some examples of simple bash scripts

#!/bin/sh

result=$( grep 'packet loss' dummy |
awk '{  first=match($0,"[0-9]+%")
    last=match($0," packet loss")
    s=substr($0,first,last-first)
    print s, last}' )

echo $result


----------------------
#there is a file named: dummy
#with the content: "There is 100% packet loss at node 1".
#possibly other lines

#note by wzy: first=11; last=15
Answer: 100%