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Using openssl to get the certificate from a server

...utput and also supports SNI, which is important if you are working with an HTTP server is: openssl s_client -servername example.com -connect example.com:443 \ </dev/null 2>/dev/null | openssl x509 -text The -servername option is to enable SNI support and the openssl x509 -text prints th...
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Set margin size when converting from Markdown to PDF with pandoc

...file). However, the PDF that is produced have massive margins (like this http://johnmacfarlane.net/pandoc/demo/example13.pdf ). How can I get pandoc to produce something with smaller margins? I have looked through the pandoc user guide, but haven't found anything useful. ...
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What are commit-ish and tree-ish in Git?

...adjective in order to indicate "having qualities like" or "slightly" - see http://chambers.co.uk/search/?query=ish&title=21st Hence "tree-ish" - like a "tree" .... "commit-ish" - like a "commit" eg "Mars appears like a reddish star" ("d" is doubled !); "the food on the plate was not hot, but w...
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How to print number with commas as thousands separators?

... For Python ≥3.6 Locale aware import locale locale.setlocale(locale.LC_ALL, '') # Use '' for auto, or force e.g. to 'en_US.UTF-8' '{:n}'.format(value) # For Python ≥2.7 f'{value:n}' # For Python ≥3.6 Reference Per Format Specification Mini-Language, The ',' option signals the use...
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How can one print a size_t variable portably using the printf family?

I have a variable of type size_t , and I want to print it using printf() . What format specifier do I use to print it portably? ...
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Is it unnecessary to put super() in constructor?

...matically calls it for you. If it has arguments you'll get an error. src: http://java.sun.com/docs/books/tutorial/java/IandI/super.html share | improve this answer | follow ...
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How to remove .htaccess password protection from a subdirectory

...om all You can restrict to your IP only with : Allow from x.x.x.x See : http://httpd.apache.org/docs/current/mod/mod_access_compat.html share | improve this answer | follo...
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How can I prevent the backspace key from navigating back?

...f it is. In other words: function confirmBackspaceNavigations () { // http://stackoverflow.com/a/22949859/2407309 var backspaceIsPressed = false $(document).keydown(function(event){ if (event.which == 8) { backspaceIsPressed = true } }) $(document).ke...
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java.lang.OutOfMemoryError: Java heap space

... You may want to look at this site to learn more about memory in the JVM: http://developer.streamezzo.com/content/learn/articles/optimization-heap-memory-usage I have found it useful to use visualgc to watch how the different parts of the memory model is filling up, to determine what to change. I...
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Canary release strategy vs. Blue/Green

... I have written a detailed essay on this topic here: http://blog.itaysk.com/2017/11/20/deployment-strategies-defined In my opinion, the difference is whether or not the new 'green' version is exposed to real users. If it is, then I'd call it Canary. A common way to implement C...