Install Qt creator in UBUNTU (Manual)

Because using apt-get to install QT is not the last version, I try to install it manually.

step 1: Download file
Download the last version of QT from http://qt-project.org/downloads
For example, i download Qt Online Installer for Linux 64-bit, and then go to the download folder,
find the file "qt-linux-opensource-1.4.0-2-x86_64-online.run".

step 2: Rename file
It's with a little long name. So i rename it as "qt.run" using the command
~$ mv qt-linux-opensource-1.4.0-2-x86_64-online.run qt.run

step 3: Change the access permissions
~$ chmod -x qt.run

step 4: Run the file
~$ sudo ./qt.run

you will see the install screen like below

the you can install it step by step.