Today when I finished installing ubuntu,I found that I created two partitions that can't be written,I followed the Install Wizard to create them.
The soluation as follows:
1.Display all the partitions information on the machine,use the following command:
sudo fdisk -l
If you have more than two partitions(except '/' and 'swap'),you should see like this:
/dev/sda3 ...
/dev/sda4 ...
It means that you have two other partitions,they can be mount automatically when ubuntu starts,but they can't be written,olny for read.
2.Change the visit mode to allow user to write,just type the following command and execute it:
sudo chmod -R 777 /others
sudo chmod -R 777 /resource
(The situation is only for my machine configuration,it depends on.)
3.Ok,the '/others' and '/resource' can be written.