> For the complete documentation index, see [llms.txt](https://kunalwalavalkar.gitbook.io/write-ups/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://kunalwalavalkar.gitbook.io/write-ups/portswigger-labs/server-side-topics/command-injection/blind-os-command-injection-with-time-delays.md).
# Blind OS command injection with time delays
Let's submit the feedback for one of these products.
We can now proxy the traffic through Burp Suite.
Let's forward this request to the `Repeater` so that we can modify it. Once in the `Repeater` we can set the `email` parameter to the following and send the request:
```
x%40gmail.com||ping+-c+10+127.0.0.1||
```
The response takes 10 seconds to return. We have solved the lab.
