chmod
Command Function
This command is used to change file operation permissions.
Syntax
chmod [mode] [filename]
Parameters
Table 1 Parameter description
| Parameter | Description | Value Range |
|---|---|---|
| mode | Specifies the permissions for a file or directory. The value is an octal number, representing the permission of User (owner), Group (group), or Others (other groups). | [0, 777] |
| filename | Specifies the file path. | An existing file |
Usage Guidelines
-
Specify mode to change file permissions.
-
For the files created on the FAT file system, the file permission attributes are the same as those of the mounted nodes. Currently, the node permissions include only user read and write. The group and others permissions do not take effect. In addition, only the user read and write permissions can be modified. The read and write permissions are rw and ro only. There is no such restriction for other file systems.
Note
Currently, the shell does not support this command.
Example
Change the permissions on the hello-openharmony.txt file to 644 and 777.
Output
Modify the permissions on the hello-openharmony.txt file in the /dev directory.
OHOS:/dev$ chmod 644 hello-openharmony.txt
OHOS:/dev$ ll hello-openharmony.txt
-rw-r--r-- 0 0 0 0 1970-01-01 00:00 hello-openharmony.txt
OHOS:/dev$ chmod 777 hello-openharmony.txt
OHOS:/dev$ ll hello-openharmony.txt
-rwxrwxrwx 0 0 0 0 1970-01-01 00:00 hello-openharmony.txt