git用ssh连接出现权限失败的解决办法
因为mac电脑出现问题，所以自己重新安装了系统。但是发现重装后，git连接不上，出现以下错误：The authenticity of host '192.168.1.1 (192.168.1.1)' can't be established.
RSA key fingerprint is 67:f5:03:b3:45:c2:36:4b:89:ca:0d:d0:bf:c4:db:ee.
Are you sure you want to continue connecting (yes/no)? yes
Warning: Permanently added '192.168.1.1' (RSA) to the list of known hosts.
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@ WARNING: UNPROTECTED PRIVATE KEY FILE! @
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Permissions 0777 for '/Users/hejinlai/.ssh/id_rsa' are too open.
It is required that your private key files are NOT accessible by others.
This private key will be ignored.
bad permissions: ignore key: /Users/hejinlai/.ssh/id_rsa
之前还以为是证书出现了问题，后来才发现，由于git处于安全性考虑，证书是不能给其他人使用，只限本人使用，所以证书的权限必须是700，于是修改证书权限：
hejinlai_iMac:.ssh hejinlai$ chmod 700> 修改完后，重新验证，没有出现上述错误了：
hejinlai_iMac:asrSdk hejinlai$ git pull
Already up-to-date.
hejinlai_iMac:asrSdk hejinlai$
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