Linux SSH 无密码登录
2017-10-09 22:19
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(转自:https://linuxconfig.org/passwordless-ssh)
Public key authentication allows you to login to a remote host via the SSH
protocol without a password and is more secure than password-based authentication. Try creating a passwordless connection from linuxconfig.local to linuxconfig.org using public-key authentication.
Press ENTER at every prompt.
For added security '''the key itself''' would be protected using a strong ''passphrase''. If a passphrase is used to protect the key, ssh-agent can
be used to cache the passphrase.
Note that no password is required.
Public key authentication allows you to login to a remote host via the SSH
protocol without a password and is more secure than password-based authentication. Try creating a passwordless connection from linuxconfig.local to linuxconfig.org using public-key authentication.
Create key
Press ENTER at every prompt.linuxconfig.local$ ssh-keygen Generating public/private rsa key pair. Enter file in which to save the key (/home/user/.ssh/id_rsa): Enter passphrase (empty for no passphrase): Enter same passphrase again: Your identification has been saved in /home/user/.ssh/id_rsa. Your public key has been saved in /home/user/.ssh/id_rsa.pub. The key fingerprint is: b2:ad:a0:80:85:ad:6c:16:bd:1c:e7:63:4f:a0:00:15 user@host The key's randomart image is: +--[ RSA 2048]----+ | E. | | . | |. | |.o. | |.ooo o. S | |oo+ * .+ | |++ +.+... | |o. ...+. | | . .. | +-----------------+ linuxconfig.local$
For added security '''the key itself''' would be protected using a strong ''passphrase''. If a passphrase is used to protect the key, ssh-agent can
be used to cache the passphrase.
Copy key to remote host
linuxconfig.local$ ssh-copy-id root@linuxconfig.org root@linuxconfig.org's password: Now try logging into the machine, with "ssh 'root@linuxconfig.org'", and check in: .ssh/authorized_keys to make sure we haven't added extra keys that you weren't expecting. linuxconfig.local$
Login to remote host
Note that no password is required.linuxconfig.local$ ssh root@linuxconfig.org Last login: Tue Apr 3 12:47:53 2007 from 192.168.0.39 linuxconfig.org#
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