A veces, con muchos comandos, por ejemplo sort, tail, cat, read, o muchos otros programas que leen datos de un fichero que luego procesan, tenemos la necesidad de utilizarlos con la entrada estándar del sistema, ya sea para hacer una prueba rápida, evitar tener que escribir un fichero o cualquier otra cosa.
Pero podemos estar introduciendo texto para esos comandos de forma indefinida:
$sort
estrella
mar
troglodita
alienígena
carpa
kiosko
gatillo
…
¿La forma de dejar de introducir texto? Control-D es un EOF de la stdin para el comando en cuestión que estemos ejecutando.
Eso sí, Control-D, también vale para cerrar la sesión, y si nos aficionamos mucho a utilizarlo, tal vez nos llevemos algún disgusto si la pulsamos cuando no debemos. Para ello podemos escribir en el terminal:
$ set -o ignoreeof
Así cuando pulsemos Control-D a destiempo nos dirá que para cerrar el shell escribamos exit.
Por supuesto esta línea anteriormente descrita podemos escribirla en ~/.bashrc y no tendremos que escribirla más.
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