diff --git a/doc/2.1_vm.md b/doc/2.1_vm.md
index 7086552..cbabe7d 100644
--- a/doc/2.1_vm.md
+++ b/doc/2.1_vm.md
@@ -81,3 +81,4 @@ r2pipe
 
 #### 工具安装脚本
 - ctf-tools - https://github.com/zardus/ctf-tools
+- [pwn_env](../src/Others/2.1_pwn_env.sh)
diff --git a/doc/2.5_radare2.md b/doc/2.5_radare2.md
index 1d82e7c..5edb279 100644
--- a/doc/2.5_radare2.md
+++ b/doc/2.5_radare2.md
@@ -276,28 +276,6 @@ rahash2 用于计算检验和，支持字节流、文件、字符串等形式和
 - `-B`：打印处每个块的哈希
 - `-s`：指定字符串（而不是文件）
 - `-a entropy`：显示每个块的熵（`-B -b 512 -a entropy`）
-  - ```
-  $ rahash2 -B -b 1024 a.out
-  0x00000000-0x000003ff sha256: 1fd71dfb92c2c1290c3f6a09e477b470a625aef4ab262e18127e6db790c47487
-  0x00000400-0x000007ff sha256: e4829aeb02e97585d663ace279a04d51e39964367943519e4136ab23f43b642a
-  0x00000800-0x00000bff sha256: 9ace05fc25ac536646f116d1030fbe03a958bc0ee3ae0af4b378e7549553bf5d
-  0x00000c00-0x00000fff sha256: d7f185a66987ff7ba0ac0813ff473c5f75e988c5904399f3e24994cade489f81
-  0x00001000-0x000013ff sha256: 1c24ed40e088544cd39ec974b7ebc6f6fb57a71f7d56455625ffe4f259825671
-  0x00001400-0x000017ff sha256: 9acbb50272925734fb1d1feca94e493dcdcd213c815f6680eecd22cba17a2494
-  0x00001800-0x00001bff sha256: c202fd18e976abdae80e4519f156aa5d7ad1623cd183d85429abdb388910b88b
-  0x00001c00-0x00001fff sha256: 7e23808d6acc635b763ef5b9171af1eb39a428a314e8edbdc02fd985abf19918
-  0x00002000-0x00002097 sha256: a44370a272c40becac05c369467dea4e7444dab674d7db029ff0b8be99330ba0
-  $ rahash2 -B -b 1024 -a entropy a.out
-  0x00000000-0x000003ff   2.820547:   35% [###############------------------------------]
-  0x00000400-0x000007ff   4.855878:   60% [###########################------------------]
-  0x00000800-0x00000bff   0.222447:    2% [---------------------------------------------]
-  0x00000c00-0x00000fff   0.810801:   10% [####-----------------------------------------]
-  0x00001000-0x000013ff   1.672678:   20% [#########------------------------------------]
-  0x00001400-0x000017ff   3.942760:   49% [######################-----------------------]
-  0x00001800-0x00001bff   3.153171:   39% [#################----------------------------]
-  0x00001c00-0x00001fff   1.325161:   16% [#######--------------------------------------]
-  0x00002000-0x00002097   0.942890:   11% [####-----------------------------------------]
-  ```
 
 #### radiff2
 ```text
diff --git a/src/Others/2.1_pwn_env.sh b/src/Others/2.1_pwn_env.sh
new file mode 100644
index 0000000..0dde660
--- /dev/null
+++ b/src/Others/2.1_pwn_env.sh
@@ -0,0 +1,126 @@
+#!/bin/bash
+# usage: ./2.1_pwn_env.sh [func1[ func2[ func3...]]]
+# tested for debian wheezy on armhf
+# from Icemakr
+
+function check_result() {
+    if [ $? -ne 0 ]
+    then
+        res="\033[32m[-]failed to "$1"\033[0m"
+        echo -e $res
+    else
+        res="\033[33m[+]successfully "$1"\033[0m"
+        echo -e $res
+    fi
+}
+
+
+############################# install ################################
+######################################################################
+######################################################################
+
+
+# install vim, git, gcc, python
+function init {
+    #sudo apt-get update
+    #check_result "update apt"
+
+    sudo apt-get install git gcc
+    sudo apt-get install python-dev python-pip
+    check_result "install python"
+    sudo apt-get install python3 python3-pip
+    check_result "install python3"
+
+	sudo apt-get install zsh
+    check_result "install zsh"
+}
+
+# set up oh-my-zsh
+function oh-my-zsh {
+	sh -c "$(wget https://raw.githubusercontent.com/robbyrussell/oh-my-zsh/master/tools/install.sh -O -)" && sudo chsh -s /bin/zsh
+    check_result "install oh-my-zsh"
+}
+
+# set up vim
+function vim {
+    echo -e "set encoding=utf-8\nset fileencoding=utf-8\nset fileencodings=ucs-bom,utf-8,chinese,cp936\nset guifont=Consolas:h15\nlanguage messages zh_CN.utf-8\nset number\nset autoindent\nset smartindent\nset tabstop=4\nset autochdir\nset shiftwidth=4\nset foldmethod=manual\nsyntax enable\nset nocompatible\nset nobackup\ninoremap jk <ESC>" > ~/.vimrc && sudo apt-get install vim
+    check_result "vim"
+}
+
+# install pwn
+function pwn {
+    sudo apt-get install gdb
+    check_result "install gdb"
+    sudo pip install zio
+    check_result "install zio"
+    sudo pip install pwntools
+    check_result "install pwntools"
+    sudo apt-get install socat
+    check_result "install socat"
+}
+
+# install capstone
+function capstone {
+	sudo pip install capstone
+	sudo pip3 install capstone
+	check_result "install capstone-engine"
+}
+
+# install keystone  ---gcc-4.8&&g++-4.8 is OK and gcc-4.6||g++-4.6 is awful:(
+function keystone {
+	sudo apt-get install cmake
+	check_result "install CMake for keystone-engine"
+	git clone https://github.com/keystone-engine/keystone.git
+	# if failed when compiling , after meeting with all the dependency , it's best to remove the project and git clone it again to compile
+	mkdir -p keystone/build
+	cd keystone/build && ../make-share.sh && sudo make install && sudo ldconfig && cd ../bindings/python && sudo make install && sudo make install3
+	check_result "install keystone-engine"
+	cd ../../..
+}
+
+# install unicorn
+function unicorn {
+	sudo apt-get install libglib2.0-dev
+	check_result "install libglib2.0-dev for unicorn-engine"
+	git clone https://github.com/unicorn-engine/unicorn.git
+	# if failed when compiling , after meeting with all the dependency , it's best to remove the project and git clone it again to compile
+	cd unicorn && ./make.sh gcc && sudo ./make.sh install && cd bindings/python && sudo make install && sudo make install3
+	check_result "install unicorn-engine"
+	cd ../../..
+}
+
+# install ROPGadget
+function ROPGadget {
+	sudo pip install ropgadget
+
+	sudo pip3 install ropgadget
+}
+# install gef
+function gef {
+	wget -q -O- https://github.com/hugsy/gef/raw/master/gef.sh | sh
+	check_result "install gef"
+}
+
+# setup checksec
+function checksec {
+    sudo wget https://github.com/slimm609/checksec.sh/raw/master/checksec -O /usr/local/bin/checksec && chmod +x /usr/local/bin/checksec
+    check_result "install checksec"
+}
+
+
+if [ -z $1 ]
+then
+    init
+    pwn
+    capstone
+    keystone
+    unicorn
+    ROPGadget
+    gef
+    checksec
+else
+    for i in $@
+    do
+        $i
+    done
+fi