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I’m running Kubuntu 18.10 and when I run sudo apt-get update, I see 3 update-able:

http://gb.archive.ubuntu.com/ubuntu cosmic-updates InRelease[83.2kb ]
http://gb.archive.ubuntu.com/Ubuntu cosmic-backports InRelease [74.6kb]
https://security.ubuntu.com/Ubuntu cosmic-security InRelease [83.2kb]

Then when I run sudo apt-get upgrade, it says 0 to upgrade: 

0 to newly install and 0 to remove  and 0 to upgrade

But on my first command sudo apt-get update, I see 3 get listed above and when I run the update, I get the 0 to upgrade 0 to Newly install, etc.

Am I missing something? I am new to Linux. Someone help please much appreciated.

Raffa
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Curiouskangaroo
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  • Try sudo apt update and follow that up with sudo apt full-upgrade. The "full" is important. – DK Bose Dec 16 '18 at 16:26
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    What is the exact output? Try to copy complete output and paste it in question body. If there are any packages to be upgraded they can be listed by apt list --upgradable. – Kulfy Dec 16 '18 at 16:43
  • Welcome to Ask Ubuntu! Please [edit] the question to make the title more descriptive, and add the exact outputs you get, with code formatting to make it look nice. – wjandrea Dec 16 '18 at 16:55
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    I think you're confusing repos with packages – wjandrea Dec 16 '18 at 16:58

2 Answers2

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If your apt-get update looks like this:

Hit:1 http://archive.ubuntu.com/ubuntu cosmic InRelease
Hit:2 http://security.ubuntu.com/ubuntu cosmic-security InRelease       
Hit:3 http://archive.ubuntu.com/ubuntu cosmic-updates InRelease         
Hit:4 http://archive.ubuntu.com/ubuntu cosmic-backports InRelease
Reading package lists... Done
Building dependency tree       
Reading state information... Done
All packages are up to date.

Or:

Hit:1 http://security.ubuntu.com/ubuntu cosmic-security InRelease
Get:2 http://archive.ubuntu.com/ubuntu cosmic InRelease [242 kB]
Get:3 http://archive.ubuntu.com/ubuntu cosmic-updates InRelease [83.2 kB]
Get:4 http://archive.ubuntu.com/ubuntu cosmic-backports InRelease [74.6 kB]
Get:5 http://archive.ubuntu.com/ubuntu cosmic/multiverse amd64 Packages [195 kB]
Get:6 http://archive.ubuntu.com/ubuntu cosmic/restricted amd64 Packages [13.6 kB]
Get:7 http://archive.ubuntu.com/ubuntu cosmic/universe amd64 Packages [11.6 MB]
Get:8 http://archive.ubuntu.com/ubuntu cosmic/main amd64 Packages [1342 kB]
Get:9 http://archive.ubuntu.com/ubuntu cosmic-updates/multiverse amd64 Packages [1075 B]
Get:10 http://archive.ubuntu.com/ubuntu cosmic-updates/universe amd64 Packages [218 kB]
Get:11 http://archive.ubuntu.com/ubuntu cosmic-updates/main amd64 Packages [146 kB]
Get:12 http://archive.ubuntu.com/ubuntu cosmic-backports/universe amd64 Packages [3019 B]
Fetched 14.0 MB in 5s (2835 kB/s)                          
Reading package lists... Done
Building dependency tree       
Reading state information... Done
All packages are up to date.

That doesn't mean that there are packages that can be updated (as the last line explicitly says). What you are seeing is apt fetching package lists from the repositories. But the package lists tell apt that there are no new versions of the software that's installed on your system, and so there's nothing to upgrade.

See also:

muru
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apt is responsible for maintaining the release/version tracking of packages. It reads the package repositories list in /etc/apt/sources.list file and reads/compares each time apt-get update is called. It compares the local package with the repository, verifies dependencies and produces results at the end of execution. You can check which package needs to be upgraded using the command apt list --upgradable

user1027165
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