I've logged in to SharePoint Online in Office 365, but I'm not able to see Central Admin section. I want to know if a Central Admin section is available on SharePoint Online or, if not, how we can access the same settings that were available there.
We dont have a Central admin in Office 365.
We have an admin site for SharePoint specific service applications, you can navigate to it via below url
You need SharePoint admin permissions for that.
Tenantname is the
.onmicrosoft.com name that you choose when registering for a subscription.
Nice overview of SPO admin capabilities- Office 365 SP Online admin overview
There is no traditional central admin in SharePoint online as we do not have full control in Office 365.
In Office 365 / SharePoint-Online we have the admin center where we have the all the options which Microsoft allow us( very limited as compare to on-prem.).
you can access it on this url
https://portal.office.com/adminportal, from here click on SharePoint Under the Admin Center. if you have proper permission.
In SharePoint on-prem, we have full control in the environment that's why we have the central admin to manage the settings of SharePoint.