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| { | ||
| "cells": [ | ||
| { | ||
| "cell_type": "markdown", | ||
| "metadata": {}, | ||
| "source": [ | ||
| "\n", | ||
| "\n", | ||
| "<h1><div align=\"left\">Introduction and brif history of Unix </div></h1>" | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "code", | ||
| "execution_count": 2, | ||
| "metadata": {}, | ||
| "outputs": [ | ||
| { | ||
| "data": { | ||
| "text/html": [ | ||
| "\n", | ||
| "<div align=\"center\"><iframe src=\"https://docs.google.com/presentation/d/1wK2-Kt7WfePq9aADqTB1yggx8r5Qr0mGeZdbH3VC6lw/edit?usp=sharing\" frameborder=\"0\" width=\"900\" height=\"550\" allowfullscreen=\"false\" mozallowfullscreen=\"true\" webkitallowfullscreen=\"false\"></iframe></div>" | ||
| ], | ||
| "text/plain": [ | ||
| "<IPython.core.display.HTML object>" | ||
| ] | ||
| }, | ||
| "metadata": {}, | ||
| "output_type": "display_data" | ||
| } | ||
| ], | ||
| "source": [ | ||
| "%%HTML\n", | ||
| "\n", | ||
| "<div align=\"center\"><iframe src=\"https://docs.google.com/presentation/d/1wK2-Kt7WfePq9aADqTB1yggx8r5Qr0mGeZdbH3VC6lw/edit?usp=sharing\" frameborder=\"0\" width=\"900\" height=\"550\" allowfullscreen=\"false\" mozallowfullscreen=\"true\" webkitallowfullscreen=\"false\"></iframe></div>" | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "markdown", | ||
| "metadata": {}, | ||
| "source": [ | ||
| "\n", | ||
| "# Practical\n", | ||
| "\n", | ||
| "Let's get hands on with some basic linux commands. As they say practice makes perfect. Most of this notebook is comprized of elements from the *Linux for Robotics* course offered by the construct linked here: " | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "markdown", | ||
| "metadata": {}, | ||
| "source": [ | ||
| "Open up a shell and execute the following to change into the 'src' folder in catkin directory\n", | ||
| "\n", | ||
| "```console\n", | ||
| "cd /home/user/catkin_ws/src/\n", | ||
| "```\n", | ||
| "\n", | ||
| "Then use git to clone inot the previously mentione directory\n", | ||
| "\n", | ||
| "```console\n", | ||
| "git clone https://bitbucket.org/theconstructcore/linux_course_files.git\n", | ||
| "```\n", | ||
| "\n", | ||
| "From there you should see the following displayed:\n", | ||
| "\n", | ||
| "\n", | ||
| "<img src=\"https://drive.google.com/uc?id=1KqAWzx092-vXeRHhs-hQp2csyedB54uZ\" width=\"350\" align=\"center\">" | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "markdown", | ||
| "metadata": {}, | ||
| "source": [ | ||
| "## 'tree' command to see directory tree\n", | ||
| "\n", | ||
| "Open up a shell and execute the following to change into the 'src' folder in catkin directory\n", | ||
| "\n", | ||
| "```console\n", | ||
| "tree\n", | ||
| "```\n", | ||
| "\n", | ||
| "You should see the very same directory structure as in the text editor above:\n", | ||
| "\n", | ||
| "<img src=\"https://drive.google.com/uc?id=1Dpi2jv-E7LpWqlGo6JBUkzvy760j4A0j\" WIDTH=\"300\" align=\"center\">" | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "markdown", | ||
| "metadata": {}, | ||
| "source": [ | ||
| "## 'cd' command with absolute path\n", | ||
| "\n", | ||
| "The cd command is one of the most important ones in Linux. It allows you to go into a specific directory. For instance, let's execute the following command:\n", | ||
| "\n", | ||
| "```console\n", | ||
| "cd /home/user/catkin_ws/src/linux_course_files/move_bb8_pkg/src/\n", | ||
| "```\n", | ||
| "\n", | ||
| "The command you executed has taken you directly to the folder named src, passing though many different folders on its way (user, catkin_ws, src, linux_course_files, move_bb8_pkg...)" | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "markdown", | ||
| "metadata": {}, | ||
| "source": [ | ||
| "## 'pwd' command\n", | ||
| "\n", | ||
| "pwd stands for print working directory\n", | ||
| "\n", | ||
| "```consoole\n", | ||
| "pwd\n", | ||
| "```\n", | ||
| "\n", | ||
| "Should result in the following:\n", | ||
| "\n", | ||
| "\n", | ||
| "<img src=\"https://drive.google.com/uc?id=1amRyTHMLu9xHMTq4dV8FBTITKc_7-JcZ&export=download\" align=\"center\">" | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "markdown", | ||
| "metadata": {}, | ||
| "source": [ | ||
| "## 'cd' command with relative path\n", | ||
| "\n", | ||
| "The cd command can also be used to move up a directory tree using a relative path.\n", | ||
| "Using two single dots (periods) can be used to move one directory behind relative to the directory that you are currently located.\n", | ||
| "\n", | ||
| "```console\n", | ||
| "cd ../\n", | ||
| "```\n", | ||
| "\n", | ||
| "You should now be in the following directory\n", | ||
| "\n", | ||
| "<img src=\"https://drive.google.com/uc?id=1NcpLROJf4NBN6guYjgX4fGQtAAU2c_bd&export=download\" width=\"500\" align=\"center\">" | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "markdown", | ||
| "metadata": {}, | ||
| "source": [ | ||
| "### Chaining relative paths\n", | ||
| "\n", | ||
| "It is also possible to chain the paths as following:\n", | ||
| "\n", | ||
| "```console\n", | ||
| "cd ../../\n", | ||
| "```\n", | ||
| "\n", | ||
| "<img src=\"https://drive.google.com/uc?id=16NKqVTnbhozWhwdQV7-i3J18dS-aZBbH&export=download\" width=\"500\" align=\"center\">" | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "markdown", | ||
| "metadata": {}, | ||
| "source": [ | ||
| "## 'ls' list directory contents \n", | ||
| "\n", | ||
| "The simple command ls stands for list and should give you a list of files currently in directory\n", | ||
| "\n", | ||
| "```console\n", | ||
| "ls\n", | ||
| "```\n", | ||
| "\n", | ||
| "<img src=\"https://drive.google.com/uc?id=12Z2CUE4CK5_u2-sa8rwEDb_Gip13qLrL&export=download\" width=\"500\" align=\"center\">" | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "markdown", | ||
| "metadata": {}, | ||
| "source": [ | ||
| "## 'ls -l' long list of directory contents \n", | ||
| "\n", | ||
| "The simple command ls stands for list and should give you a list of files currently in directory\n", | ||
| "\n", | ||
| "```console\n", | ||
| "ls -l\n", | ||
| "```\n", | ||
| "\n", | ||
| "The above command also has an alias or a shortcut command that can also be called to do the same thing.\n", | ||
| "\n", | ||
| "```console\n", | ||
| "ll\n", | ||
| "```\n", | ||
| "\n", | ||
| "<img src=\"https://drive.google.com/uc?id=15cX4p_WGocKn4DDj0npTbOY0lJVXdxw3&export=download\" width=\"500\" align=\"center\">" | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "markdown", | ||
| "metadata": {}, | ||
| "source": [ | ||
| "## 'ls -la' long list hidden files\n", | ||
| "\n", | ||
| "First let's go back to our home directory.\n", | ||
| "Either using cd along with a tilde or by itself and pressing enter will work.\n", | ||
| "\n", | ||
| "**Option 1:**\n", | ||
| "```console\n", | ||
| "cd ~\n", | ||
| "```\n", | ||
| "\n", | ||
| "**Option 2:**\n", | ||
| "```console\n", | ||
| "cd\n", | ||
| "```\n", | ||
| "\n", | ||
| "Now that you are in your home directory please type in ls by itself then type in the following command:\n", | ||
| "\n", | ||
| "```console\n", | ||
| "ls -la\n", | ||
| "```\n", | ||
| "\n", | ||
| "<img src=\"https://drive.google.com/uc?id=1lFlW_brQu0WRNVK4uuj34Zn-1OlyD9WW&export=download\" width=\"500\" align=\"center\">" | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "markdown", | ||
| "metadata": {}, | ||
| "source": [ | ||
| "## 'mkdir' command\n", | ||
| "\n", | ||
| "\n", | ||
| "It allows you to create a new directory. Again, let's first let's go back to our home directory.\n", | ||
| "Then type in the following:\n", | ||
| "\n", | ||
| "```console\n", | ||
| "mkdir my_folder\n", | ||
| "```\n", | ||
| "\n", | ||
| "<img src=\"https://drive.google.com/uc?id=1FwmuLoYvdAhOfQ231f7cvqtlvfwWF07e&export=download\" width=\"500\" align=\"center\">" | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "markdown", | ||
| "metadata": {}, | ||
| "source": [ | ||
| "## \"touch\" command\n", | ||
| "\n", | ||
| "There are a few ways that you can create a file within a linx operating system, however the most commonly used is with the touch command. Go inside the folder you created in the previous section, and create a new file named **my_file.txt**\n", | ||
| "\n", | ||
| "**Step 1**\n", | ||
| "```\n", | ||
| "cd ~/my_folder\n", | ||
| "```\n", | ||
| "\n", | ||
| "**Step 2**\n", | ||
| "```console\n", | ||
| "touch my_file.txt\n", | ||
| "```\n", | ||
| "\n", | ||
| "If you are cheeky you can also do both at once in the following manner.\n", | ||
| "\n", | ||
| "**Option 1**\n", | ||
| "```console\n", | ||
| "mkdir my_folder; cd ~/my_folder; touch my_file.txt\n", | ||
| "```\n", | ||
| "\n", | ||
| "**Option 2**\n", | ||
| "```console\n", | ||
| "cd ~/my_folder| touch my_file.txt\n", | ||
| "```" | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "markdown", | ||
| "metadata": {}, | ||
| "source": [ | ||
| "## \"vi\" visual editor\n", | ||
| "\n", | ||
| "We will use a command line editor that is native to Unix systems called 'vi' to edit the 'my_file.txt\" that we just created.\n", | ||
| "Type in the following command in your shell and pay attention to the very bottom of it.\n", | ||
| "\n", | ||
| "```console\n", | ||
| "vi my_file.txt\n", | ||
| "```\n", | ||
| "\n", | ||
| "<img src=\"https://drive.google.com/uc?id=1sdsKdHEnzXtAQzTMnbdBcjn2VoZzfKgG&export=download\" width=\"350\" align=\"center\">" | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "markdown", | ||
| "metadata": {}, | ||
| "source": [ | ||
| "## \"vi\" insert mode\n", | ||
| "\n", | ||
| "To actually entert text into your file you need to be in insert mode.\n", | ||
| "To get into inset mode please type the letter 'i' and that should be reflected at the very bottom also.\n", | ||
| "\n", | ||
| "<img src=\"https://drive.google.com/uc?id=1OHFcrnBhQ-uEDGmFAdaBSF_GXr4XlVTZ&export=download\" width=\"350\" align=\"center\">" | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "markdown", | ||
| "metadata": {}, | ||
| "source": [ | ||
| "## \"vi\" save and exit\n", | ||
| "\n", | ||
| "Once in \"insert mode\" please type in \"Autonomous Air Vehicle Racing\" then exit the insert mode by clicking the escape key on your keyboard.\n", | ||
| "Type the following commands to exit and save the file.\n", | ||
| "\n", | ||
| "```console\n", | ||
| ":wq\n", | ||
| "```\n", | ||
| "\n", | ||
| "or\n", | ||
| "```console\n", | ||
| ":x\n", | ||
| "```\n", | ||
| "\n", | ||
| "<img src=\"https://drive.google.com/uc?id=1po8qw_JaaC7kCdshdjanHZbiXWLEhi42&export=download\" width=\"350\" align=\"center\">" | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "markdown", | ||
| "metadata": {}, | ||
| "source": [ | ||
| "### 'mv' to move/ rename a file\n", | ||
| "\n", | ||
| "The 'mv' command quite literally stands for move and has the following structure.\n", | ||
| "This command can also be used to rename files.\n", | ||
| "\n", | ||
| "```\n", | ||
| "mv <file/folder we want to move> <destination>\n", | ||
| "```\n", | ||
| "\n", | ||
| "To re-name the file\n", | ||
| "```\n", | ||
| "mv my_file.txt renamed_file.txt\n", | ||
| "```\n", | ||
| "\n", | ||
| "Move the renamed file:\n", | ||
| "\n", | ||
| "```\n", | ||
| "mv renamed_file.txt ~/catkin_ws/src/linux_course_files/move_bb8_pkg/src\n", | ||
| "```\n", | ||
| "\n", | ||
| "Change directory into the desired workspace:\n", | ||
| "```\n", | ||
| "cd ~/catkin_ws/src/linux_course_files/move_bb8_pkg/sr\n", | ||
| "```\n", | ||
| "\n", | ||
| "Do both by chaining commands\n", | ||
| "```\n", | ||
| "mv renamed_file.txt ~/catkin_ws/src/linux_course_files/move_bb8_pkg/src;cd ~/catkin_ws/src/linux_course_files/move_bb8_pkg/sr\n", | ||
| "```\n", | ||
| "\n", | ||
| "Please type in the **ls -l** command again in order to see the files.\n", | ||
| "You'll notice that there is a difference between the colors of the files.\n", | ||
| "\n", | ||
| "\n", | ||
| "<img src=\"https://drive.google.com/uc?id=1gFzypzFD7ZyCgILrNjVcaQjSLtR0kaM_&export=download\" align=\"center\">" | ||
| ] | ||
| }, | ||
| { | ||
| "cell_type": "markdown", | ||
| "metadata": {}, | ||
| "source": [ | ||
| "## Make our BB8 move in a circle\n", | ||
| "\n", | ||
| "```shell\n", | ||
| "python move_bb8_circle.py\n", | ||
| "```\n", | ||
| "\n", | ||
| "Take a look at your windows screen." | ||
| ] | ||
| } | ||
| ], | ||
| "metadata": { | ||
| "kernelspec": { | ||
| "display_name": "Python 2", | ||
| "language": "python", | ||
| "name": "python2" | ||
| }, | ||
| "language_info": { | ||
| "codemirror_mode": { | ||
| "name": "ipython", | ||
| "version": 2 | ||
| }, | ||
| "file_extension": ".py", | ||
| "mimetype": "text/x-python", | ||
| "name": "python", | ||
| "nbconvert_exporter": "python", | ||
| "pygments_lexer": "ipython2", | ||
| "version": "2.7.16" | ||
| } | ||
| }, | ||
| "nbformat": 4, | ||
| "nbformat_minor": 5 | ||
| } |
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