1.本机（172.16.10.228）先生成密钥对

ssh-keygen -t rsa

2.执行命令，把本机公钥拷贝到远程机器

ssh-copy-id root@distinctIp

3.查看一下远程机器 、/root/.ssh/authorized_keys文件

cat /root/.ssh/authorized_keys

会看到里边多了个公钥

ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQC3vnLLC8gyD/x5ZFtcN5bGG+ZtIm+qh2ttcyhRAz0GturixwVe+GBDL2DO5fgF7vv9w8x3DMycJWvFRvFV1AJYrD0A2RQfEWvqpNcJLEwUQIppyrSitSPKh9bwTSwfmKceuNHQ/zII8kg9yzABMyswezETTFOsY1Yuh/2wohlLVQD4LJe6kR8tT02vEPz/o+B80ZZ7vUVSjdKLbFKrdyLZmQUCNs15U00peMjDuSeDaQXYtcP5IExfNbQHPHtY3I86STok3iGcSoTB2jNikhYai0mKjaHjCSW4vMw/e5K0OrW00OuGAdSsq24xhQ0Pj3VPhXe10OcGtUV0sU+c4i6d root@172.16.10.228
 

最后从本机就可以访问远程机器了