Configure Static Routes In Debian or Red Hat Enterprise Linux

Configure Static Routes In Debian or Red Hat Enterprise Linux.

Debian / Ubuntu Linux Persistence Static Routing

Open configuration file /etc/network/interfaces
# cat /etc/network/interfaces
Output:

auto eth0
iface eth0 inet static
address 192.168.1.2
netmask 255.255.255.0
gateway 192.168.1.254
up route add -net 192.168.2.0 netmask 255.255.255.0 gw 192.168.2.1
down route del -net 192.168.2.0 netmask 255.255.255.0 gw 192.168.2.1

Debian / Ubuntu Linux static routing for two interfaces:
auto lo
iface lo inet loopback

auto eth0
iface eth0 inet static
        address 10.9.38.76
        netmask 255.255.255.240
        network 10.9.38.64
        broadcast 10.9.38.79
	### static routing ###
        post-up route add -net 10.0.0.0 netmask 255.0.0.0 gw 10.9.38.65
        pre-down route del -net 10.0.0.0 netmask 255.0.0.0 gw 10.9.38.65

auto eth1
iface eth1 inet static
        address 204.186.149.140
        netmask 255.255.255.240
        network 204.186.149.128
        broadcast 204.186.149.143
        gateway 204.186.149.129
        # dns-* options are implemented by the resolvconf package, if installed
        dns-nameservers 10.0.80.11 10.0.80.12
        dns-search nixcraft.in

Updated for accuracy.

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