Public key \ private SSH avoid password login

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I've seen it before , Never mind , Before using public key management , The filing machine of Tencent virtual machine , It's very hair like , Check the relevant information , Here's a summary :

character a:192.168.7.188 (ubuntu)

character b:192.168.7.17 (centos)

Hope from a land b When , No need to enter password. My original idea was to b The public key of a Of key In the document , This way a Use public key and b The private key Match . The result is just the opposite ,

The actual operation is to a The public key of b Of key In the document .

stay a Generate key on , command

ssh-keygen -t rsa ( The encryption type here is also the public key choice dsa)

The default will be ~/.ssh A pair of keys exist under the folder

We will id_rsa.pub Copy content from to b Mechanical authorized_keys Go on ok 了 , Assuming that the file does not exist, create another

Here is how to use public key and key management server User rights , Like a server Many developers use , When an employee leaves the company , We all need to change password What? , This is troublesome for everyone , With the key , We usually require everyone to use their own public key to log in server, When employees leave , The administrator only needs to delete the public key of the resigned employee .

If it appears Agent admitted failure to sign using the key. function :ssh-add ~/.ssh/id_rsa

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