linux关闭防火墙小脚本

#！bin/bash

sleep 5

#关闭linux防火墙

a=$(iptables -L | grep anywhere | wc -l)

if [ $a -eq 0 ] ; then
        
		echo "防火墙已关闭"
        exit
        
else
	#判断是c6还是c7
	if egrep "7.[0-9].[0-9]" /etc/redhat-release &> /dev/null;then
        echo $?
		systemctl stop firewalld.service &&  systemctl enable firewalld.service
        
		if [ $? -eq 0 ] ;then
        
		echo "防火墙已由开启状态变为关闭状态"
		exit
		
        else
        
		echo "防火墙未关闭异常!!"
		exit
		
		fi
        
	
	elif egrep "6.[0-9].[0-9]" /etc/redhat-release &> /dev/null;then
		echo $?
        service iptables stop && checkconfig iptables off
        
		if [ $? -eq 0 ] ;then
        
		echo "防火墙已由开启状态变为关闭状态"
		exit
		        
        else
        
		echo "防火墙未关闭异常!!"
		exit
        
		fi
	fi
fi

常见报错：basic.sh: 第 7 行:[: enforcing: 期待整数表达式

"-eq" 对整数进行比较 如数字
"=="  对字符串进行比较 如“dhdj454”