after I type in a command in to the terminal it ask for my password but when  i try to type in my password nothing happens don't know where to go from here
When I'm about to install a program in the terminal it wants the password:  [sudo] password for xxx:   But when I start to type my password nothing happens. What should I do?
How to run specific test cases in GoogleTest What is the definition of "creature" and is it used consistently? How do I set up a Cron job? Series about proxy space battles via implanted computers in kids The premise of the story is that there are 2-3 main coalitions on Earth and they fight over resources in the edges of the solar system with spaceships that are controlled from Earth by kids with computers in their heads.  If I recall correctly:   The main character's name is Tom, he starts out by conning people at some sort of gambling arcade before he is found and recruited by the "army" The Pentagon in the US has a super tall tower built in the courtyard called The Spire where most of the three books take place. The reason they need kids for this has something to do with brain elasticity and putting computers in adults causes them to go mad. All the cadets are super dismissive about learning how to program their computer aside from one girl who is super good at it. The best fighters from each side of this conflict were something of superstars, but everyone else was kept completely anonymous for their protection. There were at least 3 books last I knew, released circa 2011-2014 The third book ends with Tom being the first astronaut to Mars. The first book had a green cover, the second was yellow, and the third was red. Though I might have the order wrong. How to get the pid of the last executed command in shell script? I want to have a shell script like this:  my-app &amp; echo $my-app-pid   But I do not know how the get the pid of the just executed command.  I know I can just use the jobs -p my-app command to grep the pid. But if I want to execute the shell multiple times, this method will not work. Because the jobspec is ambiguous. When to capitalize words such as "lake", and when can the whole word be omitted? Which of the following sentences are correct?     "He gave two examples of large lakes, Lake Michigan and Lake   Superior."      "He gave two examples of large lakes, Michigan and Superior."      "He gave two examples of large Lakes, Michigan and Superior."      "He gave two examples of large lakes, Lakes Michigan and Superior."   This question is primarily about what variants are formally correct, not which one sounds the best.  I think that the question should be valid for several words of the same kind, such as mountain (Mount), figure (Figure), table (Table) and so on. Is there a proof for this Fibonacci relationship? I was looking at the decomposition of Fibonacci numbers using the definition of $F_n = F_{n-1} + F_{n-2}$, and noted the pattern in the coefficients of the terms were Fibonacci numbers. It appears to hold, and I believe it's true, but I haven't seen a proof for it. Does one exist?  $F_n = 1F_{n-1} + 1F_{n-2}$ $F_n = 2F_{n-2} + 1F_{n-3}$ $F_n = 3F_{n-3} + 2F_{n-4}$ $F_n = 5F_{n-4} + 3F_{n-5}$ etc  This can be generalized to $F_n = F_xF_{n-(x-1)}+F_{x-1}F_{n-x}$ Understanding imaginary exponents How do I identify SMD components? (or how do I identify any component) Windows OS on external hard drive Is it possible to install Windows OS to plug and play storage devices such as external hard drives, HDD enclosures (with SATA hard drives), USB flashdrives and the likes? What OS's? And if it's possible, can I boot on it after the installation/formatting?  I've read someone has tried this already using Windows XP but failed since XP reinitializes all attached USB devices before loading OS, thus disabling the External HDD that is attached via USB port.  What about other Windows OS: on Windows 7 or 8.... or Windows 10?  I'm asking this because I'm planning to create a portable OS. When I'm at my house, when I go to my grandmother's, or to a friend's place: I just simple plug that portable storage device, change the boot priority, and turn on the system and ta-da! I will only see one environment every time. Digitally selectable filter I have asked a  but I did not get an answer, as it was too specific. So I will build on it but make it a bit more broad spectrum.  I would like to make a digitally selectable BPF using transistors to select a component in the filter; resulting in the center frequency being changed.  I have used FilterPro to generate quick second order filters and get a rough filter response.  For all the designs, a Multiple-feedback was selected:  In the first picture, a center frequency at 108KHz with a bandwidth @ -3dB of 103K to 113KHz is given.    For the second, a center frequency at 117.5KHz with a bandwidth @ -3dB of 112.8K to 122.2KHz is given.    The only difference between these two circuits is R3.  If I were to implement a circuit as shown below, would it work and what transistor would be recommended? I have selected the  as the Opamp in the circuit design as that is what was used for the .    For the transistors, I was thinking of using the MOSFETs (2N7002) used in the ST7590 design as well. Story about criminal being "adjusted" which stops a man's commute I'm trying to remember the name of a story, I think the author was Larry Niven, but it might possibly be from Heinlein's "Future History" series (but a check of the stories included in the Future History indicates it's not in there), about a man whose commute is stopped because a criminal has to be 'adjusted'.  In this case, the criminal was a hit-and-run driver who left his victim untreated on the roadside, and was sentenced to suffer in the same manner. So his leg was carefully broken and he was left, untreated and in pain, on the side of the road in the same place for an hour. All the time ambulances were standing by, and every effort was made to ensure that the criminal did not suffer unduly - but that he did suffer, in a manner as close to the suffering he inflicted on his victim. I'm working with  that has X Y coordinates. They are akin to '3672187.92698000, 534175.72095400'.  I would like to convert them to longitude latitude so they are more like '-90.097017, 29.963176'.  I've seen this  however I don't have that software. I was able to download and install  but I am unfortunately perplexed by its complicated interface. Would like to do the conversion with it, if possible. I have a table with a varchar(max) column that stores text ~4-10KB in size. Data is just being added - never modified, it is a log. My problem is that a table grows too large in size - I would like to keep about 1000000 rows in this table.   I am limited to SQL Server Express and hit the limit on database size. Compression is not available in SQL Server Express and I afraid that Filestream may not be appropriate and the number of files would be too big.   What is the best solution in this case? I'm looking for a site, similar to StackOverflow, but with possibility to ask opinion based questions Since opinion based questions are not allowed neither here nor on stackoverflow, I would like to ask if any of you, know some other web page (outside Stack* ecosystem), where we can ask questions like:  "Which Java Web framework would you recommend to learn"   or any other, which by nature are opinion based.  EDIT1:  Allow me to explain a bit more - I know there are webgroups, forums and mailing lists BUT most of those are for single programming language or framework and I'm looking for something more generic. Stackoverflow is great because there are experts from all sort of programming languages and frameworks, so if it would be allowed to ask:   "Best web frameworks similar to ASP.NET MVC4"  I would get a lot of opinions, from different languages and frameworks, and that exactly what I'm looking for. Show all comments if there is just "1" extra comment to show When looking at a question or answer with comments, I think it would be better to just show that one extra comment if the threshold is "Show 1 more comment".  In other words, if there are 6 comments, show all 6 comments.  If there are 7 comments, then show 5 comments and the link "Show 2 more comments".  Etc for more comments. Trouble with gradient intuition Convert NTFS to FAT32 without losing data I understand that you can  without formatting or backing up the data and later restoring - is the same thing possible in the other direction?  I want to convert my NTFS portable hard drive to FAT32 so that my PS3 will recognise it.  If it's not possible from within Windows, are there any free programs which will allow me to do it? How to make a div 100% height of the browser window 2/15/18 compiz update broke unity This  forced removal of unity and ubuntu-desktop on my 16.04 Ubuntu system.   The offending package that is missing, but unity needs, seems to be compiz-core-abiversion-20151010. It seems to be a , and I can't find it to download.    As it happens, I mostly use LXDE on this system, but I'd be very unhappy if I used Unity...  Since I do occasionally use the Unity desktop, is there a fix for this?  Edit: related questions are rolling in. Looks like a major quality escape          Edit 2: