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# Python2.x Python os.fchown() Method [ Python OS File/Directory Methods](#) * * * ### Overview The os.fchown() method is used to change the ownership of a file. This function changes the user ID and group ID of a file specified by the file descriptor fd. Available on Unix systems. ### Syntax The syntax for the **fchown()** method is as follows: os.fchown(fd, uid, gid) ### Parameters * **fd** -- File descriptor * **uid** -- User ID of the file owner * **gid** -- Group ID of the file owner ### Return Value This method does not return any value. ### Example The following example demonstrates the use of the fchown() method: #!/usr/bin/python# -*- coding: UTF-8 -*-import os, sys, stat # Open file "/tmp/foo.txt" fd = os.open( "/tmp", os.O_RDONLY )# Set file user id to 100 os.fchown( fd, 100, -1)# Set file group id to 100 os.fchown( fd, -1, 50)print "Permission modification successful!!"# Close file os.close( fd ) Executing the above program outputs the following result: Permission modification successful!! [ Python OS File/Directory Methods](#)