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Description of problem: The current Fedora 25 systemd will error if you start a unit with the line "ExecStart=/sbin/runuser -l user -c "/usr/bin/vncserver -localhost %i"" when you have edited the user details. Version-Release number of selected component (if applicable): Draft Fedora 25 Administrators Guide Edition 1 How reproducible: Every time Steps to Reproduce: 1. Implement a vncserver as detailed in https://docs.fedoraproject.org/en-US/Fedora/25/html/System_Administrators_Guide/ch-TigerVNC.html 2. Edit the respective /etc/systemd/system/vncserver@.service file by replacing the user details 3. Start the server using "systemctl start vncserver@:1.server" or as a no root user "sudo systemctl start vncserver@:1.server" and it fails Actual results: /sbin/runuser can only be run by root Expected results: vnc server starts Additional info: I think the problem is created as the vncserver@.service file set the process owner as defined in the line "User=<USER>". When I have set that to a non-root user name the file errors. The standard file line "ExecStart=/usr/bin/vncserver %i" works fine. The errata seems to be a hangover from the old file structure.