How do you setup a GNU/Linux server so that it will go into standby (i.e. suspend) after a specific amount of time, unless there has been recent network traffic on a specific port? Well, well, this is an interesting question. First of all, the default settings for suspend (via GNOME power manager) only check for mouse and keyboard activity to determine if the computer is being actively used. So, if you want to control suspend using a different metric, you’ve got to do a bit of customization.
20181218/DuckDuckGo linux suspend based off of network activity on port
20181218/DuckDuckGo server power management network activity
In this first StackOverflow article, there is an interesting technique used to wake a computer up when another computer tries to access it. Basically, a Raspberry Pi computer runs all the time and listens for ARP request packets for the computer that went to sleep. Note that these request packets will not be sent when the computer is awake. When one of these packets is detected, the Raspberry Pi sends a wake-on-LAN magic packet to the target computer, and it will then wake up.
20181218/https://askubuntu.com/questions/43374/power-management-sleep-wake-up-server-when-accessed
20181218/DuckDuckGo linux server suspend how is idle determined
20181218/https://askubuntu.com/questions/170307/how-does-ubuntu-determine-inactivity-before-suspending
Well, well, now this was an interesting find. First of all, this site
was a bit hard to get to. For whatever reason, it has a rather weird
roaming DNS domain name. During the years 2015 - 2017, the site was
named oils-of-life.com. Then, for whatever reason, I had to search
aroiund a bit to find the modern DNS domain name in 2018. I found the
domain name to be erick.heart-centered-living.org. Yet, the site’s
internal text still refers to oils-of-life.com in some areas, and in
some cases, some of the oils-of-life URLs still work.
Now, this blogger has some hobbies in common with me. Home server, Raspberry Pi, electronics circuits, photography, home monitoring/automation. Also, this blogger has some hobbies underway that I have yet to get into, namely blogging on cooking. This person makes their own bread on a regular basis? Wow.
20181218/https://web.archive.org/web/20150215032951/http://oils-of-life.com:80/blog/linux/server/auto-shutdown-and-auto-suspending-a-linux-server/
20181218/https://web.archive.org/web/20160407065733/http://oils-of-life.com/blog/purpose/
20181218/https://web.archive.org/web/20160407004143/http://oils-of-life.com/blog/linux/bread-dough-rising-time-lapse-gif/
20181218/https://web.archive.org/web/20160607010558/http://oils-of-life.com/blog/linux/server/server-hardware-swaps/
Great article here. You are not a software engineer, you are a software gardener.
20181218/https://web.archive.org/web/20160607013342/http://oils-of-life.com/blog/my-thoughts/you-are-not-a-software-engineer/
WARNING: Contains one swear word.
20181218/http://chrisaitchison.com/2011/05/03/you-are-not-a-software-engineer/
20181218/DuckDuckGo Covering Computers, Food, Fermentation, Timelapse Photography and more.
Ah, here we go. Now, is there a blog article about the domain name migration? Unfortunately, I saw no such blog articles detailing such. However, other blog articles mentioned below do reference a physical home move… but it appeared to have happened quite some time before the domain name move in question.
20181218/http://erick.heart-centered-living.org/linux/server/configure-static-ip-and-installing-ntp/
20181218/http://erick.heart-centered-living.org/purpose/
20181218/http://erick.heart-centered-living.org/contact/
Ah, yes, this is a technical article on the subject that I was looking for.
20181218/http://erick.heart-centered-living.org/linux/server/autoshutdown-code-modded-to-hybrid-sleep-and-allow-required-restarts/
This is an interesting observation. The most starred Python projects on GitHub tend to be machine learning projects. An interactive SVG graph of the most starred was created, and also another one for the most starred C projects.
20181218/http://erick.heart-centered-living.org/info-links/most-starred-python-projects-on-github/
20181218/http://erick.heart-centered-living.org/svg/python_repos.svg
20181218/http://erick.heart-centered-living.org/svg/c_repos.svg
libuv? That one is curiously unfamiliar to me, though I believe it
must be something I should know since it has a short name. Ah, it’s a
variation of libev, mainly by adding support for Windows, which
wasn’t supported by libev. Also, it is mainly popular through its
inclusion and use by Node.js. To remind myself, the similar library
that I became familiar with before through Beej’s Guide to Network
Programming is libevent.
20181218/DuckDuckGo libuv
20181218/https://en.wikipedia.org/wiki/Libuv
20181218/https://en.wikipedia.org/wiki/Libevent
Now, here’s another interesting thing, using Raspberry Pi temperature monitoring to send out an alert if the room temperature drops too low.
20181218/http://erick.heart-centered-living.org/linux/server/ssmtp-installing-and-configuration-and-use-tips/
Now, these are some interesting electronics articles. Building a digital clock from 7400 series TTL 5 V logic. There was an article in Howstuffworks in the year 2000 that unfortunately disappeared from the face of the Internet. Luckily, the author saved a printed copy of that article that was then digitized and added to the blog.
20181218/http://erick.heart-centered-living.org/projects/7490-clock-article-from-2000/
20181218/http://erick.heart-centered-living.org/ttl-chip-clock/24-hour-digital-clock-using-ttl-chips/