标签：免密 三步 192.168 ecdsa ssh key Linux root id
准备2台linux机器（两台虚拟机，能够ping通）
一.在 client 机器上创建密钥对
有提示的话 不用输入任何文字 直接回车
[root@sc-mysql ~]# ssh-keygen -t ecdsa Generating public/private ecdsa key pair. Enter file in which to save the key (/root/.ssh/id_ecdsa): Enter passphrase (empty for no passphrase): Enter same passphrase again: Your identification has been saved in /root/.ssh/id_ecdsa. Your public key has been saved in /root/.ssh/id_ecdsa.pub. The key fingerprint is: SHA256:eviPHWDw0JVOQ2GAcZZ4vNw2hg8/EYZiNGSkbEbqxgo root@sc-mysql The key's randomart image is: +---[ECDSA 256]---+ | .+B=+==o | | + o===o* | | . =.o+.B o | | o o += B | |E + S* o | |.o + .+ | |. o . .. | | o o . | | o.o | +----[SHA256]-----+
可以查看一下公钥和私钥：
[root@sc-mysql ~]# cd /root/.ssh/ [root@sc-mysql .ssh]# ls id_ecdsa id_ecdsa.pub id_rsa id_rsa.pub known_hosts [root@sc-mysql .ssh]# ll 总用量 20 -rw------- 1 root root 227 2月 26 15:02 id_ecdsa -rw-r--r-- 1 root root 175 2月 26 15:02 id_ecdsa.pub -rw------- 1 root root 1675 9月 19 22:00 id_rsa -rw-r--r-- 1 root root 395 9月 19 22:00 id_rsa.pub -rw-r--r-- 1 root root 876 2月 25 13:31 known_hosts
二.上传公钥至服务器的root用户的家目录下的.ssh/authorized_keys
ssh-copy-id 用来上传公钥 -i 指定公钥的位置
[root@xyy .ssh]# ssh-copy-id -i id_ecdsa.pub root@192.168.31.26 /usr/bin/ssh-copy-id: INFO: Source of key(s) to be installed: "id_ecdsa.pub" The authenticity of host '192.168.31.26 (192.168.31.26)' can't be established. ECDSA key fingerprint is SHA256:v7VzMC5tU2w7NRsf9uLJ5jDFZOtONbNFZAL0KInJLXw. Are you sure you want to continue connecting (yes/no/[fingerprint])? yes /usr/bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed /usr/bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys root@192.168.31.26's password: （192.168.31.26的密码） Number of key(s) added: 1 Now try logging into the machine, with: "ssh 'root@192.168.31.26'" and check to make sure that only the key(s) you wanted were added.
三.验证免密通道是否成功
ssh是linux下的客户端连接命令
[root@xyy .ssh]# ssh root@192.168.31.26 Last login: Sat Jun 26 11:02:54 2021 from 192.168.31.5 [root@fuwuqi ~]#
标签：免密,三步,192.168,ecdsa,ssh,key,Linux,root,id 来源： https://www.cnblogs.com/jichuang/p/16598853.html
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