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I downloaded the virtual machine file and opened with virtual box. tried to install a package and failed. Why does it not find the correct mirror? how do I fix it? Should I delete this virtual machine and make my own to save time? Thanks

$ sudo apt-get install cmake
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following extra packages will be installed:
cmake-data
Suggested packages:
codeblocks eclipse
The following NEW packages will be installed:
cmake cmake-data
0 upgraded, 2 newly installed, 0 to remove and 0 not upgraded.
Need to get 3 402 kB of archives.
After this operation, 16,8 MB of additional disk space will be used.
Do you want to continue? [Y/n]
WARNING: The following packages cannot be authenticated!
cmake-data cmake
Install these packages without verification? [y/N] y
Err http://se.archive.ubuntu.com/ubuntu/ utopic/main cmake-data all 2.8.12.2-0ubuntu6
404 Not Found [IP: 130.239.18.165 80]
Err http://se.archive.ubuntu.com/ubuntu/ utopic/main cmake i386 2.8.12.2-0ubuntu6
404 Not Found [IP: 130.239.18.165 80]
E: Failed to fetch http://se.archive.ubuntu.com/ubuntu/poo ... u6_all.deb 404 Not Found [IP: 130.239.18.165 80]

E: Failed to fetch http://se.archive.ubuntu.com/ubuntu/poo ... 6_i386.deb 404 Not Found [IP: 130.239.18.165 80]

E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?

also, sudo apt-get update gives same NOT FOUND errors.

What VM version did you download? 0.6?

Yes 0.6

Are you sure it is only apt-get with the issue? Can you still hit sites with other methods?

The 0.6 VM is in need of an update but hasn't gotten one yet. You could try to the software updater to upgrade to the latest Ubuntu. That might solve your problems.

yes, you are right. I finally let the system do update and apt-get is working. thanks!

nurp wrote:yes, you are right. I finally let the system do update and apt-get is working. thanks!

Good to hear it!! Glad it worked out for you.

I moved this thread the the Crazyflie->Support sub-forum so it's more easily found if other run across the same issue. I also marked it [SOLVED].