I got a new keyboard(Lenovo) but it has no sleep key which I use very frequently.
I have a script to do the suspension.
Can I take a rarely used key, like the Pause/Break key and cause it's pressing to put my computer in suspend mode?
I have installed xbindkeys.
You can assign the command
systemctl suspend
to a shortcut key. You can try key combinations for yourself in the dialog for assigning shortcut keys: you will see which work and which cannot be used.