apt-get install libffi-dev can't connect [duplicate]

I run sudo apt-get install libffi-dev and I get the following error:

Building dependency tree
Reading state information... Done
The following NEW packages will be installed: libffi-dev
0 upgraded, 1 newly installed, 0 to remove and 291 not upgraded.
Need to get 161 kB of archives.
After this operation, 365 kB of additional disk space will be used.
Err:1 xenial/main amd64 libffi-dev amd64 3.2.1-4 Could not connect to ftp.tecnoera.com:80 (190.113.0.250), connection timed out
E: Failed to fetch Could not connect to ftp.tecnoera.com:80 (190.113.0.250), connection timed out
E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?

I think the url might be broken and that I should use another one but how?

2 Answers

Change the mirrors in 'Software Sources' to the default settings solved the problem. It seems that ftp.tecnoera.com was not working at all at the moment.

Screenshot

The libffi-dev package seems to exist in a couple of repositories, so you might have to specify which one to get it from.

You can do it like this:

1. Open a terminal and type: apt-cache showpkg libffi-dev
2. In the Versions section of the output, look for a version that comes from ubuntu.com and identify the version number. It will look something like 1:20090909-1
3. Use the version number when performing the install as {package}={version}: sudo apt install libffi.dev=1:20090909-1

This should give you what you’re looking for.

Important: The version number here is an example. I do not have a Xenial installation to provide you accurate numbers with.