Question 1

?What is the purpose of the "sudo" command in Linux System Administration, and how is it used

Accepted Answer

The "sudo" command in Linux allows users to execute commands with elevated privileges, typically as the root user or another specified user with administrative rights. It stands for "superuser do." This is essential for performing tasks that require elevated permissions, such as installing software, modifying system configurations, or managing system services. Users can invoke "sudo" before a command to execute it with elevated privileges, after which they must authenticate with their own password (or the root password, depending on the configuration). This enhances security by limiting access to privileged operations only to authorized users.

Question 2

? How can you troubleshoot network connectivity issues in a Linux system

Accepted Answer

Troubleshooting network connectivity issues in Linux involves several steps:

Check network configuration: Verify network settings such as IP address, subnet mask, gateway, and DNS servers using commands like "ifconfig" or "ip addr show."
Ping test: Use the "ping" command to test connectivity to a known IP address, such as a router or another host on the network.
Check network interfaces: Use the "ifconfig" or "ip link show" command to verify the status of network interfaces and ensure they are up and configured correctly.
Review firewall settings: Check firewall rules using commands like "iptables" or "firewalld" to ensure they are not blocking network traffic.
Examine routing tables: Use the "route" command to view the routing table and ensure proper routing to the destination.
Inspect logs: Check system logs such as "/var/log/syslog" or "/var/log/messages" for any network-related errors or warnings that could indicate the source of the issue.
By systematically troubleshooting each potential cause, administrators can identify and resolve network connectivity problems in Linux systems effectively.

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