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ssh login without password


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A : Client
B : Server
Enter Passphrase Enter
a@A:~> ssh-keygen -t rsa
Generating public/private rsa key pair.
Enter file in which to save the key (/home/a/.ssh/id_rsa):
Created directory '/home/a/.ssh'.
Enter passphrase (empty for no passphrase):
Enter same passphrase again:
Your identification has been saved in /home/a/.ssh/id_rsa.
Your public key has been saved in /home/a/.ssh/id_rsa.pub.
The key fingerprint is:
3e:4f:05:79:3a:9f:96:7c:3b:ad:e9:58:37:bc:37:e4 a@A

B .ssh 폴 .
a@A:~> ssh b@B mkdir -p .ssh
b@localhost's password:

public 키
a@A:~> cat .ssh/id_rsa.pub | ssh b@B 'cat >> .ssh/authorized_keys'
b@B's password:

. .
ssh b@B chmod 700 .ssh/
ssh b@B chmod 600 .ssh/authorized_keys

a@A:~> ssh b@B hostname

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  • A B A private_key id_rsa , public_key B authorized_keys . authorized_keys .
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