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  1. or download this
    for($?=1;$?>0;`ping penn`){sleep 900}`qpage hck "penn now up"`;
    
  2. or download this
    while(`ping penn`){sleep 900}`qpage hck "penn is up"`;'
    
  3. or download this
    perl -e 'while(1){`ping penn`;if(0==$?){`qpage hck "Penn is up\!"`;exi
    +t;}sleep 900;}' &
    
  4. or download this
    perl -e 'for($?=1;$?>0;`ping penn`){sleep 900}`qpage hck "penn now up"
    +`;'
    
  5. or download this
    perl -e 'while(`ping penn`){sleep 900}`qpage hck "penn is up"`;'