Kamis, 05 Juli 2018

How to setting Keyless SSH key, Generate RSA key Copy RSA

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Some time as sysadmin we need to setup the host to login using ssh without typing password
Step 1: Generate RSA key
Generate RSA public and private key by running following command line
[[email protected] ~]$ ssh-keygen -t rsa
Step 2: Copy rsa public key to target machine
Copy rsa public key by running follomand line
[maswachid@ccontrol90 ~]$  ssh-copy-id -i ~/.ssh/id_rsa.pub maswachid@ INFO: Source of key(s) to be installed: "/home/maswachid/.ssh/id_rsa.pub"
The authenticity of host ' (' can't be established.
ECDSA key fingerprint is SHA256:8AEC+g3kNIwoCTf7oMySfVMESepOX+EW/2z7UB2R6AE.
ECDSA key fingerprint is MD5:08:be:f7:78:11:1b:70:7b:64:dc:33:b5:f9:35:68:c1.
Are you sure you want to continue connecting (yes/no)? yes
/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 protected]'s password:

Number of key(s) added: 1

Now try logging into the machine, with:   "ssh '[email protected]'"
and check to make sure that only the key(s) you wanted were added.

you can enter to target machine via ssh without password now

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