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Editorial Team
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Asked: 2026-05-27T18:51:57+00:00

I want to ask a question about route command in Linux. I have enter

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I want to ask a question about route command in Linux. I have enter following command in Linux terminal 

> route

and got the output:

Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.1.0     *               255.255.255.0   U     1      0        0 eth0
192.168.122.0   *               255.255.255.0   U     0      0        0 virbr0
link-local      *               255.255.0.0     U     1000   0        0 eth0
default         192.168.1.1     0.0.0.0         UG    0      0        0 eth0

I don’t understand it. Does this mean that any packet with ip 192.168.1.0 will go out from * gateway?
Why is it DESTINATION written there shouldn’t it be source because the packet going out from my host have source IP of 192.168.1.0?

Can anyone explain me the meaning of this entry in terms of packet going out and coming to my host?

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1 Answer

  1. Editorial Team

    Let’s go through the lines one by one:

    Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.1.0     *               255.255.255.0   U     1      0        0 eth0

    This says that any packet with a destination of 192.168.1.0 through 192.168.1.255 will be sent out eth0 without using a gateway (unless a more-specific route overrides this one).

    Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.168.122.0   *               255.255.255.0   U     0      0        0 virbr0

    This says that any packet with a destination of 192.168.122.0 through 192.168.122.255 will be sent out virbr0 without using a gateway. (Again, unless a more-specific route overrides this one.)

    Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
link-local      *               255.255.0.0     U     1000   0        0 eth0

    This says that any packet with a link-local address will be sent out interface eth0 with no gateway.

    Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
default         192.168.1.1     0.0.0.0         UG    0      0        0 eth0

    This says that any packet to a destination without another route will be sent out eth0, using 192.168.1.1 as a gateway.

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