query: Unable to update in Ubuntu 15.10
positive_passages.docid: 109338
positive_passages.text: How do I restore the sources.list file?
negative_passages.docid: 85943
negative_passages.text: Can't update or install apps on Ubuntu Touch
negative_passages.docid: 134080
negative_passages.text: Still can't upgrade? Is there a new delay?
negative_passages.docid: 12614
negative_passages.text: Upgrade problem
negative_passages.docid: 115421
negative_passages.text: Ubuntu 13.10 to 14.04 Lts does not upgrade, keeps showing error
negative_passages.docid: 123634
negative_passages.text: Can't update Xcode
negative_passages.docid: 51350
negative_passages.text: While updating the ubuntu 16.04 does not have a Release file Error
negative_passages.docid: 28650
negative_passages.text: `apt-get update` cannot find Ubuntu servers
negative_passages.docid: 4305
negative_passages.text: How do I fix a "Problem with MergeList" or "status file could not be parsed" error when trying to do an update?
negative_passages.docid: 126659
negative_passages.text: upgrade from 11.10 to 12.04 - No upgrade option available in update manager
negative_passages.docid: 140371
negative_passages.text: Update Ubuntu 10.04
negative_passages.docid: 5316
negative_passages.text: Update from 14.04 to 16.04 failed with GPG error
negative_passages.docid: 56150
negative_passages.text: Can't upgrade/update ubuntu 18.04 as apt/dpkg error is showing up
negative_passages.docid: 154072
negative_passages.text: Ubuntu 17.10 doesn't show up in update-manager
negative_passages.docid: 63176
negative_passages.text: How can I update to Ubuntu 21.04?
negative_passages.docid: 31506
negative_passages.text: How do I update Ubuntu manually?
negative_passages.docid: 89107
negative_passages.text: How to update Android Studio in Ubuntu?