need shell script which when detect any change/modification in my 5 rewrite rules file,will do a /etc/init.d/httpd

Question

我需要编写一个shell脚本，当在我的5个重写规则文件中检测到任何更改/修改时，将执行/etc/init.d/httpd configtest，如果没有错误，它将重新加载apache。

Answer 1

As suggested in the comments I'd advise you to install inotify:

sudo apt-get install inotify-tools

And after that you can do something as simple as:

while inotifywait -q -e modify filename >/dev/null; do
   echo "filename is changed"
done

You can read the manpage for inotifywait for more info.