Question

There’s a file on disk which can be very large. Is there any way to delete the last N bytes from it without copying the remaining content to another file?

Answer 1

How about this fragment of C# .NET code?

FileInfo fi = new FileInfo("filename");
FileStream fs = fi.Open(FileMode.Open);

long bytesToDelete = 5000;
fs.SetLength (Math.Max(0, fi.Length - bytesToDelete));

fs.Close();