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How to Set Environment Variables Permanently in Windows, Linux, and Mac

In this article, I will show you how to set environment variables (permanently) in Windows, Linux, and Mac. Firstly, why is this useful? Often,...

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How can I determine the size of a directory or folder in Linux?

du -hs /path/to/directory -h: human-readable -s: summary (don't show size of each individual file within the...

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Tutorial: How to use Linux Screen

A problem that often arises when you’re dealing with lots of data is that it takes forever to process. So you SSH into your Amazon EC2 machine,...

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Automation: For loops in bash (for loops on the command line)

If you have to run a script that processes data for a particular file for a particular day, i.e. your file is on hadoop with the date in the path,...