SSH
SSH (Secure Shell) is a cryptographic network protocol for securely operating network services over an unsecured network, primarily used for remote command-line login and command execution. It provides strong encryption, authentication, and data integrity to protect against eavesdropping, connection hijacking, and other attacks. SSH is widely implemented in tools like OpenSSH and is essential for managing servers, network devices, and cloud instances.
Developers should learn SSH for securely accessing and administering remote systems, such as Linux servers, cloud VMs, or containers, especially in DevOps, sysadmin, and backend roles. It is critical for tasks like deploying applications, troubleshooting issues, and automating scripts via remote execution, offering a more secure alternative to older protocols like Telnet or FTP. Mastery of SSH enhances productivity in distributed environments and is a foundational skill for infrastructure management.