shell脚本exercise2

通过文件里面的网址，判断是否访问成功网址

 #!/bin/bash
 check(){
         code=`curl -I -m  -o /dev/null -s -w %{http_code} http://$url`
         echo $code
         if [ $code -eq  ]; then
                 echo "ok"
         else
                 echo "not ok"
         fi
 }
 :<<EOF
 while read url
 do
         check
 done < url.txt
 EOF
 for url in `cat url.txt`
 do
         check
 done

防止DDoS攻击

 #!/bin/bash
 webdir=/var/www/html/
 ##校验文件内容
 md5sum -c --quiet /opt/webfile.db
 if [ $? -eq  ]; then
         echo "web dir is safely"
 else
         echo "web dir is risk"
 fi
 find $webdir -type f > /opt/countfile_change
 count=$(diff /opt/countfile*|wc -l)
 if [ $count -gt  ]; then
         echo "web 被篡改！"
 else
         echo "ok"
 fi