Why is sshd used?

sshd, or Secure Shell Daemon, is used for secure remote access to a computer or server. It allows users to securely log in and access the command-line interface of a remote system over a network. sshd uses encryption and authentication protocols to ensure the confidentiality and integrity of data transmitted between the client and server. It is commonly used by system administrators, developers, and IT professionals for remote administration, file transfers, and secure communication. sshd provides a secure alternative to insecure protocols like Telnet and FTP, protecting sensitive information from unauthorized access and interception.

The major advantage of SSHD here is that it writes the most frequently used data — that is, the operating system and everything associated with it — to an integrated cache based on high-speed NAND memory rather than on a magnetic hard drive. This allows these files to be loaded much faster.