Introduction and use of finalshell

SSH agreement

• SSH by Secure Shell Abbreviation , It's a network security protocol , A protocol designed to provide security for remote login sessions and other network services .
• stay Linux in ,SSH Its main uses are : User encryption to achieve remote login 、 Password free login between servers .
• SSH By default, the protocol adopts RSA The algorithm realizes asymmetric encryption , You need two keys : public key (public key: Public key ) And private key （private key: Private key for short ).
• Public key and private key are a pair , If you encrypt data with a public key , Only the corresponding private key can be used to decrypt .

SSH Encryption to achieve remote login

• In the enterprise ,Linux The server is usually located in a remote computer room , It is inconvenient for users to operate directly in the machine room ;
• You can use support SSH Protocol Software , Access the server through remote login operation , also SSH The protocol can encrypt the transmitted content .

Preparation before connection

• To configure windows Upper hosts The mapping file , In this way, you can use the host name to access 3 Virtual machines
• hosts File path :C:\Windows\System32\drivers\etc\hosts
• Once configured , Sure win+r, Input cmd Go to the command line , Use ping Test whether the command is effective .

To configure hosts file

To configure hosts file
Add the following lines hosts File and save
192.168.88.151 node1 node1.itcast.cn
192.168.88.152 node2 node2.itcast.cn
192.168.88.153 node3 node3.itcast.cn
Be careful ：
If prompt ：
The click hosts file , Right click Properties

Operate as shown in the figure , Then modify the file , After modification, you can adjust or not adjust the settings back to the original shape

Test whether the configuration is effective

Open Command Prompt , Enter the following , Check in turn

Possible problems ：
Reprint ：ping The reply failed to access the target host

FinalShell Connect Linux

• Connection manager –> newly added SSH Connect （Linux）
  
• add to node1.itcast.cn Related information
  
• Configure in sequence node1,node2,node3
  
• double-click node1, Select accept and save the public key given by the server , Easy for subsequent login

• double-click node2,node3, Same as node1

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