When I accepted that in the real world you need to have a www subdomain, I was able to add it through AWS. I did not document that process, because AWS did a good job of explaining and it seemed to work perfectly. However, I later found out that it gave a security error in Safari. It said that my valid site may be spoofed. Therefore, I needed to add a www subdomain to my certificate.
Ran this from Technologytales 20190611:
>>>sudo certbot --expand -d existing.com,www.example.comThis error was fixed by using advice from Linuxize 20200101. I had to add their suggested code to two files (example.conf and example-le-ssl.conf).
Everything works, which is great, but someday, I would like to look at what I have with someone who understands Apache best practices. Plus, I should test the fix again after the cron job renews the certificate.
* Note - MySQL was from my notes, references lost
MySQL
select group_concat(distinct ac.animal_id, SEPARATOR ',') as animal_ids
from animal_caretaker ac
where ac.caretaker_id = 15
Postgres
select string_agg(distinct cast (ac.animal_id as varchar), ',') as animal_ids
from animal_caretaker ac
where ac.caretaker_id = 15
Taking off the slim from a Bootstrap 4 jquery link caused a bug. I was able to fix it, without losing the integrity, by putting the new url into the Hash generator.
Details: You use the Subresource Integrity feature by specifying a base64-encoded cryptographic hash of a resource (file) you’re telling the browser to fetch, in the value of the integrity attribute of any <script> or <link> element.
Details are directly quoted from MDN 20200528
To kill the process with pid==40676, you do this:
>> kill -9 40676But if you know the port of a process, are not sure of the name and definitely don't know the id, then here's what to do:
>> lsof -i :8000
Where lsof means list of open files. The following is directly quoted from ss44: "An open file can be a regular file, a directory, a block special file, a character, special file, an executing text reference, a library, a stream or a network file (Internet socket, NFS file or UNIX domain socket.)"
The -i is a way of specifying an internet address. The colon says service or port.
>> sudo lsof -i :8000
The pid (40676 in this example) is displayed along with some other information
>> kill -9 40676
And it's done.