基于ntp的多服务器时间同步脚本

#!/bin/bash
time=5
ip(){
echo "192.168.48.114"
echo "192.168.28.233"
}
stp(){
/etc/init.d/ntpd stop
}
upd(){
ntpdate us.pool.ntp.org
}
stt(){
/etc/init.d/ntpd start
}

num=`ps -ef | grep ntpd.pid | grep -v grep`
not(){
if [ ! -n "$num" ]; then
#       echo "IS NULL"
        upd
        stt
else
#       echo "NOT NULL"
        stp
        upd
        stt
fi
}

ntp(){
while true
do
sleep $time
for i in `ip`
do
        ssh $i ntpdate 192.168.48.117
        if [[ 00 == `date | awk -F ":" ‘{print $2}‘` ]]
        then
                not
                sleep 240 
                break
        fi
done
done
}
ntp&