How to Resume Broken Download With wget
02-02-2015

How to continue a broken download with wget
This is a short tutorial on how to continue a broken download with wget, the basic syntax for this is bellow.
wget -c url wget --continue url wget --continue [options] url
If you have a partly downloaded file you can continue the download, like in the example below. Say I was half way through downloading the big 2.2 gigabyte FreeBSD dvd.iso and my internet cut out for a second and broke the download with the following command.
wget "ftp://ftp.freebsd.org/pub/FreeBSD/releases/amd64/amd64/ISO-IMAGES/10.1/FreeBSD-10.1-RELEASE-amd64-dvd1.iso"
I have pretty slow internet so I don't want to start this right from the beginning and have to wait for the whole thing again. You can continue the download by being in the same directory as the file you was downloading before and run one of the following commands to continue from where it broke.
wget -c "ftp://ftp.freebsd.org/pub/FreeBSD/releases/amd64/amd64/ISO-IMAGES/10.1/FreeBSD-10.1-RELEASE-amd64-dvd1.iso"
Or
wget --continue "ftp://ftp.freebsd.org/pub/FreeBSD/releases/amd64/amd64/ISO-IMAGES/10.1/FreeBSD-10.1-RELEASE-amd64-dvd1.iso"
As long as there is a file named the same as the file you was downloading "FreeBSD-10.1-RELEASE-amd64-dvd1.iso in this example" in the current directory, wget will assume that it's the first portion of the remote file, and will ask the server to continue the retrieval from an offset equal to the length of the local file so you won't need to fully download it again.

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