Which command in UNIX is used to change the ownership of a file?

Answer:

Explanation:

The chown command in UNIX is used to change the ownership of a file or directory. It allows administrators to transfer ownership from one user to another. The basic syntax is chown user filename, where user is the new owner of the file.

For example, running chown newowner file changes the ownership of file to newowner. Additionally, chown user:group file changes both the user and group ownership at the same time. This command is essential for managing file permissions in multi-user environments.

Knowing how to use chown ensures that files are properly assigned to the correct user accounts, maintaining security and access control on UNIX systems. It plays a crucial role in system administration and file management.