path=/www/wwwroot/123.com/_________________log/123.com.log

path2=/www/wwwroot/123.com/_________________log/123.com.log_`date -d "1 day ago" +"%Y-%m-%d_%H%M%S.log"`

#复制

cp ${path} ${path2}

#清空原内容

: > /www/wwwroot/123.com/_________________log/123.com.log