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chgperm is a command used in Unix and Unix-like operating systems to change the permissions of a file or directory. The syntax of the command is:

chmod [options] mode file

Where:

• options are optional parameters that modify the behavior of the command
• mode specifies the new permissions to be set on the file or directory
• file is the name of the file or directory whose permissions are to be changed

For example, to give read, write, and execute permissions to the owner of a file named "example.txt", you can use the following command:

chmod u+rwx example.txt

This command will change the permissions of "example.txt" to allow the owner to read, write, and execute the file.