This is a very common issue that most users face after installation of GIT.
Extensive troubleshooting of this GIT issue “Git – Permission denied (publickey)” can be done with the below command:
ssh -vT firstname.lastname@example.org
OpenSSH_4.6p1, OpenSSL 0.9.8e 23 Feb 2007 debug1: Connecting to github.com [220.127.116.11] port 22. debug1: Connection established. debug1: identity file /c/Users/arvenkataraman/.ssh/identity type -1 debug1: identity file /c/Users/arvenkataraman/.ssh/id_rsa type -1 debug1: identity file /c/Users/arvenkataraman/.ssh/id_dsa type 2 debug1: Remote protocol version 2.0, remote software version OpenSSH_5.5p1 Debia n-6+squeeze1+github9 debug1: match: OpenSSH_5.5p1 Debian-6+squeeze1+github9 pat OpenSSH* debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_4.6 debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug1: kex: server->client aes128-cbc hmac-md5 none debug1: kex: client->server aes128-cbc 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 The authenticity of host 'github.com (18.104.22.168)' can't be established. RSA key fingerprint is 16:27:ac:a5:76:28:2d:36:63:1b:56:4d:eb:df:a6:48. Are you sure you want to continue connecting (yes/no)? yes Warning: Permanently added 'github.com,22.214.171.124' (RSA) to the list of know n hosts. debug1: ssh_rsa_verify: signature correct debug1: SSH2_MSG_NEWKEYS sent debug1: expecting SSH2_MSG_NEWKEYS debug1: SSH2_MSG_NEWKEYS received debug1: SSH2_MSG_SERVICE_REQUEST sent debug1: SSH2_MSG_SERVICE_ACCEPT received debug1: Authentications that can continue: publickey debug1: Next authentication method: publickey debug1: Trying private key: /c/Users/arvenkataraman/.ssh/identity debug1: Trying private key: /c/Users/arvenkataraman/.ssh/id_rsa debug1: Offering public key: /c/Users/arvenkataraman/.ssh/id_dsa debug1: Authentications that can continue: publickey debug1: No more authentication methods to try. Permission denied (publickey).
Step 1: Navigate to .ssh directory inside your home directory
Step 2: Generate the public/private rsa key pair
Step 3: Copy the SSH key to the clipboard using the below command
cat id_rsa.pub | clip
Step 4: Navigate to your GIT repository in https://github.com/
Step 5: Go to Account Settings
Step 6: Under Account Setting select SSH keys
Step 7: Click on Add SSH key, paste the key copied to the clipboard (in Step 3) and store the key