Linux Administration Handbook, Second Edition

19.12. Exercises

E19.1	You are troubleshooting a network problem and netstat -rn gives you the following output. What is the problem and what command would you use to fix it? Destination   Gateway      Genmask       Flags MSS  Window irtt  Iface128.138.202.0 0.0.0.0      255.255.255.0 U      40  0         0  eth0127.0.0.0     0.0.0.0      255.0.0.0     U      40  0         0  lo
E19.2	Write a script that monitors a given set of machines and notifies an administrator by email if a machine becomes unresponsive to pings for some set amount of time. Don’t hard-code the list of machines, the notification email address, or the ...