Tutorial by Topics: gnu

GnuPG is a sophisticated key management system which allows for secure signing or encrypting data. GPG is a command-line tool used to create and manipulate GnuPG keys. GnuPG is most widely used for having SSH (Secure Shell) connections without password or any means of interactive authentication, wh...
This section provides an overview of what gnuplot is, and why a developer might want to use it. It should also mention any large subjects within gnuplot, and link out to the related topics. Since the Documentation for gnuplot is new, you may need to create initial versions of those related topic...
Send email verification to logged in user's email address on file. Firebase allows you to customize what your email entails When email hits user's email account, the user clicks on Using your Router of choice (used angular-ui-router in above example), intercept parameters in the URL. Chew the p...
In this topic we propose a simple method to correctly design simple digital circuits with VHDL. The method is based on graphical block diagrams and an easy-to-remember principle: Think hardware first, code VHDL next It is intended for beginners in digital hardware design using VHDL, with a limited...
A column is NULL when it has no value, regardless of the data type of that column. A column should never be compared to NULL using this syntax a = NULL as the result would be UNKNOWN. Instead use a IS NULL or a IS NOT NULL conditions. NULL is not equal to NULL. To compare two expressions where null...
The fit command can fit a user-defined function to a set of data points (x,y) or (x,y,z), using an implementation of the nonlinear least-squares (NLLS) Marquardt-Levenberg algorithm. Any user-defined variable occurring in the function body may serve as a fit parameter, but the return type of the fu...
Ada's standard packages provide for output of all numeric types. The format of output can be adjusted in many ways. Note how each time a generic package is instantiated with a numeric type. Also, there are both defaults to be set for the whole instance, and also ways to override Width, say, wh...
To quote from @SnoringFrog's topic-creation request: "One of the biggest gotchas using sed is scripts that fail (or succeed in an unexpected way) because they were written for one and not the other. Simple run-down of the more major differences would be good." macOS uses the BSD ver...
The GNU C compiler comes with some cool features that are not specified by the C standards. These extensions are heavily used in system software and are a great tool for performance optimization.

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