# Forensics Warmup 2Points: 50
## CategoryForensics
## Question>Hmm for some reason I can't open this [PNG](files/flag.png)? Any ideas?
### Hint>How do operating systems know what kind of file it is? (It's not just the ending!>>Make sure to submit the flag as picoCTF{XXXXX}
## SolutionDo `file flag.png` to find the actual filetype.
However, most image viewer software should be able to open the _.png_ file without any problem.
If this doesn't work change the file extension to _.jpg_
### Flag`picoCTF{extensions_are_a_lie}`