Máy tính Chmod
Tính toán quyền truy cập tệp Linux
Người sở hữu
Nhóm
Công cộng
số
755
tượng trưng
rwxr-xr-x
chmod 755 filename
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What is Chmod Calculator?
Unix file permissions use an octal (base-8) number or symbolic notation to define read (r=4), write (w=2), and execute (x=1) access for the owner, group, and others. Remembering what chmod 755 or 644 means requires experience. DailyDevTools' chmod Calculator translates between octal codes, symbolic notation (rwxr-xr--), and plain English descriptions — instantly.
How to use Chmod Calculator
- 1Enter an octal code (e.g., 755, 644, 777) to see the permissions it represents
- 2Or toggle the read/write/execute checkboxes for owner, group, and others to build permissions visually
- 3See the equivalent symbolic notation (rwxr-xr-x) and what each group can do in plain English
- 4Copy the chmod command (chmod 755 filename) ready to run in your terminal
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