How to get content type of a file which has no extension?
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What does this box icon represent? Since I started playing, I have seen this icon in the bottom right of my screen. Clicking it does nothing.  What does this icon represent?  I'll add a PC tag, as I'm playing on PC, and it could be related to that. crm 2011 how to hide/show the ribbon button with javascript I have used the code shown below to draw a static CMOS inverter. I have tried to use the TikZ library calc to calculate the point at which drains of the PMOS and the NMOS devices meet; and the mid-point of the line which connects the gates of the two devices. Apparently calc gets the y coordinates of the points right. However, calc seems to get the x coordinates of the points wrong. What could I be doing wrong?  Here is the TikZ code:  \documentclass{standalone} \usepackage[americaninductors]{circuitikz} \usetikzlibrary{calc} \begin{document} \begin{circuitikz} \draw % Draw MOSFETs: (0,0) node [pigfete,yscale=-1,anchor=S] (M1) {} (M1.D) node[nigfete,anchor=D] (M2) {} (M1.G)--(M2.G) % The line connecting the gates of the MOSFETs. ; % Draw the power rails: \draw ($(M1.S)-(2.0,0)$) -- (M1.S) -- ($(M1.S)+(1.2,0)$); \draw ($(M2.S)-(2.0,0)$) -- (M2.S) -- ($(M2.S)+(1.2,0)$); % Input and output nodes: \node (I) at ($0.5*(M2.G)+0.5*(M1.G)$) {}; % The mid-point between the gates. \node (O) at (M1.D) {}; % The point at which the drains of the MOSFETs are conneted. % The Input and output lines. \draw ($(I)-(.8,0)$) -- (I); \draw (O) -- ($(O)+(0.8,0)$); \end{circuitikz} \end{document}   Here is the figure that I get: Note that that input and the output lines are not connected to the rest of the circuit. Can we attribute the problem of the lines not being connected, to the rest of the circuit, to the way I am using calc? Can I have multiple DHCP servers on one network? This is a  about Redundant DHCP Servers.   Is it possible to have more than one DHCP server on the same LAN? What are the implications of doing this?    What happens if there is more than one DHCP server available? How do my clients know which one to use?  How can I have DHCP servers supplying addresses to more than one subnet\network segment? How can I configure multiple DHCP servers to supply addresses for the same subnet. Provide an easily discoverable way to get the full URL to an answer I just read a book "Linear Algebra and Its Applications 4E" by David C. Lay. The book is (should be) LaTeX typeset. The matrix and equations are so nice, please see the following 3 examples:        It's so beautiful, so I want get the same effect inside my paper. Here is my code:   \usepackage{amsmath} \usepackage{colortbl} \newcommand\y{\cellcolor{clight2}} \definecolor{clight2}{RGB}{212, 237, 244}%  %%% \[A=\left[ \begin{array}{ccccc} \y 0 &amp; -3 &amp; -6 &amp; 4 &amp; 9 \\    -1 &amp; \y -2 &amp; -1 &amp; 3 &amp; 1 \\ -2 &amp; -3 &amp; 0 &amp; \y 3 &amp; -1 \\ 1 &amp; 4 &amp; 5 &amp; -9 &amp; -7      \end{array} \right]\]  \[A=\left[\begin{array}{cccccc} \rowcolor{clight2} 3 &amp; -9 &amp; 12 &amp; -9 &amp; 6 &amp; 15\\ 0 &amp; 2 &amp; -4 &amp; 4 &amp; 2 &amp; -6 \\ 0 &amp; 3 &amp; -6 &amp; 6 &amp; 4 &amp; -5 \end{array} \right]\]   And the result:     But how to add these arrows?? How was the first log table put together? Henry Briggs compiled the first table of base-$10$ logarithms in 1617, with the help of John Napier.  My question is: how did he calculate these logarithms? How were logarithms calculated back then?  I've found   to be fairly useful, but they don't seem to say much in the way of what I'm looking for. Any answers or useful references would be appreciated. How to count the number of set bits in a 32-bit integer? How to set JAVA_HOME to point to a JDK installation? I installed sun-java6-jdk.  I need to find its home directory. JAVA_HOME must point to a JDK installation, not JRE. If I left food out of the refrigerator for some period of time, is it still safe? If I left it out too long, can I salvage it by cooking it more? Can't start mongod , configured storage engine is 'mmapv1' I try to run mongo v2.6.10 on Ubuntu 16.04 lts:  mongod   And get the result:  mongod --help for help and startup options 2017-09-16T12:15:19.660+0430 [initandlisten] MongoDB starting : pid=15959 port=27017 dbpath=/data/db 64-bit host=mahdi-MS-7808 2017-09-16T12:15:19.660+0430 [initandlisten] db version v2.6.10 2017-09-16T12:15:19.660+0430 [initandlisten] git version: nogitversion 2017-09-16T12:15:19.660+0430 [initandlisten] OpenSSL version: OpenSSL 1.0.2g  1 Mar 2016 2017-09-16T12:15:19.660+0430 [initandlisten] build info: Linux lgw01-12 3.19.0-25-generic #26~14.04.1-Ubuntu SMP Fri Jul 24 21:16:20 UTC 2015 x86_64 BOOST_LIB_VERSION=1_58 2017-09-16T12:15:19.660+0430 [initandlisten] allocator: tcmalloc 2017-09-16T12:15:19.660+0430 [initandlisten] options: {} 2017-09-16T12:15:19.660+0430 [initandlisten] exception in initAndListen: 28574 Cannot start server. Detected data files in /data/db created by storage engine 'wiredTiger'. The configured storage engine is 'mmapv1'., terminating 2017-09-16T12:15:19.660+0430 [initandlisten] dbexit:  2017-09-16T12:15:19.660+0430 [initandlisten] shutdown: going to close listening sockets... 2017-09-16T12:15:19.660+0430 [initandlisten] shutdown: going to flush diaglog... 2017-09-16T12:15:19.660+0430 [initandlisten] shutdown: going to close sockets... 2017-09-16T12:15:19.660+0430 [initandlisten] shutdown: waiting for fs preallocator... 2017-09-16T12:15:19.660+0430 [initandlisten] shutdown: lock for final commit... 2017-09-16T12:15:19.660+0430 [initandlisten] shutdown: final commit... 2017-09-16T12:15:19.660+0430 [initandlisten] shutdown: closing all files... 2017-09-16T12:15:19.660+0430 [initandlisten] closeAllFiles() finished 2017-09-16T12:15:19.660+0430 [initandlisten] dbexit: really exiting now   error :     exception in initAndListen: 28574 Cannot start server. Detected data   files in /data/db created by storage engine 'wiredTiger'. The   configured storage engine is 'mmapv1'., terminating   after update mongodb show error . How do I fix Outlook only showing the first line of every message? I'm experiencing a strange problem with Outlook 2019. When viewing a message it only shows the first line. On an HTML message, it stops at the first close paragraph tag. On a plaintext message, it stops at the first newline character. This is true if viewing a message in the reading pane as well as if double-clicking the message to open in its own window. I have the preview pane set to show 3 lines and it does show more of the message so it seems like Outlook can see more of the message than it's rendering in the reading pane. If I use View Source, the underlying data seems fine and the whole message is there. I've tried the following:  Deleting and re-creating the user's mail profile Uninstalling &amp; re-installing Office Creating a new Windows account &amp; connecting Outlook to a different Exchange account than the one that originally exhibited the problem Checked for Windows updates Checked for Office updates  Any ideas what might be causing this? I feel like I've tried everything obvious &amp; I'm striking out on Google. Show that $\textbf{ZF}$ shows $\phi$ is $\Delta_1$ Processing time/speed for Mosaic to New Raster I have a question on speeding up “Mosaic to New Raster” or finding an alternative.  After completing a suitability analysis we are trying to define movement corridors.  We used a modified CircuitScape that left 4 folders, each containing 1080 raster tiles across our study area.  We now need combine all 1080 rasters in each folder then combine these 4 combined rasters into a final raster which will be analyzed for paths.  I tried a python script that just wouldn’t work so I went on to Model Builder.  It iterates through the grids in the folder, collects the values (raster names), then mosaics all to a new raster.  It has been running for 5 days now and the results window indicates it is working.  I’m hoping it will conclude in the next day or 2.  But, we still have 3 more folders, each with 1080 rasters, that need to be mosaicked.  So….is there a way to speed up Mosaic to New Raster or is there an alternative I could use to produce the final grid?    The cell size is 270 meters, 540 x 540 columns and rows, 1 band, 32 bit floating. Fiction novel or movie about sentient dinosaurs I remember parts of a story about some researchers finding a society of sentient dinosaurs. I believe they lived underground. From what I recall there were some steam punk elements and I think crystals were important.  From what I recall (this might be wrong) there was a book and also a movie about that story.  In the process, humans lived with these dinosaurs. I am not sure if that was like that from the beginning or if that happened later.  Any idea what that story might be? Why is the decay of a neutral rho meson into two neutral pions forbidden? How to list .txt files with specific content? How do I list all .txt files with their full path that have a word 'Ubuntu' in them. Ignore non-text files. When comparing values you should ignore the case i.e. UBUNTU or ubuNtu or UbUnTu are treated as equal to the search phrase given. Does Python have a ternary conditional operator? What does the 'grep' command do? I would like to learn how to use it so I can start to use the terminal more. Conservation of energy and Doppler effect?