How can I download Ubuntu onto a mac, then use it on a Windows PC?
Make an Ubuntu bootable USB drive for a PC using Mac?
Cross-reference packages: which to use, which conflict? Inspired by my earlier question , here is another similar question.  There are many different packages for making cross references. Among them , , , , … The  package defines its own cross-referencing command for theorems…  Which collection of packages provides which kind of functionality, and which packages cause conflicts with each other? what question should be asked to make a persona jQuery serialize does not register checkboxes If I solve someones problem instead of answering their question, should I post a comment instead? How to use siunitx with non numerical values? Why isn't a virus "alive"? The recent  about a new supermassive virus being discovered got me thinking about how we define viruses as non-living organisms whilst they are bigger than bacteria, and much more complex than we first gave them credit for.   What biological differences between viruses and cellular organisms have made viruses be deemed non-living? Do creatures that enter the battlefield at the same time see each other enter? I often hear about the wave-particle duality, and how particles exhibit properties of both particles and waves. However, I wonder, is this actually a duality? At the most fundamental level, we 'know' that everything is made up out of particles, whether those are photons, electrons, or maybe even strings. That light for example, also shows wave-like properties, why does that even matter? Don't we know that everything is made up of particles? In other words, wasn't Young wrong and Newton right, instead of them both being right? Friend can't join world I have an external hard drive and I did something which I shouldn't have done, and I am annoyed that many files are prompting me about Administrator permissions to move a folder.  They are regular files.  How do I reset all the permission on the external hard drive? how to count dates entries monthwise from a resultset Suggested Edits Dashboard doesn't agree with Suggested Edits view Finite ring has only zero divisors and units If a nonzero element $a$ of a ring $\mathbb{D}$ does not have a multiplicative inverse, then $a$ must be a zero divisor.   If $\mathbb{D}$ has finitely many elements, then the statement is true. However, I don't see why, as for the infinite case, 7 isn't a zero divisor only because every element $a &gt; 0$ when multiplied by a $b &gt; 0$ gives you $ab &gt; 0$ which has nothing to do with infinity or finite amounts of elements. Story with multiple 'third planet' races How to sort lines with >> double angle brackets? It seems that sort behaves strangely on lines such as &gt;&gt;b    $ cat test a &gt;&gt;b b c &gt; &gt;&gt;  $ sort test &gt; &gt;&gt; a b &gt;&gt;b c   I would expect the &gt;&gt;b line to be the third line output by sort but it is the fifth. Why does it do this and is there a way to make sort give my expected output?    I'm using GNU/Linux Ubuntu 16.04. How to deal with cross-thread access exceptions? How do I create a vertical version of \not? Which transformations are canonical? Which transformations are ? Trying to identify a science fiction short story from an anthology likely published before 1991.  Aliens invade during a nuclear war (which would be World War III, WWIII, WW3). The warring nations then turn their nukes on the landing sites, but the invasion succeeds.  Believe the setting is in the U.S., possibly Pacific Northwest, but definitely a mountainous region.  Based on negative inference from the aliens' description of humans as fur-less, no-tail, bipeds (or similar), the aliens are apes or monkeys.  The aliens describe Earth as worse than the Hell planet they previously conquered. They see our tanks and think that we can't have more than a few of those to fight with.  Yet the aliens are somewhat benign, as they take some children back to their parents for a stern talking-to after the children run an alien convoy off the road into a chasm by stringing a rope across the road. 2 separate lights on two separate switches on one line - issue