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代码： 全选

#Mins	Hours	Days	Months  Day of the week Command
0,30 22,23,0-6	*       *       *       /opt/bin/auto-down.sh

代码： 全选

#!/bin/bash 

IPRange=192.168.1.
IPStart=100
IPStop=200                                                                    
Ethx=enp2s0
IPFile=/tmp/arping.txt
WHOFile=/tmp/who.txt
LogFile=/var/log/auto-down.log
Win1=61
Win2=62

is_anymachine_live ()
{
    for (( IP=IPStart; IP<=IPStop; IP+=1 ))
    do
        arping -I $Ethx -c 3 $IPRange$IP > $IPFile
        result=$( grep Received $IPFile | awk '{print $2}' )
        if [[ "$result" != 0 ]] ; then
            return 1
        fi
    done
    return 0
}   # ----------  end of function is_anymachine_live ----------

is_anyone_online ()
{
    w>$WHOFile
    result=$(awk 'NR==1{print $6}' $WHOFile)
    if [[ "$result" != 0 ]] ; then
        return 1
    fi
    return 0
}   # ----------  end of function is_anyone_online  ----------

haltwin2k3 ()
{
    # 关闭网中的windows 2003 服务器。
    net rpc shutdown -f -U administrator%passwd -I $IPRange$Win1
    net rpc shutdown -f -U administrator%passwd -I $IPRange$Win2
}   # ----------  end of function haltwin2k3  ----------

# main
if ( is_anymachine_live ) ; then
    if ( is_anyone_online ) ; then
        echo "<<< AT `date` >>> " >> $LogFile
        echo "<<<>>> Now halt windows 2003 servers $IPRange$Win1, $IPRange$Win2" >> $LogFile
        haltwin2k3 
        rm $IPFile
        # 注意：现在要关机！！
        echo "<<<>>> Now halt THIS machine" >> $LogFile
        /sbin/halt 
    else 
        result=$(awk 'NR==1{print $6}' $WHOFile)
        echo "<<<<<< at `date`, still has $result user online." >> $LogFile
        who >> $LogFile
        echo ">>>>>> Don't Panic." >> $LogFile
        rm $WHOFile 
    fi
else 
    echo "<<<<<< at `date`, still has machine run." >> $LogFile
    cat $IPFile >> $LogFile
    echo ">>>>>> Don't Panic." >> $LogFile
    rm $IPFile
fi