第一步: 产生公钥与私钥对：
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[root@local-host]# ssh-keygen -t rsa |
按照提示输入完后，会在~/.ssh目录下生成id_rsa和id_rsa.pub这两个文件
第二步:用ssh-copy-id将公钥复制到远程机器中
ssh-copy-id 将本机的公钥复制到远程机器的authorized_keys文件中，ssh-copy-id也会给远程主机的用户主目录(home)和 ~./ssh 和 ~/.ssh/authorized_keys设置合适的权利。
语法：
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ssh-copy-id [-i [identity_file]] [user@]machine
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选项：
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-i:指定公钥文件
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实例：
把本地的ssh公钥文件安装到远程主机对应的账户下：
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[root@local-host]# ssh-copy-id -i ~/.ssh/id_rsa.pub remote-host root@remote-host's password: #输入远程主机的用户密码
Now try logging into the machine, with "ssh 'remote-host'", and check in:
.ssh/authorized_keys
to make sure we haven't added extra keys that you weren't expecting.
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第三步: 登录到远程机器不用输入密码
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[root@local-host]# ssh remote-hostLast login: Mon Sep 11 18:30:00 2017 from remote-host |
常见问题：
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[root@local-host]# ssh-copy-id -u demo -i ~demo/.ssh/id_rsa.pub demo@remote_host/usr/bin/ssh-copy-id: ERROR: No identities found |
上述是给demo用户赋予无密码登陆的权利
使用选项 -i ，当没有值传递的时候或者 如果 ~/.ssh/identity.pub 文件不可访问（不存在）, ssh-copy-id 将显示上述的错误信息 （ -i选项会优先使用将ssh-add -L的内容）
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[root@local-host]# ssh-agent $SHELL[root@local-host]# ssh-add -LThe agent has no identities.[root@local-host]# ssh-addIdentity added: /home/demo/.ssh/id_rsa (/home/demo/.ssh/id_rsa)[root@local-host]# ssh-add -Lssh-rsa AAAAB3NUaC1TR2SJKAABIwAAAQEAsJIEILuftj8aSxMa3k8t6JvM79DpBVaHreqPShTYp7kISDMUNzUpnyxsHpH1tQ/Ow== /home/demo/.ssh/id_rsa[root@local-host]# ssh-copy-id -i remote-hostdemo@remote-host's password:Now try logging into the machine, with "ssh 'remote-host'", and check in:.ssh/authorized_keysto make sure we haven't added extra keys that you weren't expecting.[Note: This has added the key displayed by ssh-add -L] |
本文转自奔跑在路上博客51CTO博客，原文链接http://blog.51cto.com/qiangsh/1964412如需转载请自行联系原作者
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