Cannot install zabbix-agent on Ubuntu 24.04

[dunnsland]

I just upgraded my VM from 22.04 to 24.04 without much a do. The issue that I am facing is that I cannot install the zabbix-agent onto the server.
I checked the version on my zabbix server,
zabbix_server (Zabbix) 6.0.38
zabbix_agentd (daemon) (Zabbix) 6.0.38

on my virtual machine ipbackup, I upgraded the ubuntu version from 22.04 to 24.04
After the upgrade I needed to upgrade the zabbix-agent. No matter what I tried I could not carry out the upgrade. So I removed the zabbix-agent 5.0
I first tried to install zabbix-agent.

root@ipbackup:~# apt install zabbix-agent
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
zabbix-agent is already the newest version (1:6.0.38-1+ubuntu16.04).
You might want to run 'apt --fix-broken install' to correct these.
The following packages have unmet dependencies:
zabbix-agent : Depends: libcurl3 (>= 7.16.2) but it is not installable
Depends: libldap-2.4-2 (>= 2.4.7) but it is not installable
Depends: libmodbus5 (>= 3.0.2) but it is not going to be installed
Depends: libssl1.0.0 (>= 1.0.1) but it is not installable
E: Unmet dependencies. Try 'apt --fix-broken install' with no packages (or specify a solution).

root@ipbackup:~# apt --fix-broken install
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Correcting dependencies... Done
The following packages will be REMOVED:
zabbix-agent
0 upgraded, 0 newly installed, 1 to remove and 0 not upgraded.
1 not fully installed or removed.
After this operation, 691 kB disk space will be freed.
Do you want to continue? [Y/n]
(Reading database ... 182621 files and directories currently installed.)
Removing zabbix-agent (1:6.0.38-1+ubuntu16.04) ...
Processing triggers for man-db (2.12.0-4build2) ...
need restart is being skipped since dpkg has failed

I assumed that the zabbix-agent had been removed so I thought that I would try to install it again.

root@ipbackup:~# apt install zabbix-agent
Reading package lists... Done
Building dependency tree... Done
Reading state information... Done
Package zabbix-agent is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source
E: Package 'zabbix-agent' has no installation candidate

When this failed I thought that I would try to install it from the downloaded file.

root@ipbackup:~# dpkg -i zabbix-agent_6.0.38-1+ubuntu16.04_amd64.deb
Selecting previously unselected package zabbix-agent.
(Reading database ... 182612 files and directories currently installed.)
Preparing to unpack zabbix-agent_6.0.38-1+ubuntu16.04_amd64.deb ...
Unpacking zabbix-agent (1:6.0.38-1+ubuntu16.04) ...
dpkg: dependency problems prevent configuration of zabbix-agent:
zabbix-agent depends on libcurl3 (>= 7.16.2); however:
Package libcurl3 is not installed.
zabbix-agent depends on libldap-2.4-2 (>= 2.4.7); however:
Package libldap-2.4-2 is not installed.
zabbix-agent depends on libmodbus5 (>= 3.0.2); however:
Package libmodbus5 is not installed.
zabbix-agent depends on libssl1.0.0 (>= 1.0.1); however:
Package libssl1.0.0 is not installed.

dpkg: error processing package zabbix-agent (--install):
dependency problems - leaving unconfigured
Processing triggers for man-db (2.12.0-4build2) ...
Errors were encountered while processing:
zabbix-agent

I have searched everywhere and I cannot figure out what to do next. I have tried to install the missing dependencies, but these show as already installed.

Please Help.
Thanks
Lawrence

[ajmjoha]

Okay got it , you're trying to install Zabbix Agent 6.0.38, but you downloaded the package for Ubuntu 16.04 (zabbix-agent_6.0.38-1+ubuntu16.04_amd64.deb). Since you've upgraded to Ubuntu 24.04, you need to install a compatible version of the Zabbix Agent for your current OS.
First you need to remove the zabbix agent (incorrect) from you current os, to do that , please use this commands

sudo apt remove --purge zabbix-agent
sudo apt autoremove

Then you need to be sure that your ubuntu package manager is clean and ready.

sudo apt --fix-broken install
sudo apt update

Check you repository If there’s an old Zabbix repository file, remove it:
sudo rm /etc/apt/sources.list.d/zabbix.list

Then download and install the right repository
wget https://repo.zabbix.com/zabbix/6.0/u...u24.04_all.deb
sudo dpkg -i zabbix-release_6.0-4+ubuntu24.04_all.deb
sudo apt update

Install the zabbix-agent
sudo apt install zabbix-agent

[ajmjoha]

Okay got it , you're trying to install Zabbix Agent 6.0.38, but you downloaded the package for Ubuntu 16.04 (zabbix-agent_6.0.38-1+ubuntu16.04_amd64.deb). Since you've upgraded to Ubuntu 24.04, you need to install a compatible version of the Zabbix Agent for your current OS.
First you need to remove the zabbix agent (incorrect) from you current os, to do that , please use this commands

sudo apt remove --purge zabbix-agent
sudo apt autoremove

Then you need to be sure that your ubuntu package manager is clean and ready.

sudo apt --fix-broken install
sudo apt update

Check you repository If there’s an old Zabbix repository file, remove it:
sudo rm /etc/apt/sources.list.d/zabbix.list

Then download and install the right repository
wget https://repo.zabbix.com/zabbix/6.0/u...u24.04_all.deb
sudo dpkg -i zabbix-release_6.0-4+ubuntu24.04_all.deb
sudo apt update

Install the zabbix-agent
sudo apt install zabbix-agent

[moooola]

Hello

It looks like the repository is still out of date. [6.0.38-1+ubuntu16.04]

If you update to the repository for Ubuntu24.04/Zabbix6.0LTS, I think you will be able to make the necessary updates.

-----
As a supplement, here is an example of a mistake I made.

When you run dpkg -i zabbix-release_latest_6.0+ubuntu24.04_all.deb,
you are asked whether you want to use the version provided by the package maintainer or keep the current version. I accidentally answered "N" and had a hard time recovering.

[dunnsland]

ajmjoha thank you for responding, this did not work the first time I tried, but after persevering a little I managed to get it resolved