Tag: Unix
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Perché Non Dovreste Fare Parsing di ‘ls’ e Cosa Utilizzare Invece
La pratica di fare parsing dell’output di `ls` in script Bash o altri ambienti shell è spesso citata come una cattiva abitudine da evitare. Anche se può sembrare un approccio semplice e diretto per ottenere un elenco di file, è soggetto a una serie di problemi che possono causare errori nei vostri script, specialmente quando…
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The Evolution of Scripting and Compiling on Modern OS Ecosystems
As we navigate the current landscape of Operating Systems, a fascinating debate emerges around the integrated programming languages and compilers that come bundled with them. Consider Debian 12, which inherently provides a range of scripting languages out of the box. But what about compilers? Historically, compilers have not been included as part of default installations…
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Elevate Your Command Line: Utilizing Comma Prefixes for Personalized Scripts
Discovering innovative methods for managing your command environment is always a step toward better efficiency. One such method, discussed back in 2009, suggests starting all of your commands with a comma. The approach, while simple, offers a myriad of advantages, particularly in preventing collisions with existing system commands and providing a convenient way to list…
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Revamping Root Access: Could SSH Replace Sudo?
Root access in Unix-like systems has always been a hot topic of debate among system administrators and security professionals. Traditionally, the ‘sudo’ command has been the go-to tool for gaining superuser permissions without logging in as root. However, a recent thought-provoking experiment suggests using SSH (Secure Shell) as an alternative method to obtain root-level permissions.…
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Optimiser l’Utilisation de la Ligne de Commande : Commencez Vos Commandes par une Virgule
Les développeurs et les adeptes de la ligne de commande cherchent constamment des moyens d’améliorer leur productivité et de réduire les erreurs potentielles lors de l’exécution des commandes. Une astuce ingénieuse qui commence à être adoptée est de faire précéder toutes les commandes personnalisées d’une virgule. Cette méthode simple peut faire des merveilles en évitant…
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Turbocharging ‘wc’: The New Frontier in Unix Word Count Optimization
When it comes to text processing on Unix systems, few utilities are as venerable as ‘wc’ (word count). This seemingly simple program is a quintessential tool used to count lines, words, and characters in files. However, recent developments have revealed new avenues for optimizing ‘wc’, thanks to advanced techniques such as state machines and SIMD…
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Boosting Performance in Unix ‘wc’ Command: Is a State Machine the Answer?
In the world of Unix utilities, few tools are as iconic as `wc`, the word count program. Enthusiasts and professionals alike rely on it for its simplicity—counting lines, words, and characters in text files. But the unassuming `wc` command is also a hotbed of innovation, spawning countless debates on optimization techniques, from state machines to…
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I Problemi del Parsing con il Comando ‘ls’ e le Soluzioni Migliori
Quando si tratta di scripting in ambiente Unix, una pratica comune ma controversa è il parsing dell’output del comando `ls`. Molti esperti ritengono che non sia una scelta sicura né affidabile. Ma perché è così problematico? Cosa si dovrebbe fare invece? Questo articolo esplorerà l’argomento in profondità , includendo commenti e osservazioni da varie discussioni online…
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Why Parsing the Output of ls is a Recipe for Disaster
It’s tempting to use the output of ls in your shell scripts because it’s straightforward and familiar. But the reality is that parsing the output of ls is a recipe for disaster. The primary reason is that `ls` output isn’t designed to be reliably parsed. Its layout can change based on user configurations, environment variables,…
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Apprendre les Systèmes d’Exploitation avec Xv6 : Une Introduction Ludique et Instructive
Xv6, un système d’exploitation pédagogique inspiré d’Unix et développé au MIT, offre une opportunité rare et précieuse pour ceux qui souhaitent comprendre les mécanismes internes des systèmes d’exploitation. En tant que version modernisée d’Unix V6, Xv6 est souvent utilisé dans les cours universitaires pour enseigner les concepts fondamentaux des OS. Grâce à sa simplicité, il…