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From days I'm having this problem. When I run sudo apt update it says

1 package can be upgraded. Run 'apt list --upgradable' to see it.

and sudo apt list --upgradable -a output is 

[NAME]/unknown 3.1.2-2.1 amd64 [upgradable from: 3.0.1-19.1]
[NAME]/now 3.0.1-19.1 amd64 [installed,upgradable to: 3.1.2-2.1]

but sudo apt upgrade says that there isn't anything to upgrade

0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.

I don't even understand if it depends on Ubuntu version 17.04 64-bit or on package repository. One more strange thing is that sudo apt-get update doesn't show that I've 1 package to upgrade but sudo apt-get upgrade says

The following packages have been kept back:
  [NAME]

Solution: After several attempts (all failed) I decided to reinstall Ubuntu and everything is fine now.

simo-r
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    What happens for apt dist-upgrade? – davidbaumann Jun 01 '17 at 20:42
  • Same as apt upgrade – simo-r Jun 01 '17 at 20:44
  • Try to this command sudo rm -rf /var/lib/apt/lists/* && sudo apt update. Is it helpful ? – Ali Razmdideh Jun 01 '17 at 20:48
  • @ali76 Nothing changed. – simo-r Jun 01 '17 at 20:53
  • what is the output of this command : ls /etc | grep motd if you have a files with motd.tail name try to delete it sudo rm /etc/motd.tail then after reboot your problem should be solved. – Ali Razmdideh Jun 01 '17 at 21:02
  • @ali76 I had the file, deleted it, reboot the machine but nothing changed. I edited the question, watch out. – simo-r Jun 01 '17 at 21:12
  • Please read all of this post instructions, it may be helpful https://serverfault.com/questions/262751/updates-in-amazon-ec2-ubuntu-10-04-server/262773#262773 – Ali Razmdideh Jun 01 '17 at 21:56
  • @ali76 I've tried all answers in the post but they didn't work. I think that's because we've different versions of Ubuntu. – simo-r Jun 02 '17 at 06:57
  • @BetaRunner Please, see the thread here https://unix.stackexchange.com/q/388638/16920 – Léo Léopold Hertz 준영 Aug 27 '17 at 11:14
  • As mentioned: sudo rm -rf /var/lib/apt/lists/* && sudo apt-get update Logout. Login. Do you see: do-release-upgradein MOTD? (or have you tried running do-release-upgrade?) -> If you find a resolution, please post as an answer... – B. Shea Aug 31 '17 at 14:51
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    I have the same problem on Ubuntu server 18.04 for some weeks. It says "1 package can be upgraded. Run 'apt list --upgradable' to see it.". If I try this suggestion, then I can see: "libneon27/bionic-updates 0.30.2-3~ubuntu18.04.1 i386 [upgradable from: 0.30.2-2build1] N: There is 1 additional version. Please use the '-a' switch to see it". I tried with bshea's suggestion, but it didn't help. – JanezKranjski Apr 29 '19 at 04:44
  • @simo-r is this related to https://futurestud.io/tutorials/fix-ubuntu-debian-apt-get-keyexpired-the-following-signatures-were-invalid – pokemon blue Jul 21 '19 at 09:15
  • I think people didn't answer because you just list [name] instead of the actual package name. Most likely, you can just install the packages by name: sudo apt install [name] – mchid Sep 21 '19 at 17:13

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