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I'm trying to reinstall my ros-noetic on Ubuntu 20.04. I have done
sudo apt-get remove ros-* and sudo apt-get autoremove
I think I have already removed all the previous ros.
now I'm following installation guide on ros wiki, but always claims that:
"E: Unable to correct problems, you have held broken packages."

For more detailed information please check this screenshot:

check the screenshot of the terminal

karel
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Jun Meng
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  • Please don't post screenshots of text. – Pilot6 Jun 28 '22 at 08:15
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    Does this answer your question? [How do I resolve unmet dependencies after adding a PPA?](https://askubuntu.com/questions/140246/how-do-i-resolve-unmet-dependencies-after-adding-a-ppa) – karel Jun 29 '22 at 12:19

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