Nagios是一款開源的免費網絡監視工具，能有效監控Windows、Linux和Unix的主機狀態，交換機路由器等網絡設置，打印機等。在系統或服務狀態異常時發出郵件或短信報警第一時間通知網站運維人員，在狀態恢復后發出正常的郵件或短信通知。

#!/bin/bash #!/usr/bin/expect -f #!/usr/bin/env bash for((i=101;i<=177;i++)) do #cmd="wget http://172.16.92.99/scripts/nagios_client_install.sh && chmod 777 nagios_client_install.sh && sh nagios_client_install.sh" line="192.168.89.$i"cmd1="/etc/init.d/xinetd restart"cmd2="ssh root@$line"cmd3="scp -r ./nagios/libexec  $line:/usr/local/nagios"cmd4="scp ./nagios/nrpe.cfg  $line:/usr/local/nagios/etc/"expect -c "#set timeout 20; #spawn $cmd4; set timeout 200; spawn $cmd3; set timeout 20; #spawn $cmd2; set timeout 1200; #expect "*@*";send /"$cmd1/r exit/r/";; expect eof;" if [ $i -eq 145 ]     then    i=151 fi done