Sense of Life

Create Permanent Static Route with Two Lan Card

Posted by vandai | Posted in Tech-News, ubuntu | Posted on 14-10-2009

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I want to create routing for my two Lan Card. First Lan Card (eth0) for Internet access, and second Lan Card (eth1) for my Intranet. So when i access internet, it will route to my eth0 by default. otherwise, with eth1 for intranet access.

Public (eth0):
IP: 201.102.21.201
Netmask: 255.255.255.241
Gateway: 201.102.21.1

Intranet (eth1):
IP: 10.1.10.24
Netmask: 255.255.255.0
Gateway: 10.1.10.1

Basic command for adding route on Linux:

route add [-net|-host] <IP/Net> netmask <Mask> gw <Gateway IP> dev <Int>X

And this is what we do:

route add -net 10.0.0.0 netmask 255.0.0.0 gw 10.1.10.1 dev eth1
route add -net default netmask 0.0.0.0 gw 201.102.21.1 dev eth0

To check the route, simply type “route” with no arguments

route

The output will seen like this:

Kernel IP routing table
Destination� � � � Gateway� � � � � � � � Genmask� � � � � � � � � � � Flags� Metric Ref� � � Use Iface
201.102.21.201� *� � � � � � � � � � � � � � 255.255.255.241� � � � U� � � � 1� � � � � � � � � 0� � � � � � � 0 eth0
10.1.10.24� � � � � � � � � � *� � � � � � � � � � � � � � 255.255.255.0� � � � � � � � � U� � � � � 1� � � � � � � � � 0� � � � � � � 0 eth1
link-local� � � � � � � � *� � � � � � � � � � � � � � 255.255.0.0� � � � � � � � � � � � � U� � � 1000� � � � 0� � � � � � � 0 eth0
10.0.0.0� � � � � � � � 10.1.10.1� � � � � � 255.0.0.0� � � � � � � � � � � � � � � � � UG� � � 0� � � � � � � � � 0� � � � � � � 0 eth1
default� � � � � � � � � � 201.102.21.1� � � 0.0.0.0� � � � � � � � � � � � � � � � � � UG� � � 0� � � � � � � � � 0� � � � � � � 0 eth0

Now, to keep this route persistent, add this lines to file /etc/networking/interfaces

up route add -net 10.0.0.0 netmask 255.0.0.0 gw 10.1.10.1 dev eth1
up route add -net default netmask 0.0.0.0 gw 201.102.21.1 dev eth0

Restart networking to confirm the changes

sudo /etc/init.d/networking restart

Other method, Create a file called defaultroute in /etc/init.d and make it executable (chmod +x /etc/init.d/defaultroute).
Add the route commands there and do this:

update-rc.d defaultroute defaults 99

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Happy Eid Mubarak 1430 H

Posted by vandai | Posted in Arsenal, For life.. | Posted on 20-09-2009

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Happy Eid Mubarak

Assalaamu’alaykum wa rahmatullah wa barakatuh

Happy Eid Mubarak 1430 H

May the Mercy & Blessing’s of the Almighty be with you, your family, and friends during this auspicious Eid Blessings Day and continue to be always, and May ALLAH (SWT) have accepted all our prayers/duas during this blessed month of Ramadhan, Insya ‘Allah.

—
Selamat Hari Raya Idul Fitri 1430 H.
Minal ‘Aidin Wal Faidzin
Mohon Maaf Lahir dan Batin.

*and happy Eid Mubarak too to Robin van Persie, Samir Nasri, And Armand Traore..

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Restore Ubuntu Boot Loader

Posted by vandai | Posted in Programming, Tech-News, ubuntu | Posted on 07-09-2009

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To repair your Ubuntu GRUB, you need Ubuntu LiveCD, boot from this CD, and open a terminal. Be a root, by typing “sudo su” and enter your password.

Find the partition which your Ubuntu system is installed.

# fdisk -l

On my machine, my Ubuntu partition is on /dev/sda3, so i’ll use this for example.

Create a mountpoint for this:

# mkdir /media/rootgrub
# mount /dev/sda3 /media/rootgrub

Check if your partition is the correct partition

# ls /media/rootgrub

if the output is not like this, then you have the wrong partition

bin dev home lib mnt root srv usr boot etc initrd lib64 opt sbin sys
var cdrom initrd.img media proc selinux tmp vmlinuz

unmount the partition if have the wrong one, then mount the others. To make sure you have the correct partition, run ls /media/root/boot, which should output something like this :

config-2.6.18-3-686 � � initrd.img-2.6.18-3-686.bak � � System.map-2.6.18-3-686
grub lost+found � � � � � vmlinuz-2.6.18-3-686 � � � � � � initrd.img-2.6.18-3-686
memtest86+.bin

Now when everything is ok, install the Grub:

# sudo grub-install –root-directory=/media/rootgrub� /dev/sda

If you have some warning, try this:

# sudo grub-install –root-directory=/media/rootgrub� /dev/sda –recheck

Change /dev/sda to other partition you want to install Grub on. If all goes fine, you will see the output like this:

Installation finished. No error reported. This is the contents of the device map /boot/grub/device.map. Check if this is correct or not. If any of the lines is incorrect, fix it and re-run the script `grub-install’.

(hd0) /dev/sda

Restart to your harddrive (not to LiveCD) and see, your GRUB should be AUTOMAGICALLY appear!

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