shared_history.sh

# History control
HISTFILESIZE=100000
export HISTFILESIZE
HISTSIZE=100000
export HISTSIZE
HISTCONTROL=ignoredups:erasedups
export HISTCONTROL
shopt -s histappend

_bash_history_sync() {
  builtin history -a
  builtin history -c
  builtin history -r
}

history() {
  _bash_history_sync
  builtin history "$@"
}

export PROMPT_COMMAND="${PROMPT_COMMAND:+$PROMPT_COMMAND$'\n'}_bash_history_sync;"