Fast file download with cURL

If you want to download a large file using multiple connections at once, this bash script might be a good option.

We are currently on vacation in Croatia and I forgot to update our cars’ navigation system accordingly. Therefore, I quickly wanted to download an appropriate map bundle from https://updateportal.skoda-auto.com for our Amundsen system in our Skoda Fabia NJ5. Downloading seemed pretty slow with min. one day to finish due to server-side limitations. And because I had to go to the campgrounds’ reception for a descent Wifi hotspot, I needed a faster solution.

After unsuccessfully trying out some dubious browser extensions, I finally decided for this bash script. It downloads multiple file slices at once, whereby their number can be configured by the user. After 15 min the download was finished.

1. Download script

   curl https://github.com/WanghongLin/miscellaneous/blob/master/tools/mcurl.sh >mcurl.sh && chmod 744 mcurl.sh
   

2. Apply script (Number of slices is set by argument -s)

   ./mcurl.sh -s 500 https://infotainment-cdn.skoda-auto.com/base/maps/STD2_2110_EU_DL1_202345.zip
   

3. Done. Slices are merged automatically.