Update icub_operating_systems/other-machines/generic-machine.md for Ubuntu 20.04 support

[traversaro]

The documentation in https://github.com/icub-tech-iit/documentation/blob/master/docs/icub_operating_systems/other-machines/generic-machine.md#static-ip-configuration refers to the /etc/network/interfaces file, that from what I understand (@Iaxama @2103simon) it is not supported anymore on Ubuntu 20.04 . Probably we should modify that section to be Ubuntu 20.04 .

Related issue: robotology/robotology-superbuild#481 .

[Iaxama]

With Ubuntu 20.04 i had to set up the network using the nm-connection-editor (in particular to specify the search domains). This might not work for headless machines though.

[pattacini]

Comments @mbrunettini ?

[mbrunettini]

We have two options:

• use NTEPLAN as in headless machines (see this part of the manual )
• Use NetworkMonitor GUI (the common Ubuntu desktop tool)

I'll update the guide with the above two options, once we move to Ubuntu 20.04 (in progress)

Personally, I've never used nm-connection-editor

[pattacini]

Any update on this?

[mbrunettini]

The migration to Ubuntu 20.04 is in progress, see icub-tech-iit/tickets#685