{"id":10993,"date":"2024-03-14T13:11:25","date_gmt":"2024-03-14T13:11:25","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/what-is-the-usage-of-the-chmod-command-in-ubuntu\/"},"modified":"2025-08-04T06:20:45","modified_gmt":"2025-08-04T06:20:45","slug":"what-is-the-usage-of-the-chmod-command-in-ubuntu","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/what-is-the-usage-of-the-chmod-command-in-ubuntu\/","title":{"rendered":"Ubuntu Chmod Command: Change File Permissions"},"content":{"rendered":"

The chmod command is used to change the permissions of a file or directory. Its basic syntax is:<\/p>\n

chmod [\u9009\u9879] \u6a21\u5f0f \u6587\u4ef6\u6216\u76ee\u5f55\r\n<\/code><\/pre>\n
Common options include:<\/p>\n
    \n
  1. -R: Recursively change the permissions of a file or directory.<\/li>\n
  2. -v: Display detailed information about the modifications.<\/li>\n
  3. Display only files whose permissions have been modified.<\/li>\n<\/ol>\n
    The permissions can be represented in numerical form or symbol form. Numerical permissions are as follows:<\/p>\n
      \n
    1. No permission<\/li>\n
    2. 1: Execution rights<\/li>\n
    3. 2: Writing permission<\/li>\n
    4. 4: Read access<\/li>\n<\/ol>\n
      Different combinations of these numbers can be used to represent various levels of access. For example, 777 represents all permissions being fully open.<\/p>\n
      Symbolic forms of authority include:<\/p>\n
        \n
      1. u: owner of the file or directory<\/li>\n
      2. Group ownership of a file or directory<\/li>\n
      3. o: other users<\/li>\n
      4. a: All users<\/li>\n<\/ol>\n
        In addition, you can use “+”, “-“, and “=” to indicate increasing, decreasing, or setting permissions. For example, chmod +x file means giving the file “file” the permission to execute.<\/p>\n
        In short, the chmod command allows users to flexibly modify the permission settings of files or directories as needed.<\/p>\n","protected":false},"excerpt":{"rendered":"
        The chmod command is used to change the permissions of a file or directory. Its basic syntax is: chmod [\u9009\u9879] \u6a21\u5f0f \u6587\u4ef6\u6216\u76ee\u5f55 Common options include: -R: Recursively change the permissions of a file or directory. -v: Display detailed information about the modifications. Display only files whose permissions have been modified. The permissions can be represented […]<\/p>\n","protected":false},"author":14,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[4948,4617,5175,990,288],"class_list":["post-10993","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-chmod","tag-file-permissions","tag-linux-permissions","tag-terminal-commands","tag-ubuntu"],"yoast_head":"\nUbuntu Chmod Command: Change File Permissions - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Learn to use chmod in Ubuntu to modify file permissions. 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