> For the complete documentation index, see [llms.txt](https://gitbook-88.gitbook.io/ctf-writeup/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://gitbook-88.gitbook.io/ctf-writeup/2020/2020-actf.md).

# 2020 ACTF

- [Include](https://gitbook-88.gitbook.io/ctf-writeup/2020/2020-actf/include.md)
- [BackupFile](https://gitbook-88.gitbook.io/ctf-writeup/2020/2020-actf/backupfile.md)
- [Exec](https://gitbook-88.gitbook.io/ctf-writeup/2020/2020-actf/exec.md)