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Calculate RSA key fingerprint
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Run the following command to retrieve the SHA256 fingerprint of your SSH key (-l means "list" instead of create a new key, -f means "filename"):
$ ssh-keygen -lf /path/to/ssh/key
So for example, on my machine the command I ran was (using RSA pu...
How can I measure the actual memory usage of an application or process?
...r example, Valgrind can give you insights about the amount of memory used, and, more importantly, about possible memory leaks in your program. The heap profiler tool of Valgrind is called 'massif':
Massif is a heap profiler. It performs detailed heap profiling by taking regular snapshots of a prog...
How to execute file I'm editing in Vi(m)
How to execute file that I'm editing in Vi(m) and get output in split window (like in SciTE)?
13 Answers
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What is the difference between cout, cerr, clog of iostream header in c++? When to use which one?
I tried researching the difference between cout , cerr and clog on the internet but couldn't find a perfect answer. I still am not clear on when to use which. Can anyone explain to me, through simple programs and illustrate a perfect situation on when to use which one?
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How to reverse a string in Go?
...w they force you to think about encodings.
– György Andrasek
Nov 18 '09 at 9:46
10
off-topic: wh...
How to run a shell script at startup
On an Amazon S3 Linux instance, I have two scripts called start_my_app and stop_my_app which start and stop forever (which in turn runs my Node.js application). I use these scripts to manually start and stop my Node.js application. So far so good.
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What's the difference between jQuery's replaceWith() and html()?
What's the difference between jQuery's replaceWith() and html() functions when HTML is being passed in as the parameter?
5 ...
How to get disk capacity and free space of remote computer
...ct Size,FreeSpace
$disk.Size
$disk.FreeSpace
To extract the values only and assign them to a variable:
$disk = Get-WmiObject Win32_LogicalDisk -ComputerName remotecomputer -Filter "DeviceID='C:'" |
Foreach-Object {$_.Size,$_.FreeSpace}
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Finding the max value of an attribute in an array of objects
I'm looking for a really quick, clean and efficient way to get the max "y" value in the following JSON slice:
13 Answers
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keycode 13 is for which key
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Check an ASCII table.
It stands for CR, or Carriage Return, AKA the Return key.
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