Problem uploading code to CJMCU TF MicroSD ATMEGA32U4 [closed] - arduino

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I am trying to learn how to program my CJMCU TF MicroSD ATMEGA32U4 which is based on Arduino Leonardo.
While I am trying to upload the code the board keeps disconnecting as soon as compiling ends and uploading starts.
I have tried different pc's and I have reinstalled Arduino IDE and all board drivers.
This is the error I keep getting:
avrdude ser_open() can't open device //COM3 no such file or directory
Thanks for helping

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Can't add authtoken to "ngrok" [closed]

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Closed 9 months ago.
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I'm new to Kali Linux and recently I tried to install ngrok, it worked perfectly but now for some reason it doesn't. I tried to create a new Authtoken and add it on Kali but it always says "ERROR: Unrecognized command: config". I've searched everywhere but I can't find a solution, please help me. Thanks in advance.
had the same problem too just a couple of hours ago fixed it by typing ngrok authtoken xxxxxxxxxxxxxxxxxxxxxxxxx (replace the x with the authcode from the ngrok dashboard)

Far 3, x64: Plugin for Secure FTP [closed]

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Closed 4 years ago.
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Windows 10 (64 bit), Far. ver.3, x64.
I can't find plugin for Secure FTP.
I need to connect by SSH to remote Linux Machine.
https://github.com/michaellukashov/Far-NetBox
Check if you have NetBox already installed (Alt+F1):
To add a connection, press Shift+F4.
I've also underlined the different tabs where one can change parameters, although usually the first tab is sufficient.

is it possible to run .R file in windows if R software is not installed in computer [closed]

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Closed 6 years ago.
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This question was caused by a typo or a problem that can no longer be reproduced. While similar questions may be on-topic here, this one was resolved in a way less likely to help future readers.
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I want to run an R script on a computer which doesn't have the R software installed on it. Is it possible to do this in any way?
If you have internet and a browser on the machine without R go to:
http://r-fiddle.org
or
http://pbil.univ-lyon1.fr/Rweb/
and paste the source of the R file into it.
Alternately, note that R is free and has an automated installer so it's pretty easy to install R on a new machine. Google for
download R windows
Download it. Run the downloaded executable and press enter for each question.

does the "set" command works in cisco switches? [closed]

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Closed 7 years ago.
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I was trying to change the default port priority on cisco switch and it came with an error as invalid input detected. can someone excplain the mistake in this code !
Switch#
Switch#set ?
<cr>
Switch#set spanning-tree ?
% Unrecognized command
Switch#set spanning-tree portvlanpriority 16
^
% Invalid input detected at '^' marker.
The Cisco prompt with the "#" means you are using a switch with IOS, but the "set" commands are for the older Cisco switches that use CatOS. You need to look up the IOS commands to accomplish what you are trying to do. The commands available for the switch will vary based on the switch model and IOS version.

How a process create in UNIX [closed]

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Closed 9 years ago.
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Can some one help me out here, it is necessary to complete my assignment.
I need to know,
how a process created in UNIX...? and
how a process created in MS-DOS...?
How is the unix process is different from MS-DOS process...?
I have fair knowledge about Operating Systems.I tried to find better answer on the internet, but I was unable to find in google, yahoo answers, etc...
Thank you........
You can do better than "the internet"...
Try:
Tannenbaum's Modern Operating Systems.
Page 735 for Linux, page 857 for Windows Vista (including MS-DOS).

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