I followed the steps in documentation as follows. These steps have served me well on previous upgrades but this time to no avail.
$ wget https://packages.graylog2.org/repo/packages/graylog-2.3-repository_latest.deb
$ sudo dpkg -i graylog-2.3-repository_latest.deb
$ sudo apt-get update
$ sudo apt-get install graylog-server
However when finished I get the following.
root@graylog02:/home/cfsadmin# sudo apt-get install graylog-server
Reading package lists... Done
Building dependency tree
Reading state information... Done
graylog-server is already the newest version (2.2.3-1).
The following packages were automatically installed and are no longer required:
linux-headers-4.4.0-87 linux-headers-4.4.0-87-generic linux-headers-4.4.0-92 linux-headers-4.4.0-92-generic linux-
headers-4.4.0-93 linux-headers-4.4.0-93-generic linux-headers-4.4.0-96 linux-headers-4.4.0-96-generic
linux-image-4.4.0-87-generic linux-image-4.4.0-92-generic linux-image-4.4.0-93-generic linux-image-4.4.0-96-
generic linux-image-extra-4.4.0-87-generic linux-image-extra-4.4.0-92-generic linux-image-extra-4.4.0-93-generic
linux-image-extra-4.4.0-96-generic
Use 'sudo apt autoremove' to remove them.
0 upgraded, 0 newly installed, 0 to remove and 137 not upgraded.
The line that states graylog server is already at the newest version is interesting to me. Any Ideas? Did I miss something simple? Servers are working great but of course are still at the old version.