【Linux】ssh-copy-id三步实现ssh免密登陆

一、本地机器上使用ssh-keygen产生公钥私钥对###

ssh-keygen -t rsa -C "XXXX@163.com"   --->执行完会在~/.ssh/下生成公钥私钥对

查看公钥私钥对：

wucaiyundeMacBook-Pro:~ wucaiyun$ cd ~/.ssh/
wucaiyundeMacBook-Pro:.ssh wucaiyun$ ll
total 24
 899401 0 drwx------   5 wucaiyun  staff   160 12 18 15:59 ./
 686353 0 drwxr-xr-x+ 31 wucaiyun  staff   992 12 19 16:42 ../
 908256 8 -rw-------   1 wucaiyun  staff  1823 12  5 23:25 id_rsa
 908257 8 -rw-r--r--   1 wucaiyun  staff   399 12  5 23:25 id_rsa.pub
1745218 8 -rw-r--r--   1 wucaiyun  staff   350 12 19 17:13 known_hosts

二、用ssh-copy-id将公钥复制到远程欲登陆机器中###

ssh-copy-id -i .ssh/id_rsa.pub  username@192.168.x.xxx

注意: ssh-copy-id 将key写到远程机器的 ~/ .ssh/authorized_key.文件中

三、ssh免密登陆###

wucaiyundeMacBook-Pro:~ wucaiyun$ ssh username@1xx.xx.xxx.xxx

Welcome to Alibaba Cloud Elastic Compute Service !