Calculatrice Chmod gratuite en ligne
Interactive Linux/Unix file permission calculator.
Read (4)
Write (2)
Execute (1)
Owner
Group
Others
Numeric
Symbolic
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chmod 000 filename
Common Permissions
How to Use
- Toggle the checkboxes to set read, write, and execute permissions for Owner, Group, and Others.
- Or type a 3-digit numeric value (e.g., 755) directly.
- The symbolic notation and
chmodcommand update in real time. - Click Copy Command to copy the full chmod command.
Permission Reference
| Number | Permission | Symbol |
|---|---|---|
| 0 | No permission | --- |
| 1 | Execute only | --x |
| 2 | Write only | -w- |
| 3 | Write + Execute | -wx |
| 4 | Read only | r-- |
| 5 | Read + Execute | r-x |
| 6 | Read + Write | rw- |
| 7 | Read + Write + Execute | rwx |
Frequently Asked Questions
What does chmod 755 mean?
755 means the owner can read, write, and execute (7), while the group and others can read and execute but not write (5). This is the most common permission for directories and scripts.
What's the difference between 644 and 755?
644 (rw-r--r--) allows the owner to read/write and everyone else to read only · typical for files. 755 (rwxr-xr-x) adds execute permission · typical for directories and scripts.
Does this work for directories too?
Yes. The numeric permissions work the same way. For directories, "execute" means the ability to enter the directory and access its contents.