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blanklin030/ssh_no_password.md

Created August 3, 2018 10:08
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centos系统多台机器免密码ssh
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ssh_no_password.md

机器假设

  • 现在我们有Hadoop-A、Hadoop-B、Hadoop-C
  • 先配置Hadoop-A

安装ssh

yum install ssh

生成SSH密钥

ssh-keygen -t rsa
  • root用户下会生成一个.ssh的文件目录
  • 看到id_rsa私钥和id_rsa.pub公钥

打开id_rsa.pub公钥

cat id_rsa.pub >> authorized_keys
chmod 600 ./authorized_keys

配置Hadoop-B

复制A/C的公钥

  • 重复A机器配置的步骤
  • 打开authorized_keys文件
  • 复制A机器的公钥id_rsa.pub到authorized_keys文件
  • 复制C机器的公钥id_rsa.pub到authorized_keys文件

配置Hadoop-C

复制A/B的公钥

  • 重复A机器配置的步骤
  • 打开authorized_keys文件
  • 复制A机器的公钥id_rsa.pub到authorized_keys文件
  • 复制B机器的公钥id_rsa.pub到authorized_keys文件

使用主机名互联

vim /et/hosts
192.168.1.100 Hadoop-B
192.168.1.200 Hadoop-A
192.168.1.300 Hadoop-C
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