query: Unable to update Ubuntu 16.04 through apt-get update
positive_passages.docid: 6809
positive_passages.text: How do I fix the GPG error "NO_PUBKEY"?
negative_passages.docid: 73032
negative_passages.text: Installing apt-get
negative_passages.docid: 44044
negative_passages.text: apt-get install not work at all
negative_passages.docid: 90937
negative_passages.text: apt-get update errors
negative_passages.docid: 12534
negative_passages.text: 14.04 --> 16.04 failed; apt (>= 1.0.1ubuntu2.13)' is not installed
negative_passages.docid: 13970
negative_passages.text: Why am I not getting the Ubuntu 18.04 upgrade?
negative_passages.docid: 60351
negative_passages.text: How can I update to a newer version of Git using apt-get?
negative_passages.docid: 28650
negative_passages.text: `apt-get update` cannot find Ubuntu servers
negative_passages.docid: 135383
negative_passages.text: Unable to update my system Ubuntu13.04: Getting message - requires installation of untrusted packages
negative_passages.docid: 43579
negative_passages.text: I cannot install new packages: "Could not get lock /var/lib/dpkg/lock"
negative_passages.docid: 18622
negative_passages.text: How do I install a different Python version using apt-get?
negative_passages.docid: 5316
negative_passages.text: Update from 14.04 to 16.04 failed with GPG error
negative_passages.docid: 77705
negative_passages.text: Unable to upgrade in ubuntu
negative_passages.docid: 153142
negative_passages.text: Cannot run apt update in a Debian docker container
negative_passages.docid: 107009
negative_passages.text: ubuntu 18.04 apt-get upgrade problem "redirection loop encountered."
negative_passages.docid: 154648
negative_passages.text: Getting error from apt-get when trying to install php5 package
negative_passages.docid: 83216
negative_passages.text: apt get update missing release file