{"id":1221,"date":"2025-06-05T14:43:36","date_gmt":"2025-06-05T13:43:36","guid":{"rendered":"https:\/\/workboot.fr\/ciela\/?page_id=1221"},"modified":"2025-07-03T19:25:48","modified_gmt":"2025-07-03T18:25:48","slug":"octale-binaire","status":"publish","type":"page","link":"https:\/\/workboot.fr\/ciela\/octale-binaire\/","title":{"rendered":"Octale binaire"},"content":{"rendered":"\n

on retrouve la notation octale avec la fonction chmod (unix\/linux)<\/p>\n\n\n\n

convertir 10 en binaire et en octal<\/summary>\n
D\u00e9cimal<\/th>Binaire (group\u00e9 par 3 bits)<\/th>Octal<\/th><\/tr><\/thead>
10<\/td>001 010<\/td>12<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/details>\n\n\n\n
convertir 25 en binaire et en octal<\/summary>\n
D\u00e9cimal<\/th>Binaire (group\u00e9 par 3 bits)<\/th>Octal<\/th><\/tr><\/thead>
25<\/td>000 110 001<\/td>31<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/details>\n\n\n\n
convertir 64 en binaire et en octal<\/summary>\n
D\u00e9cimal<\/th>Binaire (group\u00e9 par 3 bits)<\/th>Octal<\/th><\/tr><\/thead>
64<\/td>001 000 000<\/td>100<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/details>\n\n\n\n
convertir 100 en binaire et en octal<\/summary>\n
D\u00e9cimal<\/th>Binaire (group\u00e9 par 3 bits)<\/th>Octal<\/th><\/tr><\/thead>
100<\/td>001 100 100<\/td>144<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/details>\n\n\n\n
convertir 255 en binaire et en octal<\/summary>\n
D\u00e9cimal<\/th>Binaire (group\u00e9 par 3 bits)<\/th>Octal<\/th><\/tr><\/thead>
255<\/td>000 111 111 111<\/td>377<\/td><\/tr><\/tbody><\/table><\/figure>\n<\/details>\n\n\n\n

Avec la commande chmod<\/h2>\n\n\n\n
etudiant@ordi:~\/Works\/TP0_LINUX$ ls -lh\ntotal 12K\n-rw-rw-r-- 1 etudiant etudiant 19 juil.  2 18:36 bonjour.txt\n-rw-rw-r-- 1 etudiant etudiant 65 juil.  3 12:54 Hello\n-rw-rw-r-- 1 etudiant etudiant 84 juil.  3 19:04 lesdeux<\/code><\/pre>\n\n\n\n
extrait du man chmod<\/summary>\n
CHMOD(1) Commandes de l’utilisateur CHMOD(1)<\/p>\n\n\n\n
NOM
chmod – Modifier les bits de comportement de fichier<\/p>\n\n\n\n
SYNOPSIS
chmod [OPTION]\u2026 MODE[,MODE]\u2026 FICHIER\u2026
chmod [OPTION] \u2026 MODE-OCTAL FICHIER \u2026<\/mark>
chmod [OPTION] \u2026 –reference=FICHIER-R FICHIER \u2026<\/p>\n\n\n\n
DESCRIPTION
Cette page de manuel documente la version GNU du programme chmod. Le programme chmod modifie les bits de comportement de fichier de chacun
des fichiers indiqu\u00e9s, en suivant l’indication de mode, qui peut \u00eatre une repr\u00e9sentation symbolique des changements \u00e0 effectuer ou un
nombre octal repr\u00e9sentant le motif binaire des nouveaux bits de comportement.<\/p>\n<\/details>\n\n\n\n
chmod 777 fichier<\/code><\/pre>\n\n\n\n
sachant que le premier 7  est pour me propri\u00e9taire du fichier  (owner) (bruno)<\/p>\n\n\n\n
le 7 suivant le groupe (ici groupe bruno)<\/p>\n\n\n\n
et le dernier 7 les autres (other) en plus du group et propri\u00e8taire<\/p>\n\n\n\n
ce 7 en octal donne en binaire 111   , donc simplement Read  \/ Write \/ eXecutable<\/p>\n\n\n\n
avec ces droits  tout le monde peut lire, \u00e9crire et ex\u00e9cuter le fichier si c’est possible bien \u00e9videmment.<\/p>\n\n\n\n
ls -l\n-rwxrwxrwx   1 bruno bruno         5  5 juin  15:47  fichier\n<\/code><\/pre>\n\n\n\n
Donner la commande pour autoriser le fichier en lecture que pour le propri\u00e9taire<\/summary>\n
chmod 400 fichier<\/p>\n<\/details>\n\n\n\n
Donner la commande que le propri\u00e9taire puisse lire \u00e9crire , ne pas ex\u00e9cuter , rien pour le groupe, et juste en lecture pour pour les autres. <\/summary>\n
chmod 604 fichier<\/p>\n<\/details>\n\n\n\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
on retrouve la notation octale avec la fonction chmod (unix\/linux) Avec la commande chmod sachant que le premier 7 est pour me propri\u00e9taire du fichier (owner) (bruno) le 7 suivant […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_crdt_document":"","_uag_custom_page_level_css":"","footnotes":""},"class_list":["post-1221","page","type-page","status-publish","hentry"],"yoast_head":"\nOctale binaire - workboot<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/workboot.fr\/ciela\/octale-binaire\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Octale binaire - workboot\" \/>\n<meta property=\"og:description\" content=\"on retrouve la notation octale avec la fonction chmod (unix\/linux) Avec la commande chmod sachant que le premier 7 est pour me propri\u00e9taire du fichier (owner) (bruno) le 7 suivant […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/workboot.fr\/ciela\/octale-binaire\/\" \/>\n<meta property=\"og:site_name\" content=\"workboot\" \/>\n<meta property=\"article:modified_time\" content=\"2025-07-03T18:25:48+00:00\" \/>\n<meta name=\"twitter:label1\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/workboot.fr\\\/ciela\\\/octale-binaire\\\/\",\"url\":\"https:\\\/\\\/workboot.fr\\\/ciela\\\/octale-binaire\\\/\",\"name\":\"Octale binaire - 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