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1- Network	2- Postfix	3- Dovecot	4- Postfixadmin	5- PostfixMariaDB	6- DovecotMariaDB
7- RelaySmtp	8- Troubleshoot	9- Selinux	10- GnomeShell	11- Maintenance

10. Gnome-Shell.

If you have set up the Gnome PowerShell graphics interface.
See TemplateVM-GnomeShell.

Uninstalling GnomeShell.
Restart without the graphical interface.
systemctl set-default multi-user.target
reboot

Before removing GnomeShell you must install.
dnf groupinstall 'Minimal Install'
dnf groupinstall 'Server'

Remove GnomeShell.
dnf groupremove "Server with GUI"

Remove Firewalld.
dnf remove firewalld