監控apache腳本：
1、每十分鐘檢查apache是否正常運行
分析：進程在運行如何判斷
1）lockfile是否存在
2）pid是在后臺存在
3）能否正常訪問頁面

2、如果apache運行不正常（進程死亡、頁面訪問也不正常等情況），
需要腳本能夠通過重啟apache進程來恢復正常。
分析：
1）先恢復后報警
2）如何恢復
3）如何報警

3、當apache故障時能通過郵件及短信報警，當apache故障恢復后能夠通知管理員
1）重新檢查apache是否正常
2）如果正常發信息告訴管理員已經自動恢復成功
3）如果apache還是不正常，發信息告知管理上線手工修復

#!/bin/bashif [ -f /var/lock/subsys/httpd ]
thenexport pid=`cat /var/run/httpd/httpd.pid`ps -p $pid | grep httpd &> /dev/nullREL1=$?elinks -dump http://localhost/ok.html &> /dev/nullREL2=$?if [ 0 -eq $REL1 ] && [ 0 -eq $REL2  ]then: elsepkill -9 httpdservice httpd restart &> /dev/nullREL3=$?echo "httpd is not OK" | mail -s "httpd is not ok" root@localhostsleep 3sif [ $REL3 -eq 0 ]thenecho "httpd is recovered OK" |  mail -s "httpd is recovered ok" root@localhostelseecho "httpd is recovered not OK,please login your server and recover by yourself" | mail -s "httpd is recovered not ok" root@localhostfifi
elseservice httpd start &> /dev/nullREL4=$?echo "httpd is not OK" | mail -s "httpd is not ok" root@localhostsleep 3sif [ $REL4 -eq 0 ]thenecho "httpd is recovered OK" |  mail -s "httpd is recovered ok" root@localhostelseecho "httpd is recovered not OK,please login your server and recover by yourself" | mail -s "httpd is recovered not ok" root@localhostfifi

*/10 * * * * sh httpd.sh