[praveer@praveerAMD network]$ uname -r
2.6.20-1.2312.fc5
[praveer@praveerAMD network]$ ./ser&
[1] 5287
[praveer@praveerAMD network]$ ps
  PID TTY          TIME CMD
 2732 pts/0    00:00:00 bash
 5287 pts/0    00:00:00 ser
 5288 pts/0    00:00:00 ps
[praveer@praveerAMD network]$ ./cli 
Enter message: hai
Message echoed: hai<--This is echo server(created by 04-05-0827)-->
[praveer@praveerAMD network]$ ps
  PID TTY          TIME CMD
 2732 pts/0    00:00:00 bash
 5287 pts/0    00:00:00 ser
 5291 pts/0    00:00:00 ser <defunct>
 5292 pts/0    00:00:00 ps
[praveer@praveerAMD network]$ kill -s SIGKILL 5291
[praveer@praveerAMD network]$ ps
  PID TTY          TIME CMD
 2732 pts/0    00:00:00 bash
 5287 pts/0    00:00:00 ser
 5291 pts/0    00:00:00 ser <defunct>
 5294 pts/0    00:00:00 ps