Where is the suspend/hibernate button in GNOME Shell?
Option 1
Hold "Alt" when in the menu, this will switch the power off button into suspend button.
Option 2
When in the menu, click and hold on the power off button until it turns into suspend button.
Option 3
- Go to settings
- Choose Power
- At the bottom, choose for the value Suspend for the When the Power Button is pressed
Now you can just click the power button to suspend.
There isn't any, Welcome to GNOME!
But like in most of the other cases there's an extension which adds one: Suspend Button. It
Allows to modify the suspend/shutdown button in the status menu.
(screenshot source: extension's homepage at extensions.gnome.org)
Alternatively, if you press alt, the power button should change to the suspend ("pause" symbol) button.
On newer GNOME versions (v3.26 or higher, so Ubuntu 17.10 and later), you can suspend from the 'Activities' overview. Simply click the "Activities" button or press Super and search for "suspend", an icon should appear:
Click it to suspend your system.
Note that you can also perform other actions like shutdown, logout, screen locking in the same way.