query: problem updating ubuntu 20.04.1 on Raspberry Pi 4 -- error refers to apt-secure (8) manpage
positive_passages.docid: 120
positive_passages.text: How do I restore the default repositories?
negative_passages.docid: 85009
negative_passages.text: `apt update` failed on Debian Linux
negative_passages.docid: 147789
negative_passages.text: Updating core from 8.4.4 to 8.6.1
negative_passages.docid: 82044
negative_passages.text: Advice installing PSPP on Ubuntu 20.04
negative_passages.docid: 135575
negative_passages.text: How to fix a "Failed to fetch binary-armhf/Packages" error during apt-get update?
negative_passages.docid: 122588
negative_passages.text: Can't connect to ubuntu archive when using apt-get update
negative_passages.docid: 28650
negative_passages.text: `apt-get update` cannot find Ubuntu servers
negative_passages.docid: 133
negative_passages.text: How can I fix a 404 Error when using a PPA or updating my package lists?
negative_passages.docid: 83924
negative_passages.text: error while trying to sudo apt-get update GPG, no sign repository
negative_passages.docid: 16186
negative_passages.text: Requires installation of untrusted packages?
negative_passages.docid: 103929
negative_passages.text: sudo apt upgrade error 18.04 (Broken Packages)
negative_passages.docid: 107009
negative_passages.text: ubuntu 18.04 apt-get upgrade problem "redirection loop encountered."
negative_passages.docid: 6809
negative_passages.text: How do I fix the GPG error "NO_PUBKEY"?
negative_passages.docid: 158683
negative_passages.text: apt-get update failed because certificate verification failed because handshake failed on nodesource
negative_passages.docid: 56150
negative_passages.text: Can't upgrade/update ubuntu 18.04 as apt/dpkg error is showing up
negative_passages.docid: 39732
negative_passages.text: How to fix apt-get install / update not working on my Kali Linux
negative_passages.docid: 152158
negative_passages.text: failed to fetch security undermined error [IP: 91.189.91.38 80] in ubuntu 20.04