Byobu-screen

Some of the commands can take a while to run. Should your connection drop and the SSH session on Nectar terminates, any commands that are running will terminate too. To mitigate this, once logged on to the Nectar Instance, we’ll run byobu-screen (an enhancement for the screen terminal multiplexer) which allows us to resume a session. In other words, processes running in byobu-screen will continue to run when their window is not visible, even if you get disconnected.

Callout

Attention

We will do this step in the workshop though feel free to try out the byobu-screen commands below.

Starting a byobu-screen session.

On Nectar, to start a byobu-screen session called workshop, type

BASH

byobu-screen -ls

Reconnecting to a byobu-screen session.

Should your SSH session on Nectar terminate, once you log back in to your Nectar instance, list running sessions/screens:

BASH

byobu-screen -r workshop

If it says (Attached) next to the workshop session in the list, you can access workshop which is already attached by:

BASH

byobu-screen -r -d workshop

Detaching or Terminating a byobu-screen session.

• To detach from workshop, type ctrl-a ctrl-d while inside the workshop session. (You will need to configure Byobu’s ctrl-a behaviour if it hasn’t already been configured (text will appear on the screen telling you this). Follow the information on the screen and select 1 for Screen mode).

• To terminate workshop, type ctrl-d while inside the workshop session.