[vit@localhost ~]$ systemctl list-unit-files | grep sddm
sddm.service enabled
[vit@localhost ~]$ systemctl status default.target
● multi-user.target – Multi-User System
Loaded: loaded (/usr/lib/systemd/system/multi-user.target; enabled; vendor preset: disabled)
Active: active since Fri 2017-03-17 08:55:56 EET; 4min 8s ago
Docs: man:systemd.special(7)

Warning: Journal has been rotated since unit was started. Log output is incomplete or unavailable.
[vit@localhost ~]$ cat /proc/cmdline
BOOT_IMAGE=/vmlinuz-4.9.13-201.fc25.x86_64 root=/dev/mapper/fedora00-root ro rd.lvm.lv=fedora00/root vconsole.font=latarcyrheb-sun16 rd.lvm.lv=fedora00/swap rhgb quiet LANG=en_US.UTF-8
[vit@localhost ~]$ sudo systemctl set-default graphical.target
Removed /etc/systemd/system/default.target.
Created symlink /etc/systemd/system/default.target → /usr/lib/systemd/system/graphical.target.