What does chmod 755 mean?

chmod 755 means the owner has full permissions (read+write+execute = 7), while group and others have read+execute permissions (5). This is the most common permission for directories and executable scripts.

What is the difference between octal and symbolic notation?

Octal notation uses numbers (e.g., 755), where each digit represents permissions for owner, group, and others. Symbolic notation uses letters (e.g., rwxr-xr-x) where r=read, w=write, x=execute.

What are the most commonly used chmod permissions?

The most common: 644 (files readable by all, writable by owner), 755 (directories/scripts executable by all), 600 (private files, owner only), 700 (private directories, owner only).

chmod 计算器

以八进制和符号表示法计算Linux文件权限。可视化chmod命令生成器。

tools.chmodCalculator.permissions

tools.chmodCalculator.octalInput

tools.chmodCalculator.octalNotation

755

tools.chmodCalculator.symbolicNotation

rwxr-xr-x

命令

chmod 755 filename

tools.chmodCalculator.commonPresets

使用方法

以八进制和符号表示法计算Linux文件权限。可视化chmod命令生成器。

1Check the permission boxes for Owner, Group, and Others.
2View the octal (e.g., 755) and symbolic (e.g., rwxr-xr-x) notation.
3Or enter an octal number to auto-fill the checkboxes.
4Copy the chmod command to use in your terminal.

主要功能

Visual permission grid with instant calculation
Octal and symbolic notation display
Reverse lookup — enter octal to see permissions
Common presets: 644, 755, 777, 600, 700

常见问题

了解更多

Linux File Permissions and chmod Command — Complete Guide

	Read	Write	Execute	八进制
Owner				7
Group				5
Others				5