September 2024
Intermediate to advanced
726 pages
16h 30m
Spanish
Content preview from Libro de cocina bash, 2ª edición
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Capítulo 18. Trabajar más rápido tecleando menos
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A pesar de todas las mejoras en la velocidad del procesador, la velocidad de transmisión, la velocidad de la red y las capacidades de E/S, sigue habiendo un factor limitante en muchos usos de bash:la velocidad de tecleo del usuario. Por supuesto, nos hemos centrado en los scripts, pero el uso interactivo de bash sigue siendo una parte importante de su uso y utilidad. Muchas de las técnicas de scripting que hemos descrito también se pueden utilizar de forma interactiva, pero entonces te encuentras con que tienes que teclear mucho, a menos que conozcas algunos atajos.
"En aquellos tiempos", cuando se inventó Unix, había teletipos que sólo podían escribir unos 10 caracteres por segundo, y un buen mecanógrafo podía escribir más rápido de lo que el teclado era capaz. Fue en este entorno en el que se desarrolló Unix, y parte de su brevedad se debe probablemente al hecho de que nadie quería teclear más de lo absolutamente necesario para transmitir sus comandos.
En el otro extremo de la perspectiva histórica (es decir, ahora), los procesadores son tan rápidos que pueden estar bastante inactivos mientras esperan la entrada del usuario, y pueden mirar hacia atrás en los historiales de comandos anteriores así como en los directorios a lo largo de tu $PATH para encontrar posibles comandos y argumentos válidos incluso antes de ...
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