How to install Opera Browser on Ubuntu 18.04 Bionic Beaver Linux -

The objective is to install Opera Browser on Ubuntu 18.04 Bionic Beaver Linux. At this stage to install the Opera browser on Ubuntu 18.04 Bionic Beaver is easy as executing the below command:

$ sudo apt install opera-stable

This is a companion discussion topic for the original entry at

Sergey Chistov

Look like an old instruction. Because here is the result:

\W: GPG error: Index of /opera/… stable InRelease: The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY D615560BA5C7FF72
E: The repository ‘Index of /opera/… stable InRelease’ is not signed.
N: Updating from such a repository can’t be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

Lubos Rendek Mod -> Sergey Chistov

Hi Sergey,

Thank you for your input! There are no old instructions but rather incorrect command order. Try:

$ wget -qO- | sudo apt-key add -
$ sudo add-apt-repository "deb [arch=i386,amd64] stable non-free"
$ sudo apt install opera-stable

Thank you for pointing this out. The article will be updated shortly.

Ra. → Lubos Rendek

This packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may help to resolve the situation:

The following packages have unmet dependencies:

opera-stable : Depends: libcurl3 (>= 7.16.2) but it is not going to be installed
Recommends: pepperflashplugin-nonfree but it is not installable
E: Unable to correct problems, you have held broken packages.

Lubos Rendek Mod -> Ra.

did you try run:

$ sudo apt install -f

Ra. -> Lubos Rendek

Gave up. Am on Xubuntu. Thanks for the tip.