I was following [this video][1] at the end it shows how to do basic stuff with Radare2 (r2).

When I try to set a break point with:

    db 0x004005bd

Where `0x004005bd` is the first address of the main function that just does:

    push rbp

But after I run the `db` command it tells me:

    Cannot place a breakpoint on 0x004005bd unmapped memory. See dbg.bpinmaps

I understand what it says, but how do I fix it ?

  [1]: https://youtu.be/3NTXFUxcKPc