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How do I debug Linux networking issues?

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Debugging Linux networking issues involves troubleshooting network connectivity problems on a Linux system.
  1. 1

    Check network interface status

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    Verify the status of network interfaces on the system.
    ip link show
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  2. 2

    Check IP address configuration

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    Verify the IP address configuration of the network interfaces.
    ip addr show
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  3. 3

    Check routing table

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    Verify the routing table to ensure proper routing of network traffic.
    ip route show
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  4. 4

    Check DNS configuration

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    Verify the DNS configuration to ensure proper name resolution.
    cat /etc/resolv.conf
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  5. 5

    Check firewall rules

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    Verify the firewall rules to ensure they are not blocking network traffic.
    iptables -L
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  6. 6

    Check network services status

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    Verify the status of network services like DHCP, DNS, and network manager.
    systemctl status <service_name>
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