chmod
时间: 2023-07-04 18:26:28 浏览: 56
`chmod` is a command in Unix-based operating systems that is used to change the permissions of a file or directory. It stands for "change mode". The command allows the user to add or remove permission to read, write, or execute a file or directory for the owner, group, and others.
The general syntax of the `chmod` command is:
```
chmod [options] mode file
```
Where `mode` specifies the new permission to be set, and `file` is the name of the file or directory whose permission needs to be changed. Options can be used to modify the behavior of the command.
For example, to make a file executable for the owner and group, but not for others, you can use the following command:
```
chmod 750 myfile.sh
```
This sets the permissions as follows:
- The owner has permission to read, write, and execute the file (7)
- The group has permission to read and execute the file (5)
- Others have no permission (0)
Note that the `chmod` command requires appropriate permission to be executed.