When installing SLES(SUSE Linux Enterprise Server) 12, I find the installation may corrupt other OSs. For example, I have two disks: the first(/dev/sda) has been installed the Fedora, and I want to install SLES on disk 2(/dev/sdb) :
If no attention, the SLES may occupy both disks:
The solutions is select “Create Partition Setup...“: 
Select the second disk:
Then “Next“, “Next“…. The SLES can do the partition automatically:
You can install SLES now.
When installing Suse, you can use shortcut keys(Alt + underscore alphabet). For example:
You can use ALt + O to agree the attention.
(1) In the following screen, press ESC key:
(2) In the following screen, input “linux text“, then press ENTER key:
(3) The screen is like this:
you can follow the instructions to install OS now.
On RHEL 7.0, if mountRHEL 7.1 iso and install RPM package, rpm command will complain：
[root@root Packages]# rpm -ivh xxxx.x86_64.rpm
error: xxxx.x86_64.rpm: not an rpm package (or package manifest):
So you should mount RHEL 7.0 iso, then all is OK。
Execute “make menuconfig” command, then select “General setup” -> “Local version - append to kernel release“. Add you preferred name, e.g.: “.nan“, then save it.
Check if it is saved in .config file successfully:
[root@linux]# grep -i ".nan" .config
CONFIG_LOCALVERSION=".nan"
After making sure it is saved successfully, you can execute “make” command.