I use this to have all shells share a history concurrently - which sometimes is confusing if you press "↑" and have an unexpected (possibly dangerous command) b

I use this to have all shells share a history concurrently - which sometimes is confusing if you press "↑" and have an unexpected (possibly dangerous command) but I'm used to it now: shopt -s histappend PROMPT_COMMAND="history -a; history -c; history -r" See more about it here: https://unix.stackexchange.com/questions/1288/preserve-bash-history-in-multiple-terminal-windows https://unix.stackexchange.com/questions/1288/preserve-bash-...