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How to set environment variable for everyone under my linux system?

... man 8 pam_env man 5 pam_env.conf If all login services use PAM, and all login services have session required pam_env.so in their respective /etc/pam.d/* configuration files, then all login sessions will have some environment variables set as specified in pam_env's configuration file. On ...
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How to fix “Incorrect string value” errors?

After noticing an application tended to discard random emails due to incorrect string value errors, I went though and switched many text columns to use the utf8 column charset and the default column collate ( utf8_general_ci ) so that it would accept them. This fixed most of the errors, and made ...
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Cancel/kill window.setTimeout() before it happens

..., for example. I have a few of these that hang out for 10 seconds or more and if the user gets clicking around the action can occur at incorrect time intervals. ...
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Convert text into number in MySQL query

...ithin MySQL query? I have a column with an identifier that consists a name and a number in the format of "name-number". The column has VARCHAR type. I want to sort the rows according the number (rows with the same name) but the column is sorted according do character order, i.e. ...
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Python __call__ special method practical example

... I can use this special method, because one can simply create a new method and perform the same operation done in __call__ method and instead of calling the instance, you can call the method. ...
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Rails 3 migrations: Adding reference column?

... EDIT: This is an outdated answer and should not be applied for Rails 4.x+ You don't need to add references when you can use an integer id to your referenced class. I'd say the advantage of using references instead of a plain integer is that the model will ...
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Use different Python version with virtualenv

... edited Dec 4 '18 at 19:54 wjandrea 12.3k55 gold badges2424 silver badges4747 bronze badges answered Oct 7 '09 at 21:33 ...
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XmlWriter to Write to a String Instead of to a File

... You need to create a StringWriter, and pass that to the XmlWriter. The string overload of the XmlWriter.Create is for a filename. E.g. using (var sw = new StringWriter()) { using (var xw = XmlWriter.Create(sw)) { // Build Xml with xw. } return s...
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Java inner class and static nested class

What is the main difference between an inner class and a static nested class in Java? Does design / implementation play a role in choosing one of these? ...
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CSS transition effect makes image blurry / moves image 1px, in Chrome?

...ecially the image-rendering CSS property. For best practice accessibility and SEO wise you could replace the background image with an <img> tag using object-fit CSS property. Original answer Try this in your CSS: .your-class-name { /* ... */ -webkit-backface-visibility: hidden; ...