写一个脚本，批量生成10个虚拟主机配置：
     /etc/httpd/conf.d/vhosts#.conf
      主机名：www#
      目录：/data/vhosts/www#
      访问日志：logs/www#-access_log
      
     接受命令行参数，作为命令和主机名传递；
      
     使用函数：
      列出：list [-a|vhost_name]
      创建：create vhost_name
      删除：delete [-a|vhost_name]

#!/bin/bash
#function: create param_1 param_2 param_3 ...
create(){
 for i ;
 do
 file="/etc/httpd/conf.d/$i"  #suffix ".conf" is missing.
 if [[ ! -e $file ]];
 then
   
 cat << EOF >>$file
<VirtualHost 172.16.8.100:80>
ServerName www"$i".magedu.com
DocumentRoot /data/vhosts/www"$i"
CustomLog logs/www"$i"-access_log combined
</VirtualHost>
   
EOF
 fi
   
 done
 
}

#del param_1 param_2 param_3 ...
del(){
  for i ;
  do
   file="/etc/httpd/conf.d/$i"
   if [[  -e $file ]];
   then
    /bin/rm -i $file
   fi
  done
}

#list param_1 param_2 param_3 ...
list(){
  for i ;
  do
   file="/etc/httpd/conf.d/$i"
   if [[  -e $file ]];
   then
    echo  $i
   fi
  done
}

vh_name=vhost
TEMP=`getopt -o c:d:l:: --long create:,delete:,list:: -n 'report' -- "$@"`

if [ $? != 0 ] ; then echo "Terminating..." >&2 ; exit 1 ; fi

# Note the quotes around `$TEMP': they are essential!
eval set -- "$TEMP"
echo "$@"
while true ; do
 case "$1" in
  -c|--create)
    create_param=$(echo $2 | awk -F, '{for(i=1;i<=NF;++i){split($i,arr,"-");if(arr[2] ~ /[^[:space:]]/){for(j=arr[1];j<=arr[2];++j) printf "%s ",j}else printf "%s ",arr[1]}}')
    shift 2
    #echo $create_param
    ;;
  -d|--delete)
    case "$2" in
    all)
     delete_param=$(/bin/ls /etc/httpd/conf.d/ | grep -Po "(?<=$vh_name)[^[:space:]]+" | tr '\n' ' ')
     ;;
    *)
     delete_param=$(echo $2 | awk -F, '{for(i=1;i<=NF;++i){split($i,arr,"-");if(arr[2] ~ /[^[:space:]]/){for(j=arr[1];j<=arr[2];++j) printf "%s ",j}else printf "%s ",arr[1]}}')
     ;;
    esac
    shift 2
    #echo $delete_param
    ;;
  -l|--list)
    # l has an optional argument. As we are in quoted mode,
    # an empty parameter will be generated if its optional
    # argument is not found.
    case "$2" in
    "")
     list_param=$(/bin/ls /etc/httpd/conf.d/ | grep -Po "(?<=$vh_name)[^[:space:]]+" | tr '\n' ' ')
     shift 2
     ;;
    *) 
        list_param=$(echo $2 | awk -F, '{for(i=1;i<=NF;++i){split($i,arr,"-");if(arr[2] ~ /[^[:space:]]/){for(j=arr[1];j<=arr[2];++j) printf "%s ",j}else printf "%s ",arr[1]}}')
        shift 2
        echo $list_param
        ;;
    esac
    ;;
  --) shift ; break ;;
  *) echo "Internal error!" ; exit 1 ;;
 esac
done
#echo "Remaining arguments:"
for arg do echo 'extra argument --> '"\`$arg'" ; done
if [[ ! -z $arg ]];then echo "error,exit 1";exit 1;fi

if [[ ! -z $create_param ]];then
 create_files=$(echo $create_param | awk -v vh=$vh_name '{for(i=1;i<=NF;++i)printf "%s%s ",vh,$i}')
 create $create_files
fi
if [[ ! -z $list_param ]];then
 list_files=$(echo $list_param | awk -v vh=$vh_name '{for(i=1;i<=NF;++i)printf "%s%s ",vh,$i}')
 list $list_files
fi
if [[ ! -z $delete_param ]];then
 delete_files=$(echo $delete_param | awk -v vh=$vh_name '{for(i=1;i<=NF;++i)printf "%s%s ",vh,$i}')
 del $delete_files
fi