echo "love CHINA" | sed -e ‘s/love/LOVE/‘ -e ‘s/CHINA/china/‘ echo "love CHINA" | sed -e ‘s/love/LOVE/‘ | sed -e ‘s/CHINA/china/‘
echo "love CHINA" | awk ‘{gsub(/love|CHINA/,"LOVE,china");{print $1}}‘
使用sed，awk将love转换成LOVE，将CHINA转换成china
原文：http://www.cnblogs.com/tangshengwei/p/5521322.html