Network Commands

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Sure! Here are some commonly used Linux networking commands:

  1. ifconfig: This command displays the network interfaces and their configurations.

  2. ip: This command displays and modifies network interfaces, routing tables, and other network settings.

  3. ping: This command tests the connectivity to a remote host by sending ICMP echo requests and receiving replies.

  4. traceroute: This command traces the route that packets take from the local host to a remote host, displaying the IP addresses of each hop along the way.

  5. netstat: This command displays network connections, routing tables, and network interface statistics.

  6. ss: This command provides similar functionality to netstat but with faster performance.

  7. route: This command displays and modifies the routing table.

  8. dig: This command performs DNS queries and displays the results.

     

    NSLOOKUP

  9. nslookup: This command performs DNS queries and displays the results.

    >>> To query a specific domain name:

    nslookup example.com

    >>> To query a specific DNS server:

    nslookup example.com server_IP_address

    >>> To query for a specific record type:

    nslookup -type=record_type example.com

     >>> To perform a reverse DNS lookup (using an IP address to find the associated domain name):

    nslookup IP_address

    >>> To perform a verbose query (showing additional information about the query):

    nslookup -debug example.com

    >>>  To set the default query type (for subsequent queries in the same session):

    nslookup
    > set type=record_type
     

    IPTABLES

  10. iptables: This command configures the Linux firewall and packet filtering rules.

    IP tables is a command-line utility in Linux-based operating systems that allows you to manage and configure the firewall rules for your system. The IP tables utility uses a set of tables and chains to filter and manipulate network traffic. Here are some basic IP tables commands:

    >>> To view the current IP tables rules:

     iptables -L

    >>> To flush all the current IP tables rules:

    iptables -F
     

    >>> To block incoming traffic from a specific IP address:

    iptables -A INPUT -s IP_address -j DROP
     

     >>> To allow incoming traffic to a specific port:

    iptables -A INPUT -p tcp --dport port_number -j ACCEPT
     

    >>> To block outgoing traffic to a specific IP address or network:

    iptables -A OUTPUT -d IP_address/network -j DROP
     

    >>> To enable Network Address Translation (NAT) for your system:

    iptables -t nat -A POSTROUTING -o interface_name -j MASQUERADE
     

    >>> To save the current IP tables rules to a file:

    iptables-save > /etc/iptables/rules.v4
     

  11. hostname: This command displays or sets the hostname of the system.

  12. ifup and ifdown: These commands bring up or down a network interface, respectively.

These are just a few examples of the many Linux networking commands available. Knowing how to use these commands can be helpful for troubleshooting network issues, configuring network settings, and monitoring network traffic.



 

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