1. The secret key for generating
[the root @ localhost ~] # SSH-keygen -t # RSA key pair generation, - T representative of the type, there are two kinds of RSA and DSA
Generating public / Private Key pair RSA.
The Enter File in Which to Save key The (/ the root /. SSH / id_rsa): # key file in the default storage location, press enter to
the Created Directory ' /root/.ssh ' .
enter a passphrase (empty for NO a passphrase): # enter key lock code, press Enter or leave blank directly
Enter passphrase Same, Again:
Your Identification has been saved in . / root / SSH . / id_rsa # generated private key
Your public key has been savedin /root/.ssh/id_rsa.pub. #生成的公钥
The key fingerprint is:
SHA256:K1qy928tkk1FUuzQtsdfsdf6dfdfPvHw9lQ+KNuZ4 [email protected]
The key's randomart image is:
+---[RSA 2048]----+
| +. |
| o * . |
| . .O + |
| . *. * |
| S =3+ |
| . =... |
| .oo =+ov+ |
| ==o+B*3o. |
| oo.3=EXO. |
+----[SHA256]-----+
2. The public key distribution
SSH-Copy-ID -i ~ / .ssh / id_rsa.pub [email protected]
3. keys locked file can not be changed
the chattr + I/root/.ssh/id_rsa
the chattr + I / the root /.ssh/id_rsa.pub