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Exemple Recherche les fichiers et répertoires contenant la chaîne de caractères touch. gz /bin/touch xstra> more less MORE LESS (jeu de mots sur « more or less » : less est une amélioration de more) Permettent d’afficher page par page à l’écran le contenu d’un fichier texte. La commande more est traditionnelle. Un utilisateur de Linux doit lui préférer la commande less, équivalente mais plus élaborée. less est utilisée par la commande man pour l’affichage de la documentation en ligne. © Dunod – La photocopie non autorisée est un délit.

En effet, un arrêt brutal de Linux a pour conséquence de rendre le système de fichiers incohérent. Ainsi, si vous êtes « planté », c’est-à-dire si l’une de vos applications bloque l’écran, que la combinaison de touches ne permet pas de détruire le programme, contrairement à ce que vous feriez avec le DOS, surtout n’éteignez pas l’ordinateur. Une solution existe : lancez un écran virtuel par la combinaison de touches . Dans cet écran, vous pourrez lancer des commandes de destruction de programmes et vous pourrez ainsi récupérer la main.

Xstra> cd /home/xstra/projet1 xstra> rm toto xstra> grep Recherche, dans un ou plusieurs fichiers, de toutes les lignes contenant une chaîne donnée de caractères (cette commande sera détaillée au chapitre 14). Exemple Recherche de la chaîne de caractères beau dans le fichier essai. xstra> grep beau essai Il fait beau xstra> wc Word Count Cette commande permet le dénombrement des mots, lignes et caractères dans un fichier. Un mot est défini comme une suite de caractères précédée et suivie par des espaces, des tabulations, le début ou la fin de la ligne.

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