Assuming you currently have a Centos 5 64-bit that was installed by us (if you have or want 32-bit, set/use 32-bit accordingly).
Below will reinstall to Centos 5.6 64-bit, change it accordingly if you want other versions of centos.
1. SSH to your server and login as root
2. Type below:
mkdir /centos_install cd /centos_install wget http://vault.centos.org/5.6/os/x86_64/images/pxeboot/initrd.img wget http://vault.centos.org/5.6/os/x86_64/images/pxeboot/vmlinuz cp vmlinuz /boot/vmlinuz.cent.pxe cp initrd.img /boot/initrd.img.cent.pxe
3. Add to/Edit the grub menu.lst entry to load the pxe kernel (note: if you were already using grub you do not need to type again the first 2 lines)
nano -w /etc/grub.conf
in that file paste this in BETWEEN "hiddenmenu" and "title CentOS..." (IMPORTANT):
title Centos Install (PXE) root (hd0,0) kernel /vmlinuz.cent.pxe vnc vncpassword=YOURPSW headless ip=YOURIP netmask=255.255.255.0 gateway=GATEWAYIP dns=8.8.8.8 ksdevice=eth0 method=http://vault.centos.org/5.6/os/x86_64/ lang=en_US keymap=us initrd /initrd.img.cent.pxe
replace
YOURPSW with the VNC password you want setup
YOURIP with the ip of the box…
GATEWAYIP with the gateway assigned to your box
(hd0,0) match it with what you see on the existing kernel, some server may use (hd1,0)
Hint: you can see the gateway ip by issuing
route -n | grep UG
once you have done this you need to count the number of times “title” appears in the file, press ctrl +x, and save the file
4. Reboot the server by typing
reboot
5. Assuming above is done correctly, you can then use vncviewer (download from realvnc.com) and connect to YOURIPHERE:1
And password is whatever you set above.
For Centos 6.5 64-bit, FIRST make sure you can go to http://mirror.teklinks.com/centos/6.5/ then you can use this:
mkdir /centos_install
cd /centos_install
wget http://mirror.teklinks.com/centos/6.5/os/x86_64/images/pxeboot/initrd.img
wget http://mirror.teklinks.com/centos/6.5/os/x86_64/images/pxeboot/vmlinuz
cp vmlinuz /boot/vmlinuz.cent.pxe
cp initrd.img /boot/initrd.img.cent.pxe
title Centos Install (PXE)
root (hd0,0)
kernel /vmlinuz.cent.pxe vnc vncpassword=YOURPASS headless ip=YOURIP netmask=255.255.255.0 gateway=YOURGATEWAY dns=8.8.8.8 ksdevice=eth0 method=http://mirror.teklinks.com/centos/6.5/os/x86_64/ lang=en_US keymap=us
initrd /initrd.img.cent.pxe
