Command-Line Tools for Troubleshooting Linux-Based OS Network Issues

While working on a Linux-based OS, a technician experiences an issue accessing some servers and some sites by name.

Which of the following command-line tools should the technician use to assist in troubleshooting?

A.

dig

B.

iptables

C.

ifconfig

D.

traceroute.

A.

The command-line tool that the technician should use to troubleshoot the issue with accessing servers and sites by name is the "dig" command.

The "dig" command is a DNS lookup utility that can be used to query DNS servers for information about domain names, IP addresses, and other DNS-related information. It can be used to troubleshoot DNS resolution issues by querying DNS servers directly and analyzing the results.

To use the "dig" command, the technician can open a terminal window and enter "dig" followed by the name of the server or site they are trying to access. The output will include information about the DNS servers that were queried, the IP addresses associated with the name, and other information such as TTL values and record types.

By analyzing the output of the "dig" command, the technician can determine whether there is an issue with DNS resolution or whether the problem lies elsewhere. For example, if the "dig" command returns an error indicating that the DNS server could not be reached, the technician may need to investigate network connectivity or firewall settings.

In contrast, the "iptables" command is a Linux-based firewall utility, the "ifconfig" command is used to configure network interfaces, and the "traceroute" command is used to trace the path of network packets between two hosts. While these commands can be useful in troubleshooting network issues, they are not directly related to DNS resolution and may not be the best tools to use in this particular situation.