#Step 1: Update /etc/postfix/main.cf
$ sudo vim /etc/postfix/main.cf
Add the following lines, anywhere really, but preferably under the relayhost section:
relayhost = smtp.gmail.com:587 smtp_sasl_auth_enable = yes
This guide assumes a functioning Zwave garage door opener configured with Smartthings. As of this writing Alexa does not support opening and closing garage doors natively. So, some sorcery is required.
Just create a routine, say, "Open garage door" and configure it open your garage door.
Just create a routine, say, "Close garage door" and configure it open your garage door.
Cassandra is a NoSQL database, and is meant for different applications than traditional relational databases. Nevertheless, developers will want (and try) to implement RDBMS features in Cassandra. Unique constraints is one such example.
Many people have asked about creating unique constraints in Cassandra: 1, 2, 3, 4. There is no definitive answer. The most popular answer seems to be to not even try it. Square peg, round hole. If you need unique constraints, Cassandra may not be the tool for the job. Others have suggested to use LWT/CAS. It should be noted that, simply using LWT/CAS does not give us reliable unique constraints that we get i