shell脚本解压多个文件

#!/bin/bash
 #查询压缩包出来，然后解压
 cd /root/
 ls *.tar.gz > ls.log
 ls *.tgz >> ls.log
 data=$(cat ls.log)
 for i in $data
   do
      #echo $i
      tar -zxf $i & > /dev/null
  done
 rm -rf ls.log