最近写了2个脚本挺好玩的

ping 几个IP 地址，看是否host still up.

#! /usr/bin/env sh
set -x
set +x
BINARY="$(basename $0)[$$]"
echo "$BINARY"
DIRNAME="$(dirname $0)"
echo "$DIRNAME"
echo $PWD

IP_HEADER="10.32.134."
ip_range=(32 34 35 36 37 38 46 47 48 49)
length=${#ip_range[@]}
for (( i=0;i<$length;i++ ));do
    ping -c 1 $IP_HEADER${ip_range[$i]} 2>&1 > /dev/null
#for i in ${ip_range[@]};do
#    ping -c 1 $IP_HEADER$i 2>&1 > /dev/null
    if [[ $? -ne 0 ]];then
        echo $IP_HEADER$i is not respond to ping
    fi
done
echo "all system are fine"

第二个脚本，使用expect 远程登陆看机器内存，我在网上找了个别人写好的expect 的函数来用，很不错。

#! /usr/bin/env sh

auto_smart_ssh () {
    expect -c "set timeout -1;
                spawn ssh -o StrictHostKeyChecking=no $2 ${@:3};
                expect {
                    *assword:* {send -- $1\r;
                                 expect {
                                    *denied* {exit 2;}
                                    eof
                                 }
                    }
                    eof         {exit 1;}
                }
                "
    return $?
}
read -p "password:" pass
IP_HEADER="10.32.134."
ip_range=(32 34 35 36 37 38 46 47 48 49)
ssh_opts="-o UserKnownHostsFile=/dev/null -o StrictHostKeyChecking=no"

for i in ${ip_range[@]};do
    mem=`auto_smart_ssh $pass $ssh_opts $IP_HEADER$i "free -m" |awk '/Mem:/{print $2}'`
    echo "$IP_HEADER$i has $mem memory"
done

使用sshpass ssh登陆：

sshpass -p'YOURPASSWORD' ssh root@YOURIP