[完]本地SSH无密码登陆

1、查看是否安装ssh，返回结果含ssh client&ssh server，则不需要安装

$ rpm -qa | grep ssh

2、未安装ssh，安装ssh，执行命令

• CentOS

$ yum list | grep openssh
$ sudo yum install openssh-clients openssh-server

• Ubuntu

$ sudo apt-get install openssh-server

apt-get安装有问题时，执行sudo apt-get update

3、配置无密码登录

$ ssh localhost
$ exit
$ cd ~/.ssh/                          #执行ssh localhost后会创建.ssh文件夹
$ ssh-keygen -t rsa 
$ cat id_rsa.pub >> authorized_keys
$ chmod 600 ./authorized_keys
$ ssh localhost