How does mv command usage work internally in Linux?

The mv command in Linux is used for moving files and directories from one location to another. Internally, it works by renaming or moving files within the file system. When you use the mv command, the system checks the source and destination paths and performs the following actions:

1. If the destination is on the same file system as the source, the system will simply rename the file by updating the directory entry.
2. If the destination is on a different file system, the system will copy the file to the new location and then delete the original file.

This process is efficient, especially when moving files within the same file system, as it requires minimal overhead.