diff --git a/README.md b/README.md
index e3dbd09..f2ee634 100644
--- a/README.md
+++ b/README.md
@@ -58,3 +58,5 @@ CC BY-SA 4.0
邮寄地址：`陕西省西安市西安电子科技大学南校区`，收件人：`杨超`。
打赏二维码如上，金额随意，所得捐款将用于给 Contributors 购买书籍和西瓜，~~可直播~~。
+
+- 2018-12-04 微信 长点心吧* 10
diff --git a/doc/2.1.1_virtualbox.md b/doc/2.1.1_virtualbox.md
index 84a9974..0644bd1 100644
--- a/doc/2.1.1_virtualbox.md
+++ b/doc/2.1.1_virtualbox.md
@@ -97,6 +97,13 @@ r2pipe
oh my zsh
peda
```
+ ```text
+ dpkg --add-architecture i386
+ sudo apt update
+ sudo apt install libc6-i386
+ sudo apt install libc6-dev-i386
+ sudo apt install libc6-dbg:i386
+ ```
- Kali Linux -
- BlackArch -
- REMnux -
diff --git a/doc/6.1.17_pwn_secconctf2016_jmper.md b/doc/6.1.17_pwn_secconctf2016_jmper.md
index f2dc291..dd852e7 100644
--- a/doc/6.1.17_pwn_secconctf2016_jmper.md
+++ b/doc/6.1.17_pwn_secconctf2016_jmper.md
@@ -444,7 +444,6 @@ struct student *my_class[0x1e];
def overflow():
add() # idx 0
add() # idx 1
- raw_input("#")
write_memo(0, 'A'*0x20 + '\x78')
```