Erle Robotics Introduction to Networking in Linux

General Networking

Question 1

This question consist on displaying network information for your workstation. You can read more in 6.2 Network configuration commands:

Introduce the command necessary to display the IP address. If you don't know the solution feel free to press solution to see the right answer:

// Introduce on IP_address the corresponding bash command line
var IP_address =

var IP_address= ip addr show;

assert(IP_address == ip addr show);

// This is context code available everywhere
// The user will be able to call magicFunc in his code
function magicFunc() {
    return 3;
}

Now type the command you should use to display the IP route.

// Introduce on IP_route the corresponding bash command line
var IP_route =

var IP_route= ip route show;

assert(IP_route == ip route show);

// This is context code available everywhere
// The user will be able to call magicFunc in his code
function magicFunc() {
    return 3;
}

Finally introduce the command that shows the nameserver.

// Introduce on Serv the corresponding bash command line
var Serv=

var Serv= hostname;

assert(Serv== hostname);

// This is context code available everywhere
// The user will be able to call magicFunc in his code
function magicFunc() {
    return 3;
}

Question 2

Suppose no DNS is available. What would you do to reach your neighbour's machine without typing the IP address all the time?:

[x] Edit /etc/hosts file.
[ ] Use ifconfig command.

If you use the ifconfig command,you will need to type the Ip address often, and that's what we want to avoid. For more info of how to edit hosts file visit chapter 6.2 Network configuration files.

Question 3

How would you permanently store proxy information for a text mode browser such as links?:

[ ] use chmod to change proxy servers permission.
[x] edit your ~/.bashrc with a export line.

You can find the answer in 7.3.1 proxy servers.

Question 4

Does your machine run a web server?How to check it?:

[ ] I check if /etc/httpd file exits.
[x] I check it using ps.

Go to 7.2.1 Server types for more info .

Question 5

You want to send to [email protected] a mail containing the doc.txt file.Please, enter the command line for doing this. You can find help in 7.4 Mail. If you don't know press solution.

// Introduce on command_line the corresponding bash command line
var command_line=

var command_line= mail [email protected] < doc.txt;

assert(command_line= mail [email protected] < doc.txt);

// This is context code available everywhere
// The user will be able to call magicFunc in his code
function magicFunc() {
    return 3;
}