I'm on ubuntu 10.4 and my shell is
When I open several gnome terminals and close them history is properly appended.
When I enter
shopt it says among other things:
Can anyone tell me where the append behaviour is configured?
I wrote a quick tip about setting histappend this on my site but I will paraphrase the post here, to answer your question, I hope.
You should be able to configure histappend to be 'on' by using shopt.
To enable run
To disable run
Does that help?