I am trying to download the iso of backtrack 5 r3 from my mozilla firefox. It is a 3.1GB file. Due to power failure, the download stopped some times in the middle. However, I used the mozilla's retry option to resume my download. It worked for sometimes. It stopped one more time because of power failure. And then, I tried the same mozilla retry. Unfortunately, it is not working.

So far, the download is complete upto 2.9 GB. I am able to see the partially downloaded file in my download as BT5R3-GNOME-32.iso.part. Please help me resume my download.


I browsed a little and I found as if there is another way of resuming failed download. I decided to go with wget. I tried the following command:

wget -c http://ftp.cc.uoc.gr/mirrors/linux/backtrack/BT5R3-GNOME-32.iso -O /home/ramvignesh/Downloads/BT5R3-GNOME-32.iso.parts

But it isn't working. It just starts the download right from the beginning. The download time is horrendous for me. It says the remaining download time is 4days 11hours.


First of all make a copy backup from your BT5R3-GNOME-32.iso.part file, next:

Rename your copied BT5R3-GNOME-32.iso.part file to BT5R3-GNOME-32.iso and switch to Downloads directory cd /home/ramvignesh/Downloads which is your downloaded BT5R3-GNOME-32.iso file (being renamed) is there, then try to resume it by the following wget command:

wget -c "http://ftp.cc.uoc.gr/mirrors/linux/backtrack/BT5R3-GNOME-32.iso"

or use below command directly after renaming it to BT5R3-GNOME-32.iso instead:

wget -c "http://ftp.cc.uoc.gr/mirrors/linux/backtrack/BT5R3-GNOME-32.iso" -O /home/ramvignesh/Downloads/BT5R3-GNOME-32.iso
  • +1 for the proper use of an obscure flag like -c. – Jos Feb 21 '15 at 11:37

Found one more solution for this.

  • create a new folder (say old part) inside your downloads folder
  • move the .part file to the old part folder created
  • now open your browser and start a new download of the same file to be downloaded
  • pause it after some seconds. you'll now have a fresh .part file inside your downloads folder
  • replace it with the .part file inside our old part folder
  • resume the paused download from the browser and get the download going

That's it.

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