chkconfig is a command that list services and its run levels on SysV. Now most distros are using systemd
[root@ns378707 config]# chkconfig --list Note: This output shows SysV services only and does not include native systemd services. SysV configuration data might be overridden by native systemd configuration. If you want to list systemd services use 'systemctl list-unit-files'. To see services enabled on particular target use 'systemctl list-dependencies [target]'. netconsole 0:off 1:off 2:off 3:off 4:off 5:off 6:off network 0:off 1:off 2:off 3:off 4:off 5:off 6:off [root@ns378707 config]#
Here only 2 services on this server as other services are managed by systemd.