1. 使用openssl命令去掉私钥的密码
openssl rsa -in ~/.ssh/id_rsa -out ~/.ssh/id_rsa_new
2. 备份旧私钥
mv ~/.ssh/id_rsa ~/.ssh/id_rsa.backup
3. 使用新私钥
mv ~/.ssh/id_rsa_new ~/.ssh/id_rsa
4. 设置权限
chmod 600 ~/.ssh/id_rsa
原文：http://www.cnblogs.com/littlemonsters/p/5783672.html