diff --git a/.bashrc b/.bashrc
index a7a4209..99bfa6a 100644
--- a/.bashrc
+++ b/.bashrc
@@ -3,27 +3,33 @@
 # if not running interactively, don't do anything
 [ -z "$PS1" ] && return
 
+# history
+HISTFILESIZE=-1
+HISTCONTROL=ignoredups:erasedups
+trap "history -n; history -w; history -c; history -r;" EXIT
+PROMPT_COMMAND="history -n; history -w; history -c; history -r; $PROMPT_COMMAND"
+
 # readline
-bind "set editing-mode vi"
-bind "set keyseq-timeout 0"
-bind "set show-mode-in-prompt on"
-bind "set vi-ins-mode-string \1\e[01;35m\2+\1\e[0m\2"
-bind "set vi-cmd-mode-string :"
+set -o vi
+bind 'set show-mode-in-prompt on'
+bind 'set vi-ins-mode-string \1\e[01;35m\2+\1\e[0m\2'
+bind 'set vi-cmd-mode-string :'
+bind 'set keyseq-timeout 0'
 
-bind "set keymap vi-command"
-bind "j:history-substring-search-forward"
-bind "k:history-substring-search-backward"
-bind "set keymap vi-insert"
-bind '"\e[A":history-substring-search-backward'
-bind '"\e[B":history-substring-search-forward'
+bind 'set keymap vi-command'
+bind 'j:history-search-forward'
+bind 'k:history-search-backward'
+bind 'set keymap vi-insert'
+bind '"\e[A":history-search-backward'
+bind '"\e[B":history-search-forward'
 
-bind "set show-all-if-ambiguous on"
-bind "set completion-display-width 0"
-bind "set colored-stats on"
-bind "set visible-stats on"
+bind 'set show-all-if-ambiguous on'
+bind 'set completion-display-width 0'
+bind 'set colored-stats on'
+bind 'set visible-stats on'
 
 # prompt
-PS1="\[\e[1m\]\u@\h\[\e[0m\]:\[\e[1;34m\]\w\[\e[0m\]\[\e[1m\]\$\[\e[0m\] "
+PS1="\[\033[01m\]\u@\h:\[\e[01;34m\]\w\[\e[37m\]\$\[\e[00m\] "
 
 # title
 PS1="\[\e]0;\u@\h:\w\a\]$PS1"
@@ -35,13 +41,7 @@ alias grep="grep --color=auto"
 alias ls="ls --color=auto"
 alias ll="ls -AF1"
 alias lll="ls -AFlh"
-
-# history
-shopt -u histappend
-HISTSIZE=-1
-HISTFILESIZE=-1
-HISTIGNORE='exit:q:ls:ll:lll'
-HISTCONTROL='ignoreboth:erasedups'
+alias ff="find 2>/dev/null"
 
 # bash completion
 if ! shopt -oq posix; then
@@ -67,4 +67,4 @@ osc7_cwd() {
     done
     printf '\e]7;file://%s%s\e\\' "${HOSTNAME}" "${encoded}"
 }
-PROMPT_COMMAND=${PROMPT_COMMAND:+$PROMPT_COMMAND; }osc7_cwd
+PROMPT_COMMAND="osc7_cwd; $PROMPT_COMMAND"