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What does $$ mean in the shell?

... (e.g., /tmp). It's easy to litter /tmp with symlinks that will cause your script to write somewhere undesirable. mktemp is much better. – Chris Jester-Young Sep 17 '08 at 0:11 5 ...
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What is Common Gateway Interface (CGI)?

...likely used another, specific for PHP, means of communication between your scripts and the webserver, this, as you well mention in your question, is an embedded interpreter called mod_php. So, answering your questions: What exactly is CGI? See above. Whats the big deal with /cgi-bin/*.cgi...
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Check if my app has a new version on AppStore

...isUpdateAvailable() DispatchQueue.main.async { // show alert } } catch { print(error) } } Update Using URLSession: Instead of using Data(contentsOf: url) and block a thread, we can use URLSession: func isUpdateAvailable(completion: @escaping (Bool?, E...
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I need to securely store a username and password in Python, what are my options?

I'm writing a small Python script which will periodically pull information from a 3rd party service using a username and password combo. I don't need to create something that is 100% bulletproof (does 100% even exist?), but I would like to involve a good measure of security so at the very least it w...
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How to use multiple arguments for awk with a shebang (i.e. #!)?

I'd like to execute an gawk script with --re-interval using a shebang. The "naive" approach of 10 Answers ...
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CSS scrollbar style cross browser [duplicate]

...s. FaceScroll Custom scrollbar hope it help's Edit Step 1: Add the below script to the section of your page: <link href="general.css" rel="stylesheet" type="text/css"> <script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7.1/jquery.min.js"></script&gt...
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Changing the selected option of an HTML Select element

...elements. I want to use jQuery to check each option's value against a Javascript var . If one matches, I want to set the selected attribute of that option. How would I do that? ...
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How to detect the OS from a Bash script?

...ve some OS specific aliases so I was looking for a way to determine if the script is running on Mac OS X, Linux or Cygwin . ...
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Validating parameters to a Bash script

...king if the directories exist at first, so I added that in, completing the script. Also, have addressed issues raised in comments; fixed the regular expression, switched from == to eq. This should be a portable, POSIX compliant script as far as I can tell; it doesn't use any bashisms, which is actu...
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Echo equivalent in PowerShell for script testing

I would like to output variables and values out in a PowerShell script by setting up flags and seeing the data matriculate throughout the script. ...