SSH私钥取消密码(passphrase)

取消私钥中的密码：
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chomd 600 ~/.ssh/id_rsa