which do i need MQTT or Mosquito to run in a script?

i dont know what i need.. i really dont understand  mqtt broker  or mosquito

which is the server.. i guess broker  and mosquito is the client?

what i trying to do is i got home assistant running and  set up 2 automations..  

1 to turn on a switch and other to turn off the switch

for now i use   

"test"  as the topic

"turn_on"  as the message to turn on switch

"turn_off" as the message to turn off the switch

works in mqtt part in home assistant to test

but i dont know how to do it in unraid.... as i want to run in a script

like

"mqtt test/turn_on"       to turn on the switch

"mqtt test/turn_off"   to turn off the switch

but i tried installing the mqtt  and went to the gui page and that didnt help me

and i installed the mosquito    and well the logs tell me options  i domt know  i just wanted a command line 

so what do i need to get what i need to do..  as i dont really know what i need.. and i tried google and it didnt help me