How to update packages in ubuntu 16.04?

Question

SSH

I go to the server via SSH and see the following messages:
167 packages can be updated.
75 updates are security updates.
I want to update application packages, for this I enter the following commands sequentially under root and reboot the server:
apt-get update
apt-get clean
apt-get autoremove
apt-get upgrade
apt-get dist-upgrade
I get the message:
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
After rebooting the server, I log in again via SSH as root and see that the packages have not been updated. What am I doing wrong and how do I update the apps?

Answer 1

The sssh greeting is cached rather than created on the fly
apt-get dist-upgradeno need to do it every time

apt-get update
apt-get upgrade
apt-get autoremove

enough

Answer 2

Thanks for answers. The problem is that on some VPS the greeting is cached and you really need to restart the server to reset the counter.