HISTTIMEFORMAT='%F %T '
HISTFILESIZE=-1
HISTSIZE=-1
HISTCONTROL=ignoredups
HISTIGNORE=?:??
shopt -s histappend                 # append to history, don't overwrite it
# attempt to save all lines of a multiple-line command in the same history entry
shopt -s cmdhist
# save multi-line commands to the history with embedded newlines
shopt -s lithist
