取消SSH私钥密码

经常需要连到远程机器调试，之前生成私钥的时候密码又设置的特别长，每次输入都很头疼，索性将密码清除，方法如下：

使用openssl命令去掉私钥的密码

openssl rsa -in ~/.ssh/id_rsa -out ~/.ssh/id_rsa_new

备份旧私钥

mv ~/.ssh/id_rsa ~/.ssh/id_rsa.backup

使用新私钥

mv ~/.ssh/id_rsa_new ~/.ssh/id_rsa

设置权限

chmod 600 ~/.ssh/id_rsa