Uploaded March 2025 | Updated September 2026, 2 weeks ago

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hackarcana.com ← check out my courses and CTF challenges ​  
So... What really happens when you press CTRL+D? 🤔

It doesn’t send an EOF signal. It doesn’t close standard input. So… what does it actually do?

Well, as you can see on the thumbnail, it’s like pressing ENTER—but with a twist!

🔍 Here’s what you’ll also learn from the video:
✅ The real reason interactive applications like Bash or Python REPL exit when you press it.
✅ How some programs can get stuck in infinite loops when they don’t handle CTRL+D correctly.
✅ And a fun hands-on experiment for you to try in your own code!
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--- Links:
hackarcana.com ← my courses, articles, and CTF challenges
discord.gg/hackarcana ← hackArcana discord
https://gynvael.coldwind.pl/discord ← my / Paged Out! discord
https://pagedout.institute/ ← my Paged Out! magazine
https://gynvael.coldwind.pl/ ← my blog
https://bsky.app/profile/gynvael.bsky.social ← my Bluesky

--- Music in intro/outro:
TheFatRat - Monody feat. Laura Brehm
Watch the official music video: tinyurl.com/monodytfr
Listen to "Monody": thefatrat.ffm.to/monody
Follow TheFatRat: https://ffm.bio/thefatrat

nervous_testpilot - Office (Frozen Cortext Original Soundtrack)
nervous_testpilot - Our Heroes (Frozen Cortext Original Soundtrack)
nervous_testpilot - Focus (Frozen Synapse Original Soundtrack)
soundcloud.com/nervous_testpilot
nervoustestpilot.bandcamp.com

Stellardrone - Between the Rings
stellardrone.bandcamp.com/album/between-the-rings
soundcloud.com/stellardrone/between-the-rings
youtube.com/@StellardroneMusic

--- Team:
Shoutout and big thanks to my team who have helped me with livestreams and IRC/Discord over the years!
→ foxtrot_charlie
→ KrzaQ
→ masakra
→ hebi
→ maryush
→ disconnect3d