I have Ubuntu 14.04 and I have tried to install Teamviewer by the command line (it says I need superuser privileges) and I have tried the graphical installer but it says it cannot install.
Update
I have got Superuser privileges but it says
dpkg: error processing archive teamviewer_linux.deb (--install):
cannot access archive: No such file or directory
Errors were encountered while processing: teamviewer_linux.deb