How to Fix 'dpkg: error processing package systemd' Error (/etc/gshadow Group 'adm' Already Exists)

Having trouble installing or updating systemd on your Linux system? Seeing the error message 'dpkg: error processing package systemd (--configure)' along with '/etc/gshadow: Group 'adm' already exists'? This indicates a conflict during the systemd configuration process.

This guide will walk you through resolving this error so you can get your system back on track.

Understanding the Error

This error typically occurs when you try to install or update the systemd package, and your system already has an 'adm' group defined in the /etc/gshadow file. This conflict prevents the systemd package post-installation script from completing successfully.

Resolving the Error

Follow these steps to resolve the error:

1. Open a terminal or SSH session.

2. Edit the /etc/gshadow file as root:

sudo nano /etc/gshadow

3. Locate the 'adm' group entry and remove it. Be careful not to modify any other entries. Save the file and exit the text editor.

4. Reconfigure the systemd package:

sudo dpkg --configure -a

5. Update your system:

sudo apt update && sudo apt upgrade

6. If the issue persists, reinstall the systemd package:

sudo apt-get install --reinstall systemd

7. Run another update and upgrade after reinstalling:

sudo apt update && sudo apt upgrade

Still Facing Issues?

If these steps don't resolve the error, you may need further assistance. Consider searching for solutions on online forums, consulting the documentation for your operating system, or contacting your system administrator.