ssh 패스워드 없이 로그인 하기
client장비에서 sshkey 생성
Generating public/private rsa key pair. Enter file in which to save the key (/root/.ssh/id_rsa): Created directory '/root/.ssh'. Enter passphrase (empty for no passphrase): #엔터키 입력 Enter same passphrase again: #엔터키 입력 Your identification has been saved in /root/.ssh/id_rsa. Your public key has been saved in /root/.ssh/id_rsa.pub. The key fingerprint is: SHA256:123123 root@client The key's randomart image is: +---[RSA 2048]----+ | | | . . | | . = | | . +.+ | | S.o=o. . | | o= + .| | .+.o=o+o| | .oo=oB*+oE| | o==B+o+==| +----[SHA256]-----+
2. server 1~3까지 ssh 키 복사
$> ssh-copy-id 192.168.10.101 /bin/ssh-copy-id: INFO: Source of key(s) to be installed: "/root/.ssh/id_rsa.pub" The authenticity of host '192.168.10.101 (192.168.10.101)' can't be established. ECDSA key fingerprint is SHA256:123412ss. ECDSA key fingerprint is MD5:01:15:23:36:78:47:11:ca:19:7a:20:30:e7:41:77:b2. Are you sure you want to continue connecting (yes/no)? yes #최초접속의 경우 yes 입력 /bin/ssh-copy-id: INFO: attempting to log in with the new key(s), to filter out any that are already installed /bin/ssh-copy-id: INFO: 1 key(s) remain to be installed -- if you are prompted now it is to install the new keys email@example.com's password: #server장비의 root패스워드 입력 Number of key(s) added: 1 Now try logging into the machine, with: "ssh 'firstname.lastname@example.org'" and check to make sure that only the key(s) you wanted were added.