> energy equals mass

That doesn’t mean energy has a weight.

It means it is physically possible to transition energy to mass and vice versa. Sunlight hitting the earth does not add any weight.

Edit: turns out that part was wrong

Also, earth radiates heat out to space. At a rate of (aaaaaaaaalmost, because of the greenhouse effect) 100% of the energy we get from the sun. If it didn’t, earth would be a few million degrees hot by now…

Can’t remember exactly what happened but it involved changing permissions on /bin /sbin and similar. You know for security …

In the end I didn’t have permissions to run chmod, su or sudo

Fortunately there is little that can’t be fixed by booting from a live image.

A drive label is just a string that can be set by any privileged process. Seems like this installation of the new distro didn’t do that. Or you skipped a step in the install where you could have chosen the drive label.

If it is a bug in the installer or if you missed it, I can’t tell.

But you can just change it in gparted or something else.

The thing that confused me when first learning about docker was, that everybody compares it to a virtual machine. It’s not. Containers dont virtualize anything. They take a (single) process from the host OS and separate that into its own environment. All system calls, memory access, file writes etc are still handled by the same os (same kernel). However the process is separated both on the file system and process level. It can’t see other processes outside of the container and it also doesn’t see the real filesystem. It sees a filesystem provided by the container. This also means it sees different file and user permissions. When you run a alpine Linux docker container on an Ubuntu system, the container only containes the (few) files for alpine but no Linux kernel no desktop environment. A process inside that container only sees the alpine files and not the Ubuntu files. It also means all containers see a filesystem independent of each other and can use libraries and dependencies of different versions (they are only files after all).

For administration it makes running complex services easy. You define how to setup that service (what base Linux distro to use, what packages to install, what commands to run, and how to start the process). You can then be save to assume the setup of that service did not interfere with the setup of any other service. “Service 1 needs a certain system wide config changed? Service 2 needs that config in the default state? And both need a different version of the same library?” In containers you can have all at the same time because they each see a different version of the same config and library.

And all this is provided by the kernel itself. All docker does is provide an “easy” way to create and manage containers but could could do all of that using chroot, runc and a few other.

As a note, containers usually don’t come with systemd as they don’t need an init system. You would run the service directly inside the container and then use systemd outside the container to make sure the container is started/restarted, or just docker as it can already do that.

I found a great article demystifying containers recently

They sometimes buy keys using stolen credit cards. When the fraud is found out, the banks will request the money from the developer. They in turn often don’t have a way to lock the fraudulent key, so it remains valid.

The costs for the initial bank transfer, plus the time invested in returning the money to the credit card holder are payed by the developer.

The key reseller has a 100% profit margin, the customer has a valid and cheap game key, and the developer actually lost time and money.

year the brand name was first introduced.

It says so in the legend. Zoom has been a word for a long time but it now also means “participate in a (video) teleconference”, which is a new meaning directly linked to the zoom software released in 2011. When a word became generic is usually very hard to pinpoint exactly (except for zoom that was 2020)

For heroin: I don’t think there was heroin before the introduction of the heroin brand. Bayer literally invented the substance. (Wikipedia says it was invented 23 years earlier in Britain from morphine, but the inventer didn’t do anything with it so it was reinvented later). It was also not a drug you take to get high, it was an over the counter cough suppressant; no needle or spoon or lighter involved. Wild times for sure…