Hello everyone,

I'm needing some assistance with one of my course assignments. Below I have included the assignment description. I'm running my terminal on Ubuntu 9.04 (Jaunty), on a virtual machine.

Using the terminal in Linux, display the configured interfaces. Complete the following:

• Use the commands "ifconfig," "ifup," and "ifdown" to stop and start the network interface.
• Provide screenshots.

• Run the command "ping ctuonline.com."
• Run the command "nslookup google.com."
• Provide screenshots.

• Explain the usage of the commands "ifconfig," "ifup," "ifdown," "nslookup," and "ping." Provide examples of how they can be used to troubleshoot networking issues.

• Explain the use of File Transfer Protocol (FTP), Domain Name System (DNS), and Secure Shell (SSH) applications on a Linux server.

Below, I have included the code I've configured so far. I don't know where I am going wrong with this. Especially with my ifup, ifdown, ping and nslookup commands.

I don't know why my ping and nslooup commands are not working properly with my designated sites, "ctuonline" and "google". If someone could please explain this it would be a huge help!

I am not exactly certain how to get fix this and my assignment is due by tomorrow. Any help would be greatly appreciated!

Thank you



seed@seed-desktop:~$ ifconfig -a
eth8 Link encap:Ethernet HWaddr 08:00:27:65:05:ad
BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.255.255.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:31 errors:0 dropped:0 overruns:0 frame:0
TX packets:31 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:2077 (2.0 KB) TX bytes:2077 (2.0 KB)

pan0 Link encap:Ethernet HWaddr 36:d4:f0:a3:65:4f
BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)

seed@seed-desktop:~$ ifup
ifup: Use --help for help
seed@seed-desktop:~$ ifdown
ifdown: Use --help for help
seed@seed-desktop:~$ ping www.ctuonline.com
^C
seed@seed-desktop:~$ nslookup www.google.com
^C

If you have the manpages then you can use the following commands

the errors already said you could also use the help flag

But to answer the question more directly, ifup and ifdown both expect to be passed a device, which you haven't specified. That is about as much as I can give you without fully answering it, as you say this is course assignments I won't give you the answer but as you put in effort, I hope I have steered you in the right direction.

Hi anonguy and welcome to LQ.

Have you been told by your instructor to use Ubuntu 9.04? That version went end of life in OCTOBER, 2010. While it will run and for script purposes it will also run scripts, I'm not sure I advise that you continue to use this version.

Please review the LQ Rules and take note of the specific one saying:Also suggest you check the Site FAQ for information about how to use [code][/code] tags, or use the advanced edit mode and use the menu option. Any command line outputs or code should be placed within these tags.

Please note that LQ members are not here to do your work for you. You have attempted to do this, please continue, and also please note that while you have said you are showing the code you've used to do this, it really is no code at all, excepting a few command line calls.

Use the man page for these commands and do some research. Simply running a command or two, failing at those attempts, then posting a question to help you with all of this is not the best way to approach this problem.