Shell Programming Examples: Difference between revisions

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Line 6: Line 6:
  do
  do
     ping ${subnet}.${i} 2 1>/dev/null 2>&1
     ping ${subnet}.${i} 2 1>/dev/null 2>&1
     if [ $? -ne 0 ] ; then
     if   [ $? -ne 0 ] ; then
      echo "${subnet}.${i},down"
        echo "${subnet}.${i},down"
     else echo "${subnet}.${i},up"
     else echo "${subnet}.${i},up"
     fi
     fi
     i=$(expr $i + 1 )
     i=$(expr $i + 1 )
  done
  done

Revision as of 10:05, 22 September 2011

Ping all hosts in a subnet

subnet=”141.93.169
i=1
while [ $i -lt 255 ]       
do
   ping ${subnet}.${i} 2 1>/dev/null 2>&1
   if   [ $? -ne 0 ] ; then
        echo "${subnet}.${i},down"
   else echo "${subnet}.${i},up"
   fi
   i=$(expr $i + 1 )
done