New user, command not found problem

I loaded 2.7 from Cd and have it working and I am now trying to get usb wifi module working.
I found instruction to type "lsub" to see what it reports but i get the error "command not found"
I tried other commands and get the same error even when I precede with sudo.
I though I might need a utilities program loaded first so I tried to launch synaptic package Manager but it will not launch for some reason.
So my questions are:
- Should this command run or do I need to load some utilities program?
- Is there a reason synaptic package Manager does not launch

Thanks
George

lsusb is in the usbutils package.

sudo apt-get install usbutils

I don't know why synaptic won't load

Rick

I have linuxcnc running no problem but I want internet access for updates. The problem is I can't run the commands lsusb or ifconfig to check my connection and I can't download the utilities required because I don have internet connection. i found the package on the cdrom but can't figure out how to load it off the disk.
Synaptic package Manager will not launch from the desktop but I can run it in terminal from command line. It tries to load the utilities from the internet so I am going around in circles.
How do I get packages loaded from the disk?
I ran dos 20 years ago but have been windows ever since so I need detailed steps as I learn linux .

Thanks for your help.
George

On Debian, ifconfig is in /sbin
so you need to type

/sbin/ifconfig

to run it