Using ./board-config.sh is usually the best bet.
Thank you pretty much for your help, The resolution problem has been solved.
But I faced an error when I want to update or install a new software!, the error is:
linaro@linaro-alip:~$ sudo apt-get install putty
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following package was automatically installed and is no longer required:
Use 'apt-get autoremove' to remove it.
The following extra packages will be installed:
The following NEW packages will be installed:
0 upgraded, 2 newly installed, 0 to remove and 2 not upgraded.
1 not fully installed or removed.
Need to get 0 B/492 kB of archives.
After this operation, 1591 kB of additional disk space will be used.
Do you want to continue? [Y/n] y
Setting up pcduino-kernel (0.3) ...
cp: cannot stat ‘/mnt/uImage’: No such file or directory
dpkg: error processing package pcduino-kernel (--configure):
subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
E: Sub-process /usr/bin/dpkg returned an error code (1)
I need help please,