# append to history, don't overwrite it shopt -s histappend
4. 多终端实时同步
# Save and reload the history after each command finishes export PROMPT_COMMAND="history -a; history -c; history -r; $PROMPT_COMMAND"
TODO
#### Avoid duplicates export HISTCONTROL=ignoredups:erasedups #### When the shell exits, append to the history file instead of overwriting it shopt -s histappend
#### After each command, append to the history file and reread it export PROMPT_COMMAND="${PROMPT_COMMAND:+$PROMPT_COMMAND$'n'}history -a; history -c; history -r"