Home Security Cameras? Sliding glass door locks?

We use a large rod that fits along the bottom track and prevents the door from being opened. We use one in our two sliding doors in our current house when we go out of town, etc.  This is what we use: www.amazon.com/Master-Lock-Security-Adjustable-White/dp/B0002YUX8I/ref=sr_1_7?crid=THUWT0N2SG2U&dchild=1&keywords=sliding+door+security+bar&qid=1617054745&sprefix=Sliding+doo%2Caps%2C344&sr=8-7

Growing up, my mom just had a large wooden dowel that was cut to size. Inexpensive, but effective. 

We did the rod in the slider when we had that type of doors - the spring shower curtain rods work great and come in tons and tons of colors to match whatever you have.

As several have already stated....my husband cut the handle off of a wooden broom to fit snug in the bottom track between the door that opens and the door frame. We just lift it out when we want to open the slider which is most mornings.

We have 2 patio doors that have been replaced/installed in the past 8 years. They both have a security lock at the bottom. One thing I recommend if you get a security system is to have a glass break alarm installed near the door. That way if the glass shatters it will trigger the alarm. We do use a security company that is local to our area. Also, we have a Nest camera and Ring cameras that are turned on while we are away.