Laboratory work no. 2
  • E2.1 Name:


    • Unix/Linux Shell commands


  • E2.2 General presentation, purpose.


    • The laboratory experiment aims to explore Linux resources for embedded applications, respectively the use of Linux Shell components intended for configuration and interconnection operations. Exercises for using Linux commands are proposed for viewing configuration information, examining processes, assigning rights, viewing CPU parameters, etc. At the end of the laboratory, you will have relevant information about the resources of the Embedded Linux universe usable in education


  • E2.3 Resources:


    • Raspberry Pi 0-4 platforms, wifi router, Advanced IP scanner, sever SMlab


    Documentation:

  • Unix/Linux Command reference

    br
  • E2.4 Linux Sources:

    • How to compile linux Kernel
    br


  • E2.5 How to conduct/follow the experiment:

    • Common Linux commands:


    man abc - call documentation command abc
    sudo apt-get update - install/update software
    sudo apt-get install packagename - software package installation
    Processes:
    ps - Display your currently running processes
    ps-ef - Display all the currently running processes on the system
    ps-ef|grep processname # Display process information for processname
    ps aux - display background processes
    top - Display top
    processes htop - Interactive process display
    Kill pid - Process suspension by PID
    program & - Launch program/process in the background
    bg - Display processes in bg
    fg - Toggle bg-foreground
    Network:
    ifconfig -a - Show network par.interfaces and IP addresses
    ping host - Send ICMP echo request to host
    hostname -i - Display host network address
    hostname -I - Full display of IP addresses
    SD card/CPU/mem :
    df -h - Display free disk space as well as the used one
    df -i - Show free and used inodes on mounted filesystems
    fdisk -l - Display disk partition
    du -ah - Show disk space usage
    du -sh - Display disk space used by the current directory
    cat /proc/cpuinfo - Display CPU parameters
    lscpu - Display CPU parameters
    cat /proc/meminfo - Display RAM memory parameters
    cat /boot/config.txt - Display fis. configuration at boot

  • E2.6 Proposed problems:


    • 1. Analyze Linux Kernel sources and generate optimized/dedicated OS alternatives for mobile applications (can be used as SM projects).

    2. Checked the ping command;
    3. Identify the CPU parameters; br 4. Identify the RAM memory parameters;
    5. Identify the components of the Raspberry Pi zero platform.

  • E2.7 The experiment can be extended for:
    • br - Realization of embedded systems based on Linux;
    - Making the basic components for the Internet of Things universe;
    - The development of the embedded Linux universe;
    - Research Equipment;
    - Education & Research




  • E2.8 Documentary references:

    • © F. Pantilimonescu - Embedded Advanced Computer