Network configuration commands, firewall rules, and basic troubleshooting tools used on Linux systems.
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- What does the ifconfig command display?
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Network interface configuration, including IP address, netmask, and MAC address.- What is the primary purpose of the ip command?
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To view and configure network interfaces, routes, and policies on Linux systems.- What does the route command do?
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Displays and modifies the kernel routing table.- What information does netstat display?
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Network connections, listening ports, routing tables, and network statistics.- What is the ss command used for?
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To display socket statistics, including active connections and listening ports.- What is the primary purpose of ping?
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To test connectivity and measure latency between the local host and a remote host.- What does traceroute show?
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The network path taken by packets from the local host to a destination, including each intermediate hop.- What is nslookup used for?
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To query DNS servers and resolve domain names to IP addresses.- What does dig do?
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Performs DNS lookups and displays detailed DNS response information.- What is iptables?
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A command-line firewall tool that configures packet filtering rules in the Linux kernel.- What is firewalld?
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A dynamic firewall daemon that manages firewall rules using zones and services.- What is ufw?
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Uncomplicated Firewall, a front-end to iptables designed to be easier to use.- How do you view the current routing table using the ip command?
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Use: ip route show- How do you add a default route using the route command?
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Use: route add default gw <gateway-ip>- How do you remove a route using the route command?
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Use: route delete <destination> or route del <destination>
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