Static routes improves overall performance of your network (especially bandwidth saving). They are also useful in stub networks (i.e. there is only one link to the network). For example, each LAN (located at different offices) is connected to HQ IDC (Internet data center) using single T1/LL/Wan links.

For example under Red Hat/Fedora Linux you can add static router for eth0 network interface by editing /etc/sysconfig/network-scripts/route-eth0 file. Under Debian Linux add static route by editing /etc/network/interface file.

Display Current Routing Table Using ip command

By using the ip command, you can setup and view static route. For example, to display current routing table you can type command:
# ip route show

Sample output:

192.168.2.0/24 dev eth1 proto kernel  scope link  src 192.168.2.1
192.168.1.0/24 dev eth0  proto kernel  scope link  src 192.168.1.2
default via 192.168.1.254 dev eth0

You can add static route using following command:

ip route add {NETWORK} via {IP} dev {DEVICE}

For example network 192.168.55.0/24 available via 192.168.1.254:

# ip route add 192.168.55.0/24 via 192.168.1.254 dev eth1

Alternatively, you can use old good route command:

# route add -net 192.168.55.0 netmask 255.255.255.0 gw 192.168.1.254 dev eth1

Linux Persistence Routes

The drawback of ‘ip’ or ‘route’ command is that, when Linux reboots it will forget static routes. So store them in configuration file. Static routing describes a system that does not implement adaptive routing. In these systems routes through a data network are described by fixed paths (statically). These routes are usually entered into the router by the system administrator

Red Hat (RHEL) / CentOS / Fedora Linux Persistence Static Routing

You need to open /etc/sysconfig/network-scripts/route-eth0 file to define static routes for eth0 interface:

# cat /etc/sysconfig/network-scripts/route-eth0

Sample Output:

default 192.168.0.1 dev eth0
10.10.10.0/24 via 192.168.0.1 dev eth0
172.16.1.0/24 via 192.168.0.1 dev eth0

How do I define static routing for network 10.0.0.0/8 via 10.9.38.65 router?

Open /etc/sysconfig/network-scripts/route-eth0:

# vi /etc/sysconfig/network-scripts/route-eth0

Append following line:

10.0.0.0/8 via 10.9.38.65

Save and close the file. Restart networking:

# service network restart

Verify new routing table:

# route -n

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 2 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

I’m not surprised that Action Comics #7 (1938) sold at Heritage Auctions for $143,400, because it’s the second time Superman appeared on a comic book cover. I am surprised that the first edition of Harry Potter and the Philosopher’s Stone sold for $29,875, because it came out in 1997. Is it really that rare?

Harry Potter and the Philosopher’s Stone 1st edition sells for $29,875

One of the key elements to Buddhism, is acceptance. Only Bruce Lee can fully put that into perspective.

On March 19 the Moon will be at its closest point to Earth in 18 years: 356,577 kilometers, according to the perigee and apogee calculator. Naturally, this means that WE ARE ALL GOING TO DIE in a clusterfuck of mad hurricanes, raging volcanos, furious tsunamis and mad earthquakes. Why? Because some people have used very special instruments to detect the impending disaster in their own assfog.

Moonpocalypse Then

These fear mongers point out to all the different times in which the so-called SuperMoonbrought disaster to Earth, according to them. They say the lunar perigee caused the New England hurricane in 1938, the Hunter Valley floods in 1955, cyclone Tracy in Darwin, Australia, in 1974, and hurricane Katrina, in 2005. Oh, and the 2005 Tsunami in Indonesia, which happened two weeks before the lunar perigee, but nevermind. It’s close enough.

Of course, the Supermoon experts forgot about all the disasters that happened nowhere near the lunar perigee. You know, the disasters that keep happening all year around, every single bloody year. Where was the lunar perigee when hurricane Andrew struck Florida in 1992? Or when Haiti was reduced to shambles by the 2010 earthquake? Or during the 9.5 magnitude 1960 earthquake in Valdivia, Chile? It was on vacation, in a nice beach in Santorini, having grilled sardines and fresh white wine, that’s where.

The fact is that, if there are any disasters around March 19, they will not be caused by the Moon—which is actually progressively spiraling away from Earth at a rate of 38 millimeters per year. They will just happen because natural disasters happen. Like the astronomer Pete Wheeler—at the International Centre for Radio Astronomy—says: “There will be no earthquakes or volcanoes erupting, unless they are to happen anyway […] just a lower than usual low tide and a higher than usual high tide around the time of the event, but nothing to get excited about.”

It doesn’t matter, because there will always be some morons that, if anything happens, would say: “I told you so!” Humans like to attach explanations that seem logical to any kind of event, even while they are only logical in their brains and they are not supported by any science. In a way, it’s comforting to know that there’s a hidden reason for everything, which is why so many nincompoops believe in things like astrology and tarot cards.

But the truth is that, even while some scientists think the Moon’s gravity may trigger Earthquakes, pointing at some yet-to-be-proved correlation between full moons, new moons, and Earth, there’s no impending Moonpocalypse.

Zoombiepocalypse, on the other hand, that’s a different matter altogether.