I want to install GNU octave on an offline Ubuntu 20.04 system. I have another Ubuntu 20.04 system which is connected to the Internet. Is there any way I can download all the dependencies, packages required for GNU octave and the source code together on the online system and then install on the offline system?
Snaps are confined, standalone Linux applications that bundle all their necessary dependencies, which means they do not need to rely on the underlying system, and can run independently of it.
The advantage of using Snap for installing an app like Octave in a computer that does not have Internet access is that everything self-contained. You just need to copy two files.
Open a terminal as the normal user by entering Clrl+Alt+T and enter the command:
snap download octave
This will show the following output:
Fetching snap "octave"
Fetching assertions for "octave"
Install the snap with:
snap ack octave_306.assert
snap install octave_306.snap
Copy of move the two downloaded files, octave_306.assert and octave_306.snap, from the connected computer to a USB flash drive. The files are a little more than 300 MB in total. So, any USB flash drive will do.
Copy the two files from the USB drive to your home folder of the Unconnected computer. "Your home folder" is the default folder when you open a terminal.
Open a terminal by entering Clrl+Alt+T and enter these two lines, one at a time:
sudo snap ack ~/octave_306.assert
sudo snap install ~/octave_306.snap
After you type in the first line you will asked for your sudo password. After you enter the second line you will see this output:
octave 7.1.0 from GNU Octave (octave-snap✓) installed
Now Octave is installed in the Unconnected Computer.
You may delete the files octave_306.assert and octave_306.snap from your home folders after Octave is installed.
Is it possible to install the .snap application in an offline computer?
Note, on my Ubuntu 20.04 I did not need to install the package ubuntu-core as instructed in the above answer.
hope this helps
