Web Reference: Package python-dev is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source The error is here: "E: Unable to correct problems, you have held broken packages". It looks like you placed a hold on some packages and they cannot be upgraded as a result. Jul 4, 2022 Β· Please supply the command you are running that generates the error messages you posted (e.g., apt-get install python-dev). python-dev is no longer available since Debian 11, Ubuntu 20.10, and any distribution derived from those.
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