nmap

 all,
>From my linux I type the following nmap -sT -vv -O xx.xx.xx.xx-xxx >
network-scan.txt I want to see whether SSHD, FTP, TELNET, RSH, RLOGIN &
TFTP are 
 running on the remote system. If they are running, I want to know which
port 
 are they running on.
I get the following error message no targets were specified,so 0 hosts
scanned,from the above the xx-xx, notation is a range of ip addresses to
scan, can you help 

Rgds.

Harry.



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