To resume a partially-downloaded file with aria2, you can use the -c or --continue flag when running aria2 to instruct it to continue the download from where it left off. Here’s an example command:
aria2c -c http://example.com/file.zip
In this example, we’re resuming a download of file.zip from http://example.com using aria2c and the -c flag.
Note that for aria2 to resume a download, it needs to have access to a partial download file (.aria2) for the partially-downloaded file being resumed. If aria2 cannot find the partial download file, it will start a new download instead of resuming the existing one.
Additionally, some servers do not support resuming downloads, so even if you use the -c flag, aria2 may not be able to resume the download if the server does not support it.
I hope that helps! Let me know if you have any further questions or if there’s anything I can help you with.