BİLKENT UNIVERSITY

DEPARTMENT OF COMPUTER TECHNOLOGY AND PROGRAMMING

CTP203 Operating Systems

Spring 2000

LAB ASSIGNMENT # 7

Instructor : Can Uğur Ayfer

Assistant : Ece Yargı

Date : 10-11April 2000

Week : 10

1 The UNIX “ping” command is used to check whether a TCP/IP host is accessible on the network.

e.g the command “ping 139.179.40.2” returns the message “139.179.40.2 is alive” if the host with IP number 139.179.40.2 is reachable on the TCP/IP network.

1 The UNIX “nslookup” performs a name server lookup (search) for the given IP number to find the name of the host (if there is such a host).

These command files are both located in /usr/sbin directory on host gunes.ctp.bilkent.edu.tr.

Try these commands manually and see what kind of output they produce and write a Perl script to report status for the following critical hosts of Bilkent Network:

139.179.40.1

139.179.40.2

139.179.89.2

139.179.10.13

139.179.10.6

It MUST be easy to add/remove to/from the list of hosts in this script.

The report that your script produces should be like something :

	Host          Status        Name
	============= ============= ==========
        139.179.40.1  Up/Running    temel.ctp.bilkent.edu.tr
        139.179.40.2  Down          cisco7010.ctp.bilkent.edu.tr
        etc etc       etc etc