 Okay, this is a video write-up for the challenge blank, the first problem on the capture-the-flag TJCTF. Challenge prompt is, someone told me there was a flag on this site, so why is it that I can only see blank? And this link here, we can go check out the website, although it is simply a blank page as the challenge suggested, so you can right-click anywhere on the page and select a view page source or simply hit the hotkey control U. And you'll see an HTML comment here denoted by the green text in your browser and these syntax or HTML comment along with the HTML of the page itself, but the flag is simply right here. So we can copy and paste that and submit it and it's just that easy. If we wanted to write a get flag script for this, we could just use curl in our command line, get the URL of this page, which I need to still snag, remove the view source here, we can curl that and there is our output. Let's make it silent with tack s and then simply we can grep for only the line that has the flag and I'm actually going to be using only in tack e to use extended regular expressions. So I can say the flag format tjctf and regular expressions, anything within those braces. We can say color equals none, so make sure we get none, only the text that we want, submit that and of course save this line as our get flag script. Then bash as our shebang line, copy and paste that in there, mark the script as executable so we can run it as often as we need to, redirect that to a saved plain text file, flag dot text and then we can move this to a completed challenge. Perfect. All right, that is the simple solution and easy success for Blank, the first challenge on tjctf. Quick and special shout out to those people that support me on Patreon. You guys are phenomenal. Thank you so much for everything that you do. One dollar a month on Patreon will give you a special shout out just like this at the end of every video, five dollars a month will give you early access to everything I release on YouTube just before it is released. If you guys like these capital flag video write ups or anything else that I tend to do between programming tutorials, etc., please do like this video, maybe leave me a comment if you're willing to subscribe. Join the Discord, link in the description. It's an awesome community of other ctf players, programmers and hackers and hey, I'll see you in the next video.