I will use this article to collect interesting tips and tricks about using the Linux cron. This is not so much about setting up a cron, but about little things I use or discovered!
The cron daemon is a long-running process that executes commands at specific dates and times. You can use this to schedule activities, either as one-time events or as recurring tasks.
For commands that need to be executed repeatedly (e.g., hourly, daily, or weekly), you can use the crontab command. The crontab command creates a crontab file containing commands and instructions for the cron daemon to execute.
Format is: MIN HOUR DOM MON DOW CMDMinute fieldHour fieldDay of monthDay of weekCommand
Run every 5 minutes
Run yearly, monthly, weekly, daily or on reboot.@yearly will run at 00:00 on Jan 1st for every year.@monthly will run at 00:00 on 1st of every month.@weekly will run at 00:00 on starting of every week.@daily will run at 00:00 on every day.@reboot will run after the server has been rebooted
A real cron does not rely on website activity and executes independently.
Do not forget to disable the virtual WordPress Cron in the wp-config.php!
Paw is a full-featured HTTP client that lets you test the APIs you build or consume. It has a beautiful native OS X interface to compose requests, inspect server responses and generate client code out-of-the-box.
This is one of my go-to tools, when test-driving my API endpoints.
Paw for Mac
Really liking this, as it detaches the wireless connection from the lamp, that might fail at some point.
Light bulbs up to 40W are supported and will even be certified for outdoor usage.
emberlight provides Bluetooth, Wifi connectivity and a proximity sensor, all integrating into IFTTT and accessible through a REST Api.
Structure opened its doors a couple of days ago.
Structure offers a simple and powerful IoT cloud platform for developing the next generation of connected experiences. They offer device management with robust data visualization that reacts in real-time.
They have a nice drag & drop workflow interface that allows you to forward data coming in, combine data or just store it.
I will be testing a builder kit with the platform, that includes the Adafruit Feather Huzzah, which offers native Wifi connectivity. My Raspberry Pi’s will also find their way into the system. The platform allows to consume REST Apis as well, that will make it even more fun to build something unique.
If you are interested in IoT, you should really check it out. Its free :)
Structure / Adafruit Feather Huzzah
„Home automation with Raspberry PI and Arduino using Node.js, MongoDB, HTML5 and Websockets“
Cylon.js @ GitHub