Original address: http://blog.csdn.net/enter89/article/details/38414933
The installation is mainly divided into the following steps:
1. Download the Ubuntu 14.04 mirror software;
2. Make U disk boot disk;
3. Install Ubuntu system;
4. Create a boot system with EasyBCD.
1. Download Ubuntu 14.04
Go directly to the official website to download Ubuntu 14.04.1 LTS download address for free
PS: If the memory is more than 4G, and it is a computer with dual-core CPU, it is recommended to install a 64-bit system.
2. Make a U disk launcher
Universal-USB-Installer software for making a USB boot disk . download link
PS: Because my U disk is displayed in the hard disk area on the computer, not the normal removable storage device area, so I need to check the "Now Showing All Drives (BE CAREFUL)" item to be able to display in step3 Find the U disk drive letter in the drop-down box, and ignore the others. Click Create to write the Ubuntu system to the USB drive.
3. Install Ubuntu system
(1) To create a new hard disk space greater than 10G under Windows. Refer to the specific method .
(2) Insert the U disk into the computer, restart the computer, enter the boot interface with F12 or F8, and choose to start via USB.
(3) Enter the Ubuntu installation menu and select "Install Ubuntu".
(4) In the installation type interface, "This computer has already installed multiple operating systems, what are you going to do?", and then select the last item "Other Options", thinking that you can manually partition it yourself, click Continue.
(5) Now what we see is the partition of the hard disk. If we find the word "free" in front of it, what we need to do is to partition the free space for ubuntu.
(6) Click the "free" partition, select "Add" below, the pop-up window is as follows, fill in the partition space size on the top, fill in the partition to be mounted on the bottom, and then confirm.
Logical partition, 200M, initial, Ext4 journal file system, /boot; (boot partition 200M is enough)
Logical partition, 5000M, starting, swap space, no mount point; (swap partition, generally not larger than physical memory)
Logical partition, 160000M, starting, Ext4 log file system, /; (system partition "/" or "/root" to install system and software, more than 15G is enough)
Logical partition, remaining space, start, Ext4 log file system, /home; (home partition stores personal documents)
(7) After the partition is set, check the number of the /boot partition, and then select the number of the /boot partition in the drop-down box of "Install the device that starts the boot area", and click Install.
4. Create a boot system with EasyBCD .
1. Download EasyBCD , this software is used to select the system to enter when starting the computer. download link
2. 打开easyBCD，选择add new entry, 选择linux/BSD, name这一行随便填写，只是系统名词，写ubuntu吧，Device这一行选择刚刚我们创建的200MB的那个”/boot“分区,前边有linux标记的。如下图 PS:EasyBCD很强大，不懂的别乱搞，搞坏MBR别怪我。
3. 做完这些重启系统后，系统会将win7系统和ubuntu系统都列出来，你可以选择自己要进入的系统That's all.
PS: 当你不要ubuntu的时候，直接在window里磁盘管理删了它所在的分区，然后在Easybcd里删了它的引导就行，不影响你的windows系统，这就是为啥我不用ubuntu来引导windows的原因。