How to fix Error: CloudPanel couldn’t be installed on Ubuntu 22.04 LTS

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Today during the installation of CloudPanel on the Ubuntu 22.04 LTS server we encountered this error – “Sub-process /usr/bin/dpkg returned an error code (1)”

This is one of the common problems in Ubuntu and other DEB-based systems, can happen in Ubuntu after a failed software installation, or if the installer becomes corrupted. The specific case here is when we installed CloudPanel on an Ubuntu 22.04 LTS server

1. Find the error log to find the cause of the problem

Check the error log generated during installation. These logs can often provide clues about what happened.

$ cat /var/log/syslog
$ cat /var/log/apt/term.log

In this case, we found the problem that occurred during the installation of the “postfix” service.

This results in package installation being corrupted and failing

2. Solution

Package installer is an application that tracks software, updates, and dependencies. If it is corrupted, installing any new software can cause this error message so you need to reinstall the new server and update the package/patch from the beginning before installing the CloudPanel service.

We have installed two services “default-mta” and “apparmor” first

$ apt install default-mta
$ apt install apparmor

Then install Cloudpanel

It has been installed successfully


There are many solutions to solve this problem however this is the simplest solution we can come up with. We hope this article can help you

Good Luck!