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I linked to this in my previous answer, which has an enquiry form at the bottom.
This space for rent
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Sorry, now I'm looking in my mobile and I can't see the message right.
I'll see tomorrow and I' ll send any question.
I apologize for any inconvenience.
Best
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I can't do a test to see if it's a good sw to our needs.
I can't see the price
I 've seen the link. There are six videos. None is about how to do forms. I haven't got to see the way to do sheets.
I need an API or sw working in command line. I scan several documents via network scanner. This docs are the input to the API. The output must be a txt or excel file providing me the results.
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You will have to place an enquiry with them - there's a section at the bottom that deals with this.
This space for rent
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Thanks, I did itlast day. I'll wait answer.
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Hello,
I want to ask how Facebook database works like? For example if I consider only the FB posts that users put on this timeline, how that post table would work?
Some statistics.
1. There would be more than 1 million posts every second.
2. Other users may be commenting on that posts too.
Questions.
1. Is there only 1 post table or multiple posts table that contains user post based on their geographic location. This may help in reducing the load from a single post table.
2. Is Fb database has some different approach then the databases of normal (low traffic) website?
3. Every database whether Oracle or SQL server has a limit in terms of number of concurrent connection, no of inserts queries performing per second and so on. So how FB is doing this?
Hope my questions make sense. Anyone who might be in FB database team might help me in my questions?
thanks
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This is a very good topic for discussion; however, I would suggest you post it under the Database forum instead of the Uncategorized posts. Database Discussion Boards[^]
There are two kinds of people in the world: those who can extrapolate from incomplete data.
There are only 10 types of people in the world, those who understand binary and those who don't.
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Hi all, I am new in the forum. I don't know if this is the right place to say hi. If not forgive me.
I am from Spain and I like the forum, lots of topics and very useful.
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Well hello there, for anything technical, like programming questions you can ask them using a post here in forums, for anything chit chat, consider Lounge, where you can have a chat with fellow members.
The sh*t I complain about
It's like there ain't a cloud in the sky and it's raining out - Eminem
~! Firewall !~
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Welcome!   Hope you enjoy your stay. Only been here a short time but it's a great place to learn and talk with other developers.
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Can anyone help me with the Ecdh openssl command prompt code for generating shared secret. I have used this, but i got error message
openssl pkeyutl -derive -inkey musicpriv.pem -peerkey pubeckey.pem -out sharedsecret.bin | openssl dgst -sha256
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When having such problems it is always helpful to show the error message.
First step is reading the manual page for the commands and understand what they are doing:
pkeyutl(1): public key algorithm utility - Linux man page[^]
dgst(1): message digests - Linux man page[^].
You can read them also at a shell prompt by entering man pkeyutl resp. man dgst.
You should also know about shell commands (piping in your case). The pipe operator | sends the standard output of the first command to the standard input of the second. So a first check might be executing the first command only to see if the error occurs there.
You are writing the result of the first command to a file (option -out sharedsecret.bin). So the output on screen are just error or success messages. Passing these to another program using the pipe operator makes usually no sense.
So a possible solution might be omitting the output to file for the first command (untested):
openssl pkeyutl -derive -inkey musicpriv.pem -peerkey pubeckey.pem | openssl dgst -sha256
Another solution might be using the created file as input for the second command:
openssl pkeyutl -derive -inkey musicpriv.pem -peerkey pubeckey.pem -out sharedsecret.bin && openssl dgst -sha256 sharedsecret.bin
Note the usage of the && operator here. It is a shell command concatenation where the second command is only executed when the first was successful.
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Hi Jochen for the response, I use windows (not linux) and I have read through the manual page on "www.openssl.org" but i dont quite understand the basic uses of the "pkeyutl command"
This was command line used and the error message I got when I used it
openssl pkeyutl -derive -inkey musicpriv.pem -peerkey pubeckey.pem -out sharedsecret.bin | openssl dgst -sha256
Error Message = openssl:Error: 'pkeyutl' is an invalid command.
NB: Though an hash value was generated, but not as specified.
Thank you again for your great help.
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What I have said about piping and command concatenation applies also to the Windows command interpreter. So you should follow my advice about using piping or files, but not mixing them.
However, your actual problem is not related to that but occurs before.
It looks like your openssl.exe does not support the pkeyutl command.
To check this you can list the available commands:
openssl list-standard-commands
All I can suggest is to check your Windows OpenSSL installation and try to ask where you got it from.
BTW: There is no -peerkey option for the pkeyutl command (OpenSSL 1.0.1f on Ubuntu 14.04):
joe@raspi-cross:~$ openssl pkeyutl -help
Usage: pkeyutl [options]
-in file input file
-out file output file
-sigfile file signature file (verify operation only)
-inkey file input key
-keyform arg private key format - default PEM
-pubin input is a public key
-certin input is a certificate carrying a public key
-pkeyopt X:Y public key options
-sign sign with private key
-verify verify with public key
-verifyrecover verify with public key, recover original data
-encrypt encrypt with public key
-decrypt decrypt with private key
-derive derive shared secret
-hexdump hex dump output
-engine e use engine e, possibly a hardware device.
-passin arg pass phrase source
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how to create data base asp.net
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That is a perfect search machine query. Just enter it at a search page of your choice.
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Cool thank you! 
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Use sql server management studio. Very simple. Do you have a more specific question?
There are only 10 types of people in the world, those who understand binary and those who don't.
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I hope I can explain what I am after.
Let me start saying what I DO NOT NEED.
I do not need to know how to write script and execute "Hello world" in Linux "terminal".
I do not need to know to write C/C++ program using xyz editor.
I do not need to know how to option compiler / linker brand xyz.
<b>I like to learn how / why Linux compiler / linker builds a Linux directory structure ( bin , scr , etc) .
I like to learn how CMake fits into the picture</b>
( I think after some basic I can figure out how "Linux" executable gets created and run by myself)
Please - no Google it !
I can do that without assistance.
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OK, I have read not to post here because it is first forum on list , but...
I would like to talk to someone who is INTERESTED and knows something about USB.
I am not looking for code samples etc.
I have a basic USB code running on SAM3x8e / AKA Arduino Due.
Based my design on code posted here, but as it is always my case - the author of the very long article is no longer on this forum.
I have basic understanding how USB works on ATmel ARM processor.
I have test connected several USB devices and NONE of them gives SAME results.
I can reliably and repeatedly connect and reset single USB device on / to USB port.
One of the devices is USB WEB CAM and it actually sends IN packet but it is missing header.
So that is my basic question where I really could use some help from somebody knowledgeable about USB innards.
How to verify contents of packet asking for data and than verify the actual data received.
Concretely - which descriptor is the "source " sender - I have over 40 of them enumerated - including UVC descriptors.
I am sort of speak "over my head" and would appreciate if you could contribute to solution with your personal knowledge.
I am not seeking references to Google.
Been there , done that.
Thanks for your time
Vaclav
PS No "check out Arduino.cc" I am not welcomed there.
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I believe Hardware & Devices Discussion Boards[^] is the closest fit for what you are looking for.
There are only 10 types of people in the world, those who understand binary and those who don't.
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Thanks for reply.
I have not had much luck posting there either.
Cheers
Vaclav
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