Use ssh-keygen to set ssh password-less login

Ssh is a protocol designed for the security of remote logon sessions and other network services. By default, password authentication is required for ssh connections.

Ssh is a protocol designed for the security of remote logon sessions and other network services. By default, ssh connections require password authentication. you can add system authentication (public key-private key) modifications. after modification, inter-system switching can avoid password input and ssh authentication. The following describes the creation process.

First, check whether there is a public key;

If not, create

Create an ssh public key

Then copy the public key to the managed machine.

[W @ w. ssh] # scp id_rsa.pub root@192.168.xxx.xxx :~ /. Ssh/authorized_keys

Access

# Ssh 192.168.xxx.xxx
The authenticity of host' (<192.168.xx.xxx>) 'Can't be established.
RSA key fingerprint is 34: b9: 92: 06: 53: e6: 91: 4d: 47: 92: 73: 57: 78: 6a: 5d: 09.
Are you sure you want to continue connecting (yes/no )? Yes
Warning: Permanently added' (<192.168.xxx.xxx> '(RSA) to the list of known hosts.

This is because after the first access, ssh will save the authenticated host information in. ssh/known_hosts:

192.168.xxx.xxx ssh-rsa protocol + protocol/RxkB/protocol + YElCgH + protocol/8ULgaKg3LtvP + protocol/p0ml + uuS4DO3Up2VjqoRtqtuzWExnTyAGS/Signature/YLTGF8vVvjo5w =

5. access again. you can log on via ssh without a password.

[Root @ localhost. ssh] # ssh 192.168.36.194
Last login: Fri Apr 22 00:56:45 2011 from 192.168.18.44