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What is the best way to ensure only one instance of a Bash script is running? [duplicate]

...st way to ensure only one instance of a given script is running - assuming it's Bash on Linux? 14 Answers ...
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Is int[] a reference type or a value type?

...n array to a function to check something. Should I just pass the array, as it will just pass the reference of it, or should I pass it as ref? ...
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Isn't it silly that a tiny favicon requires yet another HTTP request? How can I put the favicon into

... that these browsers still can't: Safari iOS Safari Firefox for Android With the above in mind, we can now use SVG Favicons with a reasonable degree of confidence. 2) Present the SVG as a Data URI The main objective here is to avoid HTTP Requests. As other solutions on this page have mentioned, a...
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How to prevent a background process from being stopped after closing SSH client in Linux

...ight, so I thought I could do that by starting the process in background (with an ampersand at the end of the command) and redirecting stdout to a file. ...
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How to output numbers with leading zeros in JavaScript [duplicate]

I can round to x amount of decimal places with math.round but is there a way to round left of the decimal? for example 5 becomes 05 if I specify 2 places ...
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What is NODE_ENV and how to use it in Express?

...pular by the express web server framework. When a node application is run, it can check the value of the environment variable and do different things based on the value. NODE_ENV specifically is used (by convention) to state whether a particular environment is a production or a development environme...
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What is an AngularJS directive?

I have spent quite a lot of time reading through AngularJS documentation and several tutorials, and I have been quite surprised at how unapproachable the documentation is. ...
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Argument list too long error for rm, cp, mv commands

...follow | edited May 21 '18 at 16:34 Triforcey 39433 silver badges1010 bronze badges answe...
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How to make node.js require absolute? (instead of relative)

...nd what about: var myModule = require.main.require('./path/to/module'); It requires the file as if it were required from the main js file, so it works pretty well as long as your main js file is at the root of your project... and that's something I appreciate. ...
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Is the SQL WHERE clause short-circuit evaluated?

Are boolean expressions in SQL WHERE clauses short-circuit evaluated ? 14 Answers 1...