Can the update manager download only a single package at a time?

I need the update manager to only download a single package at a time and not try to download multiple packages at once.

My slow internet cannot handle multiple connections; slows the download to a crawl and some packages will reset themselves halfway through when they time-out.

EDIT

When using apt-get update multiple repositories get checked:

When using apt-get upgrade multiple packages are downloaded:

Solution 1:

You have two options here.

The Queue-Mode configuration option

The default, "host", creates one outgoing connection for each host. If you set it to "access" it will create one connection per URI type (which I understand to mean, one for http, one for ftp, and so on - since most connections are http, this means it'll access each server sequentially).

One way to do this that will also apply to update-manager is to:

echo 'Acquire::Queue-Mode "access";' >/etc/apt/apt.conf.d/75download

if you want to try it with apt-get once to see if it helps:

apt-get -o Acquire::Queue-mode=access update

The Acquire::http::Dl-Limit option

This is similarly to reduce the bandwidth used to something your connection can handle (and as per the manpage, "this option implicit deactivates the download from multiple servers at the same time").

echo 'Acquire::http::Dl-Limit "70";' >/etc/apt/apt.conf.d/75download

or

apt-get -o Acquire::http::Dl-Limit=70 update

Solution 2:

Rather than using the update manager try sudo apt-get update&&sudo apt-get upgrade in the terminal

It would get the job done and also does not use parallel connections