Hello,

I'm using windows with cygwin.
My bash history in cygwin is lost between two consecutive shells.

Here are the outputs of some commands that might help to understand the issue:

set -o | grep history
history on

$ grep -i history ~/.bash_profile ~/etc/bash.bashrc ~/etc/profile ~/.profile
grep: /cygdrive/c/cygwin/home/car/etc/profile: No such file or directory
/cygdrive/c/cygwin/home/car/.profile:if [ "x$HISTFILE" == "x/.bash_history" ]; then
/cygdrive/c/cygwin/home/car/.profile: HISTFILE=$HOME/.bash_history

$ ls -la ~/ | grep history -> no output

$ echo $HISTFILE
~/.bash_history
$ echo $HISTSIZE
500
$ echo $HISTFILESIZE
500

grep -i hist .bashrc
# Make bash append rather than overwrite the history on disk
shopt -s histappend
# History Options
# Don't put duplicate lines in the history.
export HISTCONTROL="ignoredups"
# (added) A new shell gets the history lines from all previous shells
PROMPT_COMMAND='history -a'
# HISTIGNORE is a colon-delimited list of patterns which should be excluded.

What could I try to fix this issue ?

Thanks

do you loose all terminal history or only some of the history ? because the history of the last terminal being closed is going to save in history file not all the terminals.

The Definitive Guide to Bash Command Line History may shed some light. Around the "Modifying History Behavior" entry...perhaps.