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Permissions 0644 for '/root/.ssh/id_rsa' are too open. It is required that your private key files are NOT accessible by others. ------------------------ root@media-Vostro-1540:~/.ssh# ssh -T git@github.com @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @         WARNING: UNPROTECTED PRIVATE KEY FILE!          @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ Permissions 0644 for '/root/.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: /root/.ssh/id_rsa Permission denied (publickey). Solution : First check the permission on id_rsa directory root@media-Vostro-1540:~/.ssh# ls -lrt total 12 -rw-r--r-- 1 root root 2160 Jun  4 15:05 known_hosts -rw-r--r-- 1 root root 1766 Jun  4 15:12 id_rsa -rw-r--r-- 1 root root  415 Jun  4 15:12 id_rsa.pub Ch...