systemctl suspend to suspend Ubuntu Linux Laptop

Fig.01: systemctl suspend to suspend Ubuntu Linux Laptop

Fig.01: systemctl suspend to suspend Ubuntu Linux Laptop

To suspend suspend/hibernate from command line in Ubuntu Linux 16.04, run:
systemctl suspend
You will be promoted as follows:

==== AUTHENTICATING FOR org.freedesktop.login1.set-wall-message ===
Authentication is required to set a wall message
Authenticating as: vivek,,, (vivek)
Password: 
==== AUTHENTICATION COMPLETE ===
==== AUTHENTICATING FOR org.freedesktop.login1.suspend ===
Authentication is required for suspending the system.
Authenticating as: vivek,,, (vivek)
Password: 
==== AUTHENTICATION COMPLETE ===

Make sure you enter your password to suspend the laptop. Run the following to hibernate Ubuntu laptop:
systemctl hibernate

Examples and usage: Linux Command: Put Laptop / Netbook In Hibernate / Suspend Mode