What is sshlinux-linux operation and maintenance

What is ssh linux? SSH (remote connection tool) connection principle: ssh service is a daemon process (demon), the system monitors the connection of the client in the background, and the process of the ssh server is called sshd, which is responsible for real-time monitoring of the client Request (IP 22 port), including the exchange of public keys and other information. The ssh server consists of 2 parts: openssh (provides ssh service) openssl (provides encryption program) The ssh client can be connected with XSHELL, Securecrt, Mobaxterm and other tools The working mechanism of SSH When the server starts up, it generates a key (768bit public key), and the local ssh client sends a connection request to ssh The server, the server checks the data and IP address sent by the connection point client, and sends the key (768bits) to the client after confirming that it is legal. At this time, the client combines the local private key (256bit) and the server’s public key (768bit) into an encrypted key. The key pair key (1024bit) is sent back to the server, and the connection is established through key-pair data transmission. SSH encryption technology Encryption technology: transmission process, data encryption. 1.SSH1 does not verify…