diff --git a/.bashrc b/.bashrc
index 5743407..666477c 100644
--- a/.bashrc
+++ b/.bashrc
@@ -4,6 +4,9 @@
 # If not running interactively, don't do anything
 [ -z "$PS1" ] && return
 
+# pgup binded to history search
+bind '"\e[A": history-search-backward'
+
 # don't put duplicate lines or lines starting with space in the history.
 # See bash(1) for more options
 HISTCONTROL=ignoreboth
@@ -54,6 +57,8 @@ fi
 
 if [ "$color_prompt" = yes ]; then
    PS1='${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ '
+   # user: cyan
+   #PS1='${debian_chroot:+($debian_chroot)}\[\033[01;36m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w\[\033[00m\]\$ '
 else
     PS1='${debian_chroot:+($debian_chroot)}\u@\h:\w\$ '
 fi