Password-free login to a remote Linux host via SSH

Host 1 : 172.16.222.88 [[Email protected] ~]

Host 2 : 172.16.198.23 [Email protected]:~#

[[email protected] ~]# ssh-keygen-t RSA = = = "in the host 1 to generate the key file

Generating public/private RSA key pair.

Enter file in which to save the key (/ROOT/.SSH/ID_RSA):

/root/.ssh/id_rsa already exists.

Overwrite (y/n)? y = = = = = è overwrite the original file, if it is the first time it will not appear this

Enter passphrase (empty for no passphrase):

Enter same Passphrase again:

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:

35:8a:19:96:f5:1a:80:04:25:04:e0:66:48:fe:bc:[email protected]

The key ' s Randomart image is:

+--[RSA 2048]----+

|++++o.        . |

|= ..       + . |

|. =   + . +      |

|o O.     + = . |

| o O S |

|            .. |

| E O |

| . |

| |

+-----------------+

[email protected] ~]#

Scp/root/.ssh/id_rsa.pub [email protected]:/root/.ssh/authorized_keys

======= "in the host 1 To upload the generated public key to the host 2 and rename it.

[email protected] ' spassword: = = = = = = "Enter the host 2 password to upload the public key

Id_rsa.pub

100% 408 0.4kb/s 00:00

[email protected] ~]# ssh172.16.198.23 ===== "in the host 1 on the pass SSH Login Host 2

Linux kali64 3.18.0-kali3-amd64#1 SMP Debian 3.18.6-1~kali2 (2015-03-02) x86_64

The programs included with the Kalignu/linux system is free software;

The exact distribution terms for Eachprogram is described in the

Individual files In/usr/share/doc/*/copyright.

Kali Gnu/linux comes with absolutely nowarranty, to the extent

permitted by applicable.

Last Login:tue Jul 22:45:24 from172.16.222.88

[email protected]:~# ===== you can sign in without entering a password.

If you want to let the host 2 Enter password-free login host 1 , according to this

This article is from the "three degree" blog, be sure to keep this source http://6207455.blog.51cto.com/6197455/1674801

Password-free login to a remote Linux host via SSH