private key: /Users/pantierui/.ssh/id_dsa
debug1: Trying private key: /Users/pantierui/.ssh/id_ecdsa
debug1: Trying private key: /Users/pantierui/.ssh/id_ed25519
debug1: No more authentication methods to try.
Permission denied (publickey).
因?yàn)閟sh會(huì)找id_rsa和id_rsa.pub文件，注意我們生成的pantierui和pantierui.pub不等于前面的兩個(gè)文件，顧驗(yàn)證失敗。使用以下命令復(fù)制出上名的文件
cp pantierui id_rsa && cp pantierui.pub id_rsa.pub
重新執(zhí)行驗(yàn)證命令
ssh -T git@github.com
需要回復(fù)密碼
Enter passphrase for key '/Users/pantierui/.ssh/id_rsa':（此處為創(chuàng)建key時(shí)的密鑰）
Hi pantierui! You've successfully authenticated, but GitHub does not provide shell access.
如果出現(xiàn)上述信息就可以使用github了。
