Rsync
Rsync is a fast and versatile file synchronization and transfer tool for Unix-like systems, designed to efficiently copy and sync files locally or between remote hosts. It uses a delta-transfer algorithm to minimize data transfer by sending only the differences between source and destination files, making it highly efficient for backups, mirroring, and incremental updates. It supports compression, encryption via SSH, and preservation of file permissions, ownership, and timestamps.
Developers should learn and use Rsync for efficient file synchronization tasks, such as deploying code to servers, backing up data, or mirroring directories across systems, especially when dealing with large datasets or limited bandwidth. It is ideal for automating backups, syncing development environments, and managing file transfers in DevOps workflows, offering reliability and speed over traditional tools like SCP or FTP.