# 1. 服务端安装
sudo apt-get install openssh-server
# 客户端安装
# Ubuntu默认安装了SSH client
# sudo apt-get install openssh-client
------------------------
# 2. 进入到宿主目录下,生成本机秘钥同时设置免密登录
# >>> 注意,这里不能使用 root 用户生成秘钥,而是要使用你想要设置的用户 <<<
cd /home/hadoop/
ssh-keygen -t rsa -P ""
# 2.1 将公钥追加到 authorized_keys 文件中
cat .ssh/id_rsa.pub >> .ssh/authorized_keys
# 2.2 赋予 authorized_keys 文件权限
chmod 600 .ssh/authorized_keys
------------------------
# 3. 验证是否成功
ssh localhost
![](https://img-blog.csdnimg.cn/20200415150227408.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1NoZXJsb29vY2s=,size_16,color_FFFFFF,t_70#pic_center)
![](https://img-blog.csdnimg.cn/20200415150257702.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L1NoZXJsb29vY2s=,size_16,color_FFFFFF,t_70#pic_center)
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