TRouble with PPAs: «http://ppa.launchpad.net/octave/stable/ubuntu zesty Release»

[nat43]

Hello @ll,
I have moved to Ubuntu Zesty 17.04. I have encountered many issues that are discussed in other posts, but I tried what they suggest without any success, and these messages appear after:

sudo apt update

1.) E: Repository «http://ppa.launchpad.net/octave/stable/ubuntu zesty Release» ERROR 404

2.) Other problem i have is with libgdal1-dev installation

I do not have such experiences before, and not sure if changing stuff at the source.list or include repositories.

I appreciate your guidance.

Best regards,
Nat

[QIII]

Hello!

Would you please issue the command


sudo apt update

again and post the entirety of the results here?

Please post the results between code tags.

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The first error appears to indicate that the PPA does not exist for Zesty.