北漂IT民工的博客

file=”a.txt” pattern=$1 repalcement=$2 lineNumber=$3 li=`cat $file | grep -n $pattern | sed s/:/\ / | awk ‘{print$1}’ | sed -n ${lineNumber}p` li2=$((li)) echo $li2 sed “$li,${li}s/${pattern}/${repalcement}/” $file