Im new in unix 
so I need some help, I need a command to :
1- See all IP of the pcs are connecting to system ( my pc ), If I can find the name as in windows it will be cool !
2- See what are in the printer's queue, how to cancel and restart it.
3- How to appear the content of file in the screen.
this is what I need for now thanks for advance 
netstat -a for all incoming and outgoing connections.
Printers, I don't know.
How to "appear the file"? Depends what kind of file it is. For a text file, more filename . Space for next page, q to quit.
You can use either "lpstat -t" for the printer details, and "cancel" with the spoolid as the argment to cancel print jobs. Or start 'scoadmin' and select printers to use either the character based system, or graphical X-Windows.
You could also use 'finger' to list the currently connected clients.
Assuming the system was installed using the defaults, all the manuals are available through the web server. (http://ipaddress of SCO system)
I guess you didn't understand me !
like when I use the command " w " it appears all user and what they are doing
is they any command to show their ip too ?
output of:
$finger
What did you not understand?
Did you write that before ?
If the command is on the link you posted, the link didn't work for me !