Linux and Networking Commands Basics
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Questions and Answers

What command is used to display network interfaces and IP addresses in Linux?

  • ifconfig (correct)
  • ls
  • mv
  • ping

    • Which command is used to remove files and directories in Linux?

  • cp
  • rm (correct)
  • grep
  • cd

    • What does the TCP protocol ensure when sending data over a network?

  • No error checking
  • Reliable delivery in order with error checking (correct)
  • High speed delivery
  • Unreliable delivery without error checking

    • Which protocol is commonly used for secure remote administration?

    <p>SSH</p> Signup and view all the answers

    In networking, what does the UDP protocol prioritize over TCP?

    <p>Speed and delivery order</p> Signup and view all the answers

    What is the purpose of the 'traceroute' command in networking?

    <p>Trace the route packets take to a network host</p> Signup and view all the answers

    Study Notes

    Basic Linux Commands

    • ls command lists directory contents
    • cd command changes the directory
    • pwd command prints the working directory
    • cp command copies files/directories
    • mv command moves/renames files/directories
    • rm command removes files/directories
    • chmod command changes file mode bits (permissions)
    • chown command changes file owner and group
    • grep command searches text using patterns

    Networking Commands

    • ifconfig and ip addr commands display network interfaces and IP addresses
    • ping command checks connectivity to a host
    • netstat command displays network connections, routing tables, and interface statistics
    • ss command is a utility to investigate sockets
    • traceroute command traces the route packets take to a network host
    • nslookup and dig commands query Internet name servers for DNS information

    Ports and Protocols

    • HTTP uses port 80 for web traffic
    • HTTPS uses port 443 for secure web traffic
    • FTP uses port 21 for file transfers
    • SSH uses port 22 for secure remote administration
    • SMTP uses port 25 for email sending
    • DNS uses port 53 for domain name resolution
    • DHCP uses ports 67 and 68 for network device configuration
    • RDP uses port 3389 for Windows remote desktop access

    TCP and UDP Protocols

    • TCP (Transmission Control Protocol) is a connection-oriented protocol, ensuring messages are delivered in order and checks for errors, like making a phone call
    • UDP (User Datagram Protocol) is a connectionless protocol, sending data without establishing a connection, making it faster but without guarantees for delivery or order, suitable for streaming where speed is preferred over reliability

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    Description

    Test your knowledge on basic Linux commands such as ls, cd, cp, and networking commands like ifconfig, ping, netstat. Practice using common commands for file/directory operations and network troubleshooting.

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