> For the complete documentation index, see [llms.txt](https://ret2basic.gitbook.io/ctfnote/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ret2basic.gitbook.io/ctfnote/web/os-command-injection/blind-os-command-injection.md).

# Blind OS Command Injection

## Time Delays

You can use an injected command that will trigger a time delay, allowing you to confirm that the command was executed based on the time that the application takes to respond. The `ping` command is an effective way to do this, as it lets you specify the number of ICMP packets to send, and therefore the time taken for the command to run:

```bash
```

This command will cause the application to ping its loopback network adapter for 10 seconds.