linux32-bit operating system supports large memory

The 32bit Linux operating system supports a maximum of 4GB of memory, so how can it support larger memory?

We need to install the operating system KENNEL-PAE kernel package, allowing the system to support PAE Physical Address Extension: http://pan.baidu.com/share/link?shareid=392468&uk= 436421975 download is the RPM installation package, if the host can surf the Internet, you can use the Yum command installation, more time-saving! Below I use Centos5.5-32bit to demonstrate:

First, check to see if the Linux system is installed to see if the Kernel-pae-devel and KERNEL-PAE packages are installed:

[[email protected] ~]# Rpm-qa |grep kernel//My test machine has installed these 2 packages

Kernel-headers-2.6.18-194.el5

Kernel-2.6.18-194.el5

Kernel-pae-2.6.18-371.11.1.el5

Kernel-devel-2.6.18-194.el5

Kernel-pae-devel-2.6.18-371.11.1.el5

1.yum Mode installation:

[[email protected] ~]# Yum install kernel-pae//directly

2. Modify the/etc/grub/guub.conf file:

[Email protected] ~]# cat/etc/grub.conf

#boot =/DEV/SDA

default=0//need to change to "0" here

Timeout=5

Splashimage= (hd0,0)/grub/splash.xpm.gz

Hiddenmenu

Title CentOS (2.6.18-371.11.1.EL5PAE)//appears this indicates that the installation of PAE succeeded

Root (hd0,0)

Kernel/vmlinuz-2.6.18-371.11.1.el5pae ro root=label=/rhgb quiet

Initrd/initrd-2.6.18-371.11.1.el5pae.img

Title CentOS (2.6.18-194.EL5)

Root (hd0,0)

Kernel/vmlinuz-2.6.18-194.el5 ro root=label=/rhgb quiet

Initrd/initrd-2.6.18-194.el5.img

3. Reboot the system:

Init6

4. View the version of kernel:

[Email protected] ~]# uname-a

Linux localhost.localdomain 2.6.18-371.11.1.el5pae #1 SMP Wed Jul 15:54:19 EDT i686 i686 i386 gnu/linux

5. View system Memory:

[Email protected] ~]# free-m

Total used free shared buffers cached//has been supported to more than 4GB!

mem:4657 549 4108 0 31 355

-/+ buffers/cache:162 4494

swap:4031 0 4031

over~

linux32-bit operating system supports large memory