{
    "q1": {
        "type": "order", 
        "question": "\n<p>\nOrder the following <b>networking</b> utilities to match the descriptions\nbelow.\n</p>\n\n<p>\n<ol>\n\n  <li>Find the ip address of all the networking devices on the current\n  machine.</li>\n\n  <li>Find the ip address of a remote machine along with other DNS\n  records.</li>\n\n  <li>Measure the <i>latency</i> to a remote machine or check if another\n  machine is responsive.</li>\n\n  <li>Securely transfer a file from one machine to another.</li>\n\n  <li>Synchronize files between machines.</li>\n\n  <li>Download a file from a website.</li>\n\n  <li>List what ports or services are available on the current machine.</li>\n\n  <li>Scan a remote machine to see what ports are open.</li>\n\n  <li>Make arbitrary network connections to a remote machine.</li>\n\n  <li>List the machines traversed in a network connection.</li>\n\n</ol>\n</p>\n\n<p>\n<b>Note</b>: You may need to lookup additional resource for some of these commands.\n</p>\n", 
        "responses": {
            "rsync": "rsync", 
            "traceroute": "traceroute", 
            "nmap": "nmap", 
            "ip": "ip", 
            "nc": "nc", 
            "ping": "ping", 
            "ss": "ss", 
            "host": "host", 
            "curl": "curl", 
            "scp": "scp"
        }
    }, 
    "q3": {
        "type": "blank", 
        "question": "\n<p>\nUse the <code>find</code> command on the <code>/etc</code> folder on\n<code>student00.cse.nd.edu</code> to answer the following questions:\n</p>\n\n<p>\n<ol>\n\n  <li>How many files are there? ____</li>\n  \n  <li>How many directories are there? ____</li>\n  \n  <li>How many executable files are there? ____</li>\n  \n  <li>How many empty files are there? ____</li>\n\n  <li>How many files and directories have the string 'host' in the name? ____</li>\n\n</ol>\n</p>\n"
    }, 
    "q2": {
        "type": "blank", 
        "question": "<p>\nUsing some of the utilities from <b>Q1</b>, answer the following questions:\n</p>\n\n<p>\n<ol>\n\n<li>What is the <b>public</b> IP Address of <code>student00.cse.nd.edu</code>? ____</li>\n\n<li>What is the IP Address of <code>dredd.h4x0r.space</code>? ____</li>\n\n<li>How many ports are <b>open</b> on <code>dredd.h4x0r.space</code>? ____</li>\n\n<li>How many hops are there between <code>student00.cse.nd.edu</code> and <code>xavier.h4x0r.space</code>? ____</li>\n\n<li>How large is the file <a href=\"https://yld.me/raw/CoM\">https://yld.me/raw/CoM</a>? ____ bytes</li>\n\n</ol>\n</p>\n"
    }, 
    "q5": {
        "type": "multiple", 
        "question": "\n<p>\nGiven the <code>exists.sh</code> script in <b>Q4</b>, which of the\nfollowing statements are true (choose all that apply)?\n</p>\n", 
        "responses": {
            "file": "The <code>test -e</code> line checks if the file referenced by the variable exists.", 
            "extension": "The <code>#!/bin/sh</code> line specifies the file extension.", 
            "shebang": "The <code>#!/bin/sh</code> line specifies the interpreter to use when the script is executed.", 
            "variable": "The <code>test -e</code> line checks if the number referenced by the variable exists.", 
            "argument": "The <code>$1</code> represents the first argument to the script</code>.", 
            "number": "The <code>$1</code> represents the number <code>1</code>."
        }
    }, 
    "q4": {
        "type": "blank", 
        "question": "\n<p>Given the following output of <code>ls -l</code>:</p>\n\n<pre>\n-rw-r--r-- 1 pbui pbui  23 Jan 18 15:39 README.md\n-rw-r--r-- 1 pbui pbui 155 Jan 25 01:15 exists.sh\n</pre>\n\n<p>And the following script, <code>exists.sh</code>:</p>\n\n<pre>\n#!/bin/sh\n\nif test -e \"$1\"; then\n    echo \"$1 exists!\"\nelse\n    echo \"$1 does not exist!\"\nfi\n</pre>\n\n<p>\n<ol>\n<li>How would you run the script even those it is not executable? ____</li>\n<li>How would you make this script executable? ____</li>\n<li>Once this script is executable, how would you run it directly? ____</li>\n</ol>\n</p>\n"
    }, 
    "q6": {
        "type": "blank", 
        "question": "\n<p>We wish to create a new version of the <code>exists.sh</code> script in\n<b>Q4</b> with the following modifications:</p>\n\n<p>\n<ol>\n\n  <li>Use <code>[</code> instead of <code>test</code> for the conditional.</li>\n\n  <li>Check every command line argument (one at a time).</li>\n\n  <li>Return an error code (<code>1</code>) if one of the checks fails.</li>\n\n  <li>Display an error message and exit with an error if no arguments are given.</li>\n\n</ol>\n<p>\n\n<p>Fill in the missing code in the script below to complete this new\nversion of <code>exists.sh</code>:</p>\n\n<pre>\n#!/bin/sh\n\n# Check if there are no arguments\nif [ \"____\" ____ 1 ]; then\n    \u00a0\u00a0\u00a0echo \"Usage: exists.sh file0...\"\n    \u00a0\u00a0\u00a0exit ____\nfi\n\n# Check each command line argument\nEXITCODE=____\nfor arg in \"____\"; do\n    # Check if argument exists\n    if [ ____ \"____\" ]; then\n        echo \"____ exists!\"\n    else\n        echo \"____ does not exist!\"\n        EXITCODE=____\n    fi\ndone\n\nexit ____\n</pre>\n"
    }
}