Host is alive or not

Here is a simple shell programming which will check whether a host is alive or not

The code:

               #!/bin/bash
               a=<hostname>
               ping -c2 $a >/dev/null
               if [ $? = 0 ] 2>/dev/null; then
               echo "Host is alive"
               else
               ech0 "Host is not alive"
               fi
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