Cannot Get Updates for Linux Mint and Ubuntu.

Last time, you were able to install other application softwares for Linux in your Laptop like Gimp, VLC, gThumb, etc...
Unfortunately now, you could hardly install other applications. For example, you want to install LAMP for your laptop however you got some error messages.

like the following:

Err http://security.ubuntu.com/ oneiric-security InRelease

Err http://archive.canonical.com/ oneiric InRelease

Err http://packages.medibuntu.org/ oneiric InRelease

Err http://security.ubuntu.com/ oneiric-security Release.gpg
Unable to connect to 10.blaah.blah.bla
Err http://archive.canonical.com/ oneiric Release.gpg
Unable to connect to 10.blaah.blah.bla
Err http://packages.medibuntu.org/ oneiric Release.gpg
Unable to connect to 10.blaah.blah.bla
Err http://packages.linuxmint.com/ lisa InRelease

Err http://archive.ubuntu.com/ oneiric InRelease

Err http://archive.ubuntu.com/ oneiric-updates InRelease

Err http://packages.linuxmint.com/ lisa Release.gpg
Unable to connect to 10.blaah.blah.bla
Err http://archive.ubuntu.com/ oneiric Release.gpg
Unable to connect to 10.blaah.blah.bla
Err http://archive.ubuntu.com/ oneiric-updates Release.gpg
Unable to connect to 10.blaah.blah.bla
Reading package lists... Done
W: Failed to fetch http://packages.linuxmint.com/dists/lisa/InRelease

W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/oneiric/InRelease

W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/oneiric-updates/InRelease

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/oneiric-security/InRelease

W: Failed to fetch http://archive.canonical.com/ubuntu/dists/oneiric/InRelease

W: Failed to fetch http://packages.medibuntu.org/dists/oneiric/InRelease

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/oneiric-security/Release.gpg Unable to connect to 10.blaah.blah.bla

W: Failed to fetch http://archive.canonical.com/ubuntu/dists/oneiric/Release.gpg Unable to connect to 10.blaah.blah.bla

W: Failed to fetch http://packages.medibuntu.org/dists/oneiric/Release.gpg Unable to connect to 10.blaah.blah.bla

W: Failed to fetch http://packages.linuxmint.com/dists/lisa/Release.gpg Unable to connect to 10.blaah.blah.bla

W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/oneiric/Release.gpg Unable to connect to 10.blaah.blah.bla

W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/oneiric-updates/Release.gpg Unable to connect to 10.blaah.blah.bla

W: Some index files failed to download. They have been ignored, or old ones used instead.

Try this solution:

  Your problem could be greatly caused by a network issue. I have met this problem more often when my network connection is not stable. Try to do it again on another Internet connection. 

Check your Internet connection by typing the following codes to the termnial:

ping google.com

if the time=50 ms or lower... then there you   have a very good Internet connection.