Multithreading is a way for a computer program to perform multiple tasks concurrently within a single process. This is achieved by dividing the program into multiple threads, each of which can be executed independently. This can be useful for improving the performance of a program, as it allows multiple cores on a CPU to be utilized more effectively. Multithreading is different from multiprocessing, which involves running multiple separate processes simultaneously.

Wget is a command-line utility for downloading files from the internet. It supports downloading files using multiple threads, which can help speed up the download process by making multiple connections to the server. To download a file using multiple threads with wget, you can use the -N or --no-clobber flag to enable multi-threaded download, and specify the number of threads using the -np or --number-of-threads flag. For example, to download a file using 10 threads, you can use the following command:

wget -N -np 10 <url>

Keep in mind that using multiple threads can sometimes have a negative impact on download performance, so you may need to experiment with different values for the number of threads to find the best setting for your particular situation.