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  • linux 下两台电脑之间ssh无密码连接

    例子:在192.168.0.12使用tecmint用户,连接192.168.0.11主机上的sheena用户

    Step 1: Create Authentication SSH-Kegen Keys on – (192.168.0.12)

    First login into server 192.168.0.12 with user tecmint and generate a pair of public keys using following command.

    [tecmint@tecmint.com ~]$ ssh-keygen -t rsa
    
    Generating public/private rsa key pair.
    Enter file in which to save the key (/home/tecmint/.ssh/id_rsa): [Press enter key]
    Created directory '/home/tecmint/.ssh'.
    Enter passphrase (empty for no passphrase): [Press enter key]
    Enter same passphrase again: [Press enter key]
    Your identification has been saved in /home/tecmint/.ssh/id_rsa.
    Your public key has been saved in /home/tecmint/.ssh/id_rsa.pub.
    The key fingerprint is:
    5f:ad:40:00:8a:d1:9b:99:b3:b0:f8:08:99:c3:ed:d3 tecmint@tecmint.com
    The key's randomart image is:
    +--[ RSA 2048]----+
    |        ..oooE.++|
    |         o. o.o  |
    |          ..   . |
    |         o  . . o|
    |        S .  . + |
    |       . .    . o|
    |      . o o    ..|
    |       + +       |
    |        +.       |
    +-----------------+


    Step 2: Create .ssh Directory on – 192.168.0.11

    Use SSH from server 192.168.0.12 to connect server 192.168.0.11 using sheena as user and create .sshdirectory under it, using following command.

    [tecmint@tecmint ~]$ ssh sheena@192.168.0.11 mkdir -p .ssh
    
    The authenticity of host '192.168.0.11 (192.168.0.11)' can't be established.
    RSA key fingerprint is 45:0e:28:11:d6:81:62:16:04:3f:db:38:02:la:22:4e.
    Are you sure you want to continue connecting (yes/no)? yes
    Warning: Permanently added '192.168.0.11' (ECDSA) to the list of known hosts.
    sheena@192.168.0.11's password: [Enter Your Password Here]

    Step 3: Upload Generated Public Keys to – 192.168.0.11

    Use SSH from server 192.168.0.12 and upload new generated public key (id_rsa.pub) on server 192.168.0.11under sheena‘s .ssh directory as a file name authorized_keys.

    [tecmint@tecmint ~]$ cat .ssh/id_rsa.pub | ssh sheena@192.168.0.11 'cat >> .ssh/authorized_keys'
    
    sheena@192.168.1.2's password: [Enter Your Password Here]

    Step 4: Set Permissions on – 192.168.0.11

    Due to different SSH versions on servers, we need to set permissions on .ssh directory and authorized_keys file.

    [tecmint@tecmint ~]$ ssh sheena@192.168.0.11 "chmod 700 .ssh; chmod 640 .ssh/authorized_keys"
    
    sheena@192.168.0.11's password: [Enter Your Password Here]

    Step 5: Login from 192.168.0.12 to 192.168.0.11 Server without Password

    From now onwards you can log into 192.168.0.11 as sheena user from server 192.168.0.12 as tecmint user without password.

    [tecmint@tecmint ~]$ ssh sheena@192.168.0.11
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  • 原文地址:https://www.cnblogs.com/wang985850293/p/5609413.html
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