background preloader

Find & modify

Facebook Twitter

Comparez des fichiers entre eux avec diff sous Linux. I.

Comparez des fichiers entre eux avec diff sous Linux

Présentation Il est souvent utile de savoir si deux fichiers comportent des différences. Cela peut par exemple être le cas dans le cas du développement d’application ou de script mais aussi pour la comparaison de configuration par exemple. Je vais ici vous présenter la commande “diff” sous Linux ainsi que quelques une de ses fonctionnalités pour y faire le tour. II. La commande diff est par défaut présente sur la plupart des systèmes UNIX. On ne voit alors aucun retour, ce qui est normal puisque nos fichiers sont identiques (pour l’instant) ! Je modifier maintenant mon fichier f2.txt pour y insérer des lettres majuscules aléatoirement dans le message au lieu de certaines minuscules : Voici le retour que nous aurons : On voit donc que diff nous trouve une différence entre le contenu des deux fichiers. A nouveau, on peut également y joindre l’option “-s” pour avoir une confirmation textuelle que les fichiers sont identiques.

You Don’t Know Anything About Regular Expressions: A Complete Guide. Regular expressions can be scary...really scary.

You Don’t Know Anything About Regular Expressions: A Complete Guide

Fortunately, once you memorize what each symbol represents, the fear quickly subsides. If you fit the title of this article, there's much to learn! Let's get started. The key to learning how to effectively use regular expressions is to just take a day and memorize all of the symbols. This is the best advice I can possibly offer. . Yep - it's not fun, but just memorize them. You can be certain that you'll want to rip your hair out at one point or another when an expression doesn't work, no matter how much it should - or you think it should!

The next step is to learn how to actually use these symbols! In this final section, we'll review a handful of the most important JavaScript methods for working with regular expressions. This one accepts a single string parameter and returns a boolean indicating whether or not a match has been found. You're most likely already familiar with the split method.

The code above will alert a single "e. " 14 Practical Examples of Linux Find Command for Beginners. Find is one of the most frequently used Linux commands, and it offers a plethora of features in the form of command line options.

14 Practical Examples of Linux Find Command for Beginners

In this tutorial, which is aimed at beginners, we will discuss the basic usage of the command as well as some of the useful command line options it offers. NOTE: Unless otherwise specified, we will be using the following files for all our find command-related examples in this tutorial. 1. How to list all files in current directory and its subdirectories The find command lets you quickly list all the files in current directory and its subdirectories. Find Here is the output in our case: Of course, you'll have to provide the complete path if the directory whose contents you want to list is not your current directory. 2. If you want, you can use the find command to search for a specific file by its name. Find [dir-path] -name [filename] For example, the following command will search the current directory for a file named 'testfile1.txt.' find .

Here is the output.