wifi 8192cu tl-wn823n disabled
TP-LINK TL-WN823N Unable to connect to network
I've read that flash memories can "only" be reprogrammed 100000 to 1000000 times, until the memory storage "deteriorates"  Why exactly does this happen with flash and not other memory types, and what does "deteriorate" refer to, internally?  EDIT: Since it's not only flash that this happens, I'd like to generalize a bit and inquire about the memories that have this problem. Also, does the wearing out between these memory types occur due to the same phenomenon? What is a "year" in Westeros? Do we need to unbind event listeners in directives when angular starts to destroy? how to run the dialog command with proccess Please look on my code – ( bash script )  I want to display both dialogs on the screen on the same time,   one dialog display the:  tail –f from - /var/log/proccess1.log  ,   and the second dialog display the:  tail –f from the file - /var/log/proccess2.log     but the sad fact is that I can display only one dialog and not both dialogs ( because when I run the first dialog , the second dialog will activate only if the first dialog will killed )   So I create process on the second dialog ( ….. ) &amp;    , in order to display both dialogs    But …. the second dialog create process number but not create the second dialog GUI , ( seems that when we create dialog with process , the process not send the dialog to standard output )  So how to  run the second dialog with process but send the dialog GUI to screen ? , or other solution in order to display both dialogs on screen  My code       #!/bin/bash       # this dialog will locate the tail box on the top of the screen      dialog --begin 15 10  --tailbox   /var/log/proccess1.log  13 125         # this dialog will locate the tail box down in the screen      ( dialog --begin 37 10  --tailbox   /var/log/proccess2.log    13 125 ) &amp; How to stop apt from doing anything How to make specifics apps password protected even after passcode in iPhone? Getting a random object from NSArray without duplication What's the difference between stochastic and random? How to determine the cause of MacBook battery not charging? I see that the question &quot;why is my MacBook not charging?&quot; gets asked a lot. The problem is, there are multiple reasons. Possible points of failure are: charger, cable, magsafe connector, DC input board, logic board, battery. (Have I missed any?). What is the best sequence for a user to follow, to diagnose the problem? By way of example, here are the first steps that I usually try:  Make sure the charger is working. Either use your charger on a different Mac, or test a spare charger with your Mac.  Check the connection. There might be gunk in your port that's stopping the connector from lying flat.  Try resetting the SMC and PRAM.  If the computer boots, run Coconut Battery to determine battery status.   This is where I get a bit stuck. For example, I have a machine here that boots fine when plugged in, but not from battery. Disconnecting the MagSafe causes the machine to switch off. Sounds like it's a dead battery, except that Coconut reports the battery as detected, in good condition, but not charging. What steps should I take next? Specifically, I'm asking for a generic algorithm to help determine the source of the fault (preferably without swapping out lots of components one by one)? Biblatex citation order Monty hall problem extended. Recently I had to change the folder permissions of /usr folder. Now the whole sudo is not working. If I try to update my system using this command:  sudo apt-get update   I get the following message:  sudo: /usr/lib/sudo/sudoers.so must be only be writable by owner sudo: fatal error, unable to load plugins   So I tried to change the folder permissions by opening Nautilus as root by using this command  gksudo nautilus   But nothing happened. Nautilus didn't open. This is an emergency as the whole of sudo is not working. when I tried searching the solution from Google many suggested re-installation. I don't prefer re-installation. so is there any other solution? Suppose that $y_1(x)$ and $y_2(x)$ are solutions of the differential equation $y''+py'+qy=0$ on $I$. How can I show that if $y_1$ and $y_2$ vanish at the same point then they are not linearly independent?   Here is my attempt to prove the problem. Since $y_1(x)$ and $y_2(x)$ are solutions of the differential equation $y''+py'+qy=0$ on $I$, it is enough for me to show that the Wronskian of $y_1$ and $y_2$ denoted by $W(y_1,y_2)$ is zero. Now since $y_1$ and $y_2$ vanish at the same point say $p$ we have $y_1(p)=0$ and also $y_2(p)=0$.   Solving for $W(y_1,y_2)(p)$ we have: $y_1(p)y_2'(p)-y_2(p)y_1'(p)=0$ since $y_1(p)=0$ and also $y_2(p)=0$.   Am I correct? Thanks How to perform a full system dump/backup with a broken screen? So, yesterday my phone took a serious tumble.  It is now essentially useless, as the screen either fails to turn on, or when it does, there is nothing useful to see (just lines of primary colors, mostly).  I believe (from the fact that it still chirps at me when emails come in, etc), that the phone is still functional, otherwise.  I would like to perform a full system dump, so that I can get off any files from the phone (a TMobile SGS2 (hercules) running slimrom 4.3 build 1).  The sdcard probably isn't important, as I can just pull it, but the phone's own internal storage I should like to get a copy of.  When I plug the phone into a usb port, it 'mounts' the usb via MTP, and I can see all the files.  Unfortunately, when I do a select all | copy | paste operation, the paste op dies before transferring all files.  I've tried a couple other ADB shell operations, in hope of flipping regular USB mounting on, but nothing has worked.  Any ideas how I can get a full dump of my poor phone's contents?  Edit  Currently running a adb pull /sdcard/ ... Its copying files presently, but its too early to tell if its going to get evertying I'm expecting.  Edit #2  looks like its going to work...its taking a rather long time, but it appears to be grabbing everything I was expecting it to. In my program I have one array with 25 double values 0.04 When I try to sum these values in a loop I get following results:  0.0 + 0.04 = 0.04 0.04 + 0.04 = 0.08 0.08 + 0.04 = 0.12 0.12 + 0.04 = 0.16 0.16 + 0.04 = 0.2 0.2 + 0.04 = 0.24000000000000002 0.24000000000000002 + 0.04 = 0.28 0.28 + 0.04 = 0.32 0.32 + 0.04 = 0.36 0.36 + 0.04 = 0.39999999999999997 0.39999999999999997 + 0.04 = 0.43999999999999995 0.43999999999999995 + 0.04 = 0.4799999999999999 0.4799999999999999 + 0.04 = 0.5199999999999999 0.5199999999999999 + 0.04 = 0.5599999999999999 0.5599999999999999 + 0.04 = 0.6 0.6 + 0.04 = 0.64 0.64 + 0.04 = 0.68 0.68 + 0.04 = 0.7200000000000001 0.7200000000000001 + 0.04 = 0.7600000000000001 0.7600000000000001 + 0.04 = 0.8000000000000002 0.8000000000000002 + 0.04 = 0.8400000000000002 0.8400000000000002 + 0.04 = 0.8800000000000002 0.8800000000000002 + 0.04 = 0.9200000000000003 0.9200000000000003 + 0.04 = 0.9600000000000003   Why on earth could that happen?! How can I disable the button of my CD/DVD drive? Up until Fedora 14 I was successfully using  to enable/disable the CD/DVD eject button on my laptop (Thinkpad T410). Sadly it has stopped working now.  I've consulted the methods discussed in these 2 questions:       None of which have worked for me. So I turn back to cdctl to see if we can't fix what's broken with it, since it's worked for so long.  Debugging the issue  So starting with cdctl switches I notice that most things seem to work just fine.  Examples  These things work.  ejects the drive  $ cdctl -e   list capabilities  $ cdctl -k Tray close             : 1 Tray open              : 1 Can disable eject      : 1 Selectable spin speed  : 1 Is a jukebox           : 0 Is multisession capable: 1 Can read the MCN (UPC) : 1 Can report media change: 1 Can play audio discs   : 1 Can do a hard reset    : 1 Can report drive status: 1   According to that list cdctl even thinks that it can enable/disable the eject button.   Can disable eject      : 1    So I continue on with debugging the issue.  Debugging cdctl  So I figure lets do an strace on cdctl to see if it can shed some light on what's going on.  $ strace cdctl -o1 ... brk(0)                                  = 0x1371000 open("/dev/cdrom", O_RDONLY|O_NONBLOCK) = -1 ENOENT (No such file or directory) open("/dev/cd", O_RDONLY|O_NONBLOCK)    = -1 ENOENT (No such file or directory) open("/dev/scd0", O_RDONLY|O_NONBLOCK)  = -1 ENOENT (No such file or directory) open("/dev/sr0", O_RDONLY|O_NONBLOCK)   = 3 ioctl(3, CDROM_LOCKDOOR, 0x1)           = 0 close(3)                                = 0 exit_group(0)                           = ? +++ exited with 0 +++   Curiously it seems like cdctl thinks it's disabling the button.   $ strace cdctl -o1 ioctl(3, CDROM_LOCKDOOR, 0x1)           = 0  $ strace cdctl -o0 ioctl(3, CDROM_LOCKDOOR, 0)             = 0   NOTE: If I understand this right, the return of a 0 means it was successful.  One thing that caught my eye here was the list of devices that cdctl is attempting to interact with. So I thought "what if I try these devices with eject"?  eject command  One of the other commands I used to use years ago was the eject command to interact with the CD/DVD device. I noticed that this command also now has a similar named switch:  $ eject --help  -i, --manualeject &lt;on|off&gt;  toggle manual eject protection on/off   Example  $ eject -i 1 /dev/sr0 eject: CD-Drive may NOT be ejected with device button  $ eject -i 0 /dev/sr0 eject: CD-Drive may be ejected with device button   So eject too thinks that it's disabling the button, yet it isn't either. Using strace here I see the same system calls:  $ strace eject -i 1 /dev/sr0 |&amp; grep ioctl ioctl(3, CDROM_LOCKDOOR, 0x1)           = 0  $ strace eject -i 0 /dev/sr0 |&amp; grep ioctl ioctl(3, CDROM_LOCKDOOR, 0)             = 0   So now I'm wondering if UDEV or something else is potentially blocking or taking ownership of device?  Thoughts? Let $X$ and $Y$ be topological spaces. A function $f: X \rightarrow Y$ is defined as continuous if for each open set $U \subset Y$, $f^{-1}(U)$ is open in $X$. This definition makes sense to me when $X$ and $Y$ are metric spaces- it is equivalent to the usual $\epsilon-\delta$ definition. But why is this a good definition when $X$ and $Y$ are not metric spaces?  How should we think about this definition intuitively? Prove $\frac{1}{2}\sum_p \frac{1}{p^2}+\frac{1}{3}\sum_p \frac{1}{p^3}+\cdots$ converges Does anyone know?  And a bigger question is what happens when you encounter this maximum? Is this the same number with other Windows OSs such as Vista, XP etc.? Create an Application without a Window How would you program a C/C++ application that could run without opening a window or console?