try to use these commands <br>i hope this will help u..,,<br><br>$ sudo cp sites/default/default.settings.php sites/default/settings.php<br><br>Next, give the web server write privileges to the sites/default/settings.php  <br>
file with the command:    <br>$ sudo chmod o+w sites/default/settings.php<br><br>So that the files directory can be created automatically, give the web server write privileges to the sites/default directory with the command:                        <br>
$ sudo chmod o+w sites/default<br>