/dev/random

screen in screen in screen...

Recently ran into an issue where I was running a screen session in an existing screen.

My usual workflow is to start a new screen session each day using a custom screen startup script (since I have some env vars I'd like to renew each day).

I had to then ssh into a remote machine and run a daemonized job in screen that wrote some output I needed to revisit.

The problem arose in that when I tried to detach from the inner screen, I ended detaching from the original screen I had started on my local machine. After some quick googling, I found this.

Since the inner screen was started on a remote machine that didn't have my .screenrc, the global escape option was still the default ctrl-a, and I didn't need to go through the usual hoops when detaching from the inner screen.

Reference for myself:

local$ screen-start  # start screen session
local$ screen -x  # attach to screen
local$ ssh remote  # in orig screen
remote$ screen -dmS 'foo.sh' foo.sh  # start/attach new daemonized screen
remote$ ^ad  # detach from inner screen
remote$ ^d  # logout from remote machine
local$  # back to local machine in orig screen

Can also do:

$ screen -d -D