Ubuntu 18.04.2 terminal
"export PS1=" for customizing shell prompt
I'm trying to change sign text color in Java Edition on Windows 10. According to , this is done using the § symbol:  To enter &quot;§&quot; on Windows with most US/UK English keyboards type ALT + NUMPAD_2 NUMPAD_1  This works for me inside Notepad or this browser. However, when I enter this sequence in the sign input dialog, nothing happens. What could be causing this? Determinant of a special $n\times n$ matrix Is there some trick to burning a cd with the CD/DVD creator?    I'm installing k3b because that's a known entity.  What is this, and where is the "burn" button?  Help just tells me this is Nautilus 3.4.1, but I don't see a .  There's no option to burn in the Files menu, nor does clicking on the whitespace indicate an option to burn anything. Casting a Somatic, non-Material spell while holding a focus In  a side issue came up of whether you can cast a spell with Somatic components but no Material components while holding a focus in the hand used for Somatic components.  My reading of the rules sees "A spellcaster must have a hand free to access a spell's material components--or to hold a spellcasting focus--but it can be the same hand that he or she uses to perform somatic components." - it doesn't say you have to be holding the focus for the purpose of avoiding materials.  However, @Adeptus and @enkryptor argue that - since that rule is in the section on Material components - you don't consult it in for spells without Material, and fall back to the Somatic rule "the caster must have free use of at least one hand".  (I also appeal to the logic of fluff - why should it be harder to cast a spell with fewer components?)  Is there an official RAW or Word Of God on this matter? Can you cast a material-less, somatic spell while holding a focus in your only free hand? Here is what I do:   restart machine with Windows 8.1 determine "EFI System" partition with the Disk Management utility run command prompt as administrator type diskpart type select disk 0 then select partition 2 then assign open windows explorer windows+e refresh if the drive is not showing F5 try to open drive by double clicking   What I expected to happen:  I can at least look at my EFI partition files.  What happened:    after clicking continue    after clicking "security tab" link, no security tab    What do I need to do to access my EFI partition on Windows 8.1? In The Witness, I was walking along the coast, and I came upon this:    Now, since I've learned      that mazes can be embedded in the environment,   I see the puzzle here, but I just can't get the pieces to line up well enough.  Standing on the couch and walking all around it doesn't seem to get me a       functional maze.   Where do I need to stand to activate the puzzle successfully? If a sports team is down by 1-2 in a best of 7 series, what is their chance of winning (if both teams have a 1/2 chance of winning every game)? I know that the team has to win 3 of the 4 remaining games. So I thought that from the 4 remaining games, there are a total of $2^4 = 16$ total different outcomes.   Could someone point me towards the right direction to determine the probability of the team winning 3 of the 4 remaining games? Would it be 4C3/16 since the three wins can be chosen amongst the 4 games left? meta_query with meta values as serialize arrays I'm working on a project in which I'm creating a custom post type and custom data entered via meta boxes associated with my custom post type. For whatever reason I decided to code the meta boxes in such a way that the inputs in each metabox are part of an array. For instance, I'm storing longitude and latitude:  &lt;p&gt;      &lt;label for="latitude"&gt;Latitude:&lt;/label&gt;&lt;br /&gt;      &lt;input type="text" id="latitude" name="coordinates[latitude]" class="full-width" value="" /&gt;  &lt;/p&gt;  &lt;p&gt;          &lt;label for="longitude"&gt;Longitude:&lt;/label&gt;&lt;br /&gt;      &lt;input type="text" id="longitude" name="coordinates[longitude]" class="full-width" value="" /&gt;  &lt;/p&gt;   For whatever reason, I liked the idea of having a singular postmeta entry for each metabox. On the save_post hook, I save the data like so:  update_post_meta($post_id, '_coordinates', $_POST['coordinates']);   I did this because I have three metaboxes and I like just having 3 postmeta values for each post; however, I've now realized a potential issue with this. I may want to use WP_Query to only pull out certain posts based these meta values. For instance, I may want to get all posts that have latitude values above 50. If I had this data in the database individually, perhaps using the key latitude, I would do something like:  $args = array(     'post_type' =&gt; 'my-post-type',     'meta_query' =&gt; array(         array(             'key' =&gt; 'latitude',             'value' =&gt; '50',             'compare' =&gt; '&gt;'         )     )  ); $query = new WP_Query( $args );   Since I have the latitude as part of the _coordinates postmeta, this would not work.  So, my question is, is there a way to utilize meta_query to query a serialized array like I have in this scenario? Prove by induction. How do I prove $\sum\limits_{i=0}^n2^i=2^{n+1}-1$ with induction? $\displaystyle\sum_{i=0}^n2^i=2^{n+1}-1$.  I don't understand induction so I could use some help. There is an image in the Wikipedia about the :    I have a rough understanding of the stress tensor: you imagine cutting out a tiny cube from the fluid and form a matrix out of the forces on each side of it: it's not hard to see that the forces that push the faces outwards so the x direction of the force on the x side, the y direction of the force on the y side, etc. is the pressure, while other forces directions are the shear stress (these can be non-zero is some jelly-like substance).  Now the first question: Why is the lower half of the spatial part is the momentum flux, while only the upper one is the shear stress on the image? Is the image wrong? Isn't the spatial part describe the classical stress tensor?   The second question is: what's the intuition behind the temporal part?  So if I have a Minkowski spacetime and cut out a cube of it, then it's quite hard to see why "pressure" on the temporal face means density, also why "shear stresses" on the temporal face translate to momentum density, not speaking of the "temporal force components" the spatial faces...  Also stresses are measured in Pascals, mass density is measured in $kg/m^3$ while momentum density is in the units of $Ns/m^3$. These units doesn't seem to be compatible, but still they are in the same matrix, why?  EDIT: It has been pointed out that momentum flux refer to the entire blue part, it indeed have a lighter frame I didn't notice. Then yet another subquestion: what's the difference between the momentum density and momentum flux? How long can I store soaked beans before cooking? Let $G$ be a group and $H$ a subgroup with $[G:H]=n$. Is it true that $x^n\in H$ for all $x\in G$?   Remarks. The answer is positive whenever $H$ is normal, e.g., for $n=2$. In general, by using the normal core of $H$, one can find an $m\ge 1$ such that $x^m\in H$ for all $x\in G$. Is there a prime which is the form of $10^n + 1$ except $2, 11, 101$? Is there a prime which is the form of $10^n + 1$ except $2, 11, 101$?  I confirm there isn't such prime for $n &lt; 64$. Note: This is a canonical post created so that we can close the many similar questions as duplicates as discussed in .   We have created a logo for a client and they love it. We've already started preparing the materials that will feature the new logo.   However, after we had created the logo, we found a logo for another company that looks eerily similar. We did not intentionally create the new logo to look like the one of the other company, in fact we didn't even know it existed beforehand, but it does regardless.  What should we do? Is this plagiarism? Can our client use the logo we have created? Should they? Or do we need to come up with another logo that's more different? How can I recover my external hard drive's free space? I had these partitions on an external hard drive:  /dev/disk2 (external, physical):    #:                       TYPE NAME                    SIZE       IDENTIFIER    0:      GUID_partition_scheme                        *2.0 TB     disk2    1:                        EFI EFI                     209.7 MB   disk2s1    2:                  Apple_HFS Android                 63.9 GB    disk2s2    3:                  Apple_HFS RiptideHUP              968.0 GB   disk2s3    4:       Microsoft Basic Data RiptideF                967.8 GB   disk2s4   My aim was to delete disk2s2 and then resize disk2s3 to occupy the leftover space by deleting disk2s2.  I deleted disk2s2 using this command:  diskutil  erasevolume  "Free Space"  ""  /dev/disk2s2   Now, to resize the volume, I used:  diskutil  resizevolume  /dev/disk2s3  R   However, I got this error:  Started partitioning on disk2s3 RiptideHUP Error: -69743: The new size must be different than the existing size   I did a bit of research and realised the free space was created before disk2s3 RiptideHUP so it cannot resize itself. Is there still a way I can reclaim the Free Space?  NOTE: Using diskutil list now shows:  /dev/disk2 (external, physical):    #:                       TYPE NAME                    SIZE       IDENTIFIER    0:      GUID_partition_scheme                        *2.0 TB     disk2    1:                        EFI EFI                     209.7 MB   disk2s1    2:                  Apple_HFS RiptideHUP              968.0 GB   disk2s3    3:       Microsoft Basic Data RiptideF                967.8 GB   disk2s4 I have a small server which I use for testing and programming. Currently it runs Debian 9.4 stretch with 4.14.0-0.bpo.3-amd64 kernel.  Today I tried to connect through SSH but I couldn't then I tried to ping it and it was unreachable. Therefore I had to hard-restart it by unplugging power cable. Then I went to  /var/log/syslog  and I found a strange line containing exactly 6140 characters like the following  ^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@  then nothing else until new log entries of system restart. This is actually the first time it happens.  Does someone know what could it be? Any idea what kind of tool should I but to fix the loose left crank on my bike? I found this  but not sure if it's gonna suit. Or is it enough to buy only nut driver? Earning a PhD help you learn tools and techniques in your field, and lets you become an expert in a very specific field of science. However, once you get your degree and try to enter the labor market, you're competing against people who are younger than you (i.e. recently graduated non-phd engineers) and may have actual work experience (i.e. non-phd engineers with a few years in the market).  There are, of course, some positions in which they cannot compete, including research and teaching position. Those are the minority, though... in most other fields it seems that holding a PhD is not as important as (for example) work experience.  So, I would like to know:   Is work experience more important than having a PhD in the many work environments? What skills can I acquire/demonstrate during my PhD to become more "valuable" than a non-PhD candidate for the same job? Vertical space in lists What is the best way to globally change the amount of vertical space between items in list environments? Please do not "lie" that the Community user "modified" the question If the Community user bumps a question, It says It has modified it:    However, It did not really modify the question, It rather just visited it. The word "modified" is a bit unfortunate IMHO because it suggests that something changed in the question or its answers, which is not true. I therefore suggest that we look for another word which would be more descriptive and less confusing. Some come to my (and others') mind:   visited, poked, bumped, promoted, dredged up, brought up, ...   (Actually, "Bumped" is even officially used now:  and .)  I'm not a native speaker and maybe someone find a better word. To me, visited sounds the best, but that may be only me. It makes sense, too, since Community really just visits the questions, with the site-effect of them getting bumped. It shouldn't confuse anybody.  Actually, it can be harmful in some sense, since , and it is interesting to know that this has happened, so that more people can check that the edit makes sense. You therefore can't simply ignore all "edited by Community" messages. (Thanks to Monica Cellio for pointing it out.)  (Remark: I know this has been questioned before (    ) but I think it has never been requested to change the action title to something more descriptive. If I'm wrong, I apologize.) (The "lying" it the question title is meant as a sarcasm)