今天执行脚本的时候遇到错误，如下图：
root@ApFree:/usr/sbin# ./conntrack_num_graph.sh ./conntrack_num_graph.sh: line 9: syntax error: unexpected "then" (expecting "}") root@ApFree:/usr/sbin#
我就纳闷了，这个脚本几天前是能正常执行的，今天执行怎么会出错，why?
cat脚本一看如下：
#!/bin/sh SITENAME="apfree"聽聽聽聽聽 # change for your site mkdir -p /mnt/rrd #iptables -L traffic -vnxZ -t filter > /tmp/traffic.tmp # $1 = ImageFile, $2 = Time in secs to go back, $3 = RRDfile, $4 = GraphText CreateGraph () { 聽聽聽聽聽聽聽聽# only run, if no other rrdtool is running 聽聽聽聽聽聽聽聽if [ -n "$(ps | grep rrdtool | grep -v grep)" ];then return 聽聽聽聽聽聽聽聽fi 聽 聽聽聽聽聽聽聽聽rrdtool graph "${1}" -a PNG -s -"${2}" -w 550 -h 240 -v "" 聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽'DEF:count='${3}':conntrack_count:AVERAGE' 聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽'AREA:count#32CD32:Conntrack number' 聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽'HRULE:0#000000' -t "${4}" } 聽 # build sum-graph if [ ! -e /mnt/rrd/conntrack_num.rrd ] ; then 聽聽聽聽聽聽聽聽rrdtool create /mnt/rrd/conntrack_num.rrd -s 300 聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽DS:conntrack_count:GAUGE:600:0:600000000 聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽聽RRA:AVERAGE:0.5:1:600 fi CONNTRACK_COUNT=`cat /proc/sys/net/netfilter/nf_conntrack_count` rrdtool update /mnt/rrd/conntrack_num.rrd N:$CONNTRACK_COUNT CreateGraph /mnt/rrd/conntrack_num.png 86400 /mnt/rrd/conntrack_num.rrd "conntrack from $SITENAME"
尼玛，这下才明白，有乱码！怪不得会出错呢！
为什么会有乱码呢？哦，原来是因为我之前把这个脚本删除了，然后从麦库记事本上把代码直接copy过来重新建立的脚本，才会出现这种情况！
解决办法：把乱码全部删除掉，再执行，就ok了，只不过这样真心很麻烦呀，如果看官们有更方便的办法，还请告诉我呀。