's/변경할원본대상형식/새로적용시킬형식/g'
perl -pi -e 's/old/new/g' *
find . -exec perl -pi -e 's/찾을문자열/바꿀문자열/g' {} \; 2>/dev/null
find . -exec perl -pi -e 's/old/new/g' {} \; 2>/dev/null
# find . -name "*.php" -exec perl -pi -e 's/utf-8/euc-kr/g' {} \;
find . -exec grep -i -l "찾을문자열" {} \; 2>/dev/null
find . | xargs grep "문자열"