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I tried to install python3-pip using Synaptic. Before beginning installation, it gave the following message:

W: Failed to fetch http://security.ubuntu.com/ubuntu/pool/main/l/linux/linux-libc-dev_4.15.0-42.45_amd64.deb
  404  Not Found [IP: 91.189.91.23 80]

I instructed Synaptic to proceed with the installation. Afterwards, I found the missing file on a Ubuntu mirror site after finding only broken links to it on the Ubuntu site.

After installing the missing file, a pip3 --version query states that it is not installed and Synaptic shows that python3-pip is not installed.

What can I do?

wjandrea
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garya
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1 Answers1

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Your package database is out of date - that old package was withdrawn and superseded by a newer version.

Run apt update to update your package database.

Then apt will try to download the correct package version and the install will work.

user535733
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  • I ran the following sequence, which was successful: (1)sudo apt update (2)sudo apt upgrade (3)sudo apt install python3-pip – garya Dec 22 '18 at 05:37
  • Had same issue in dockerfile, thanks to answer above, changed apt-get to apt and it helped: 
    RUN apt update && apt upgrade -y
    – Artjom Kurapov Aug 27 '23 at 22:11