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Cake day: June 20th, 2023

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  • Oh, you mentioned you don’t want to keep a backup of the entire drive. That is fine, but absolutely back it up before starting the install.

    I would just boot a live Linux image and dd the entire device file onto some sort of storage. That way you can get a bit for bit copy of the drive that you can make it how it was before you touched it. When all is well, then you can ditch the backup. It wouldn’t be a bad idea to keep if the stuff is important. Storage devices do fail.




  • A swap partition is akin to the page file on Windows. The kernel will use it to move memory pages it doesn’t anticipate using in the near future to it so it can use that RAM for other things. It will also use it in a pinch when there isn’t enough RAM on the system. It isn’t strictly necessary, but it can prevent programs from crashing at a huge performance penalty. It is necessary if you want to use sleep or hibernate or whatever it’s called when it is powered off physically but resumes what you were doing instead of booting when you power it back on. That takes as much swap as you have RAM at minimum. If you want that, a good rule of thumb is 1.5 times physical RAM.

    I have servers I administer for my job that have over 100GB of RAM with very little swap, like 4GB. The applications and machine are tuned and sized so the physical RAM is at ~85% and swap is barely used. The swap is mainly for non application stuff like IDS agent, backup agent, monitoring agent, etc.

    If swap becomes a problem, you can adjust the kernel vm.swappiness parameter as needed. It might take some trial and error to get it right.

    Source: I’ve been working with Linux professionally for almost 20 years now.





  • First, I don’t completely disagree with some of your points about problems in the US. I think you are infantilizing people to an extent by ignoring the agency they do have and what they can control.

    I never made any of the claims you are arguing against. Please check usernames.

    What’s wrong is assuming people even have the means to travel in the first place.

    I never made that assumption.

    All I did was ask what is the problem with not traveling when taking time off work. The person I responded to sounded like not traveling was somehow problematic. I just wanted clarification.

    As two other exercises, how would somebody in a city with no public transport be able to drive less?

    I couldn’t agree more. Car dependency is the cause of sooo many of our problems in the US.

    Waste isn’t high because of individual lifestyle

    Yes and no. E.g. A large segment of the US have CHOSEN to drive around in monster trucks and canyoneros instead of more reasonable vehicles. A large portion vote for politicians (GOP) who refuse to even acknowledge it is a problem.

    I think the paycheck to paycheck claims are somewhat exaggerated. There are a lot of people with good incomes that this applies to because of bad choices like the aforementioned vehicle choices, buying larger houses than they need, hiring out every simple job that 99% of people could easily do with a 2 minute video (like replacing the flap in a running toilet), annual extravagant vacations, etc. I think the paycheck to paycheck claims need to be calculated by household size, local cost of living, and income. These people would both reduce their contribution to GHG emissions AND be in a financially better position if they made better choices.

    As far as food choices, non beef options are available pretty much everywhere food is available. Beef is generally more expensive than other meats. Beef is the biggest contributor to GHG emissions. A person of limited means could easily choose the cheaper AND environmentally better options.

    basically no choice on what they consume

    Not entirely true. I can choose to buy a monster truck to commute to work or a small car. Ideally that choice would include transit, bike, etc. I can choose beef, pork, chicken, or lentils for my protein. Even at corner stores, fast food, etc, it is pretty easy to avoid beef. Sure, there are problems like car dependency and the ideal choice would include transit, bike, etc. To claim no choice isn’t really true. The kicker is, the greener option is often the cheaper option.







  • So much to unpack here.

    GNU is not a Linux variant. It is a set of programs and shared libraries.

    ISO 9660 has nothing to do with compression. Just calling it ISO isn’t a good idea for an intro class like that because it is a set of MANY standards. They should have put a little side blurb and called it ISO 9660 in the table.

    tar is an archive tool. It has no compression.

    Why no mention of compression algorithms algorithms vs archive tools?

    Why not have different compression algorithms and their tradeoffs?

    ETA: jar files are just zip files for Java libs/programs. You can open them with zip file tools.