linux运维初级班shell脚本编程考试及参考答案20110523

[root@oldboy-B scripts]# cat apachemon
#!/bin/sh
#created by oldboy 20110523
#QQ 31333741
. /etc/init.d/functions
HTTPPRONUM=`ps -ef|grep http|grep -v grep|wc -l`
if [ $HTTPPRONUM -lt 1 ];then
action "httpd is not running" /bin/false
action "httpd is not running" /bin/false >/tmp/httpd.log
httpdctl restart >/dev/null 2>&1
action "httpd is restart" /bin/true
mail -s "`uname -n`''s httpd restarted at `(date)`" 31333741@qq.com </tmp/httpd.log
exit 1
else
action "httpd is running" /bin/true
exit 0
fi

[root@oldboy-B scripts]# apachemon
httpd is running [确定]
[root@oldboy-B scripts]# pkill httpd
[root@oldboy-B scripts]# ps -ef|grep http|grep -v grep
[root@oldboy-B scripts]# apachemon
httpd is not running [失败]
httpd is restart [确定]
[root@oldboy-B scripts]# ps -ef|grep http|grep -v grep
root 5845 1 1 15:59 ? 00:00:00 /usr/sbin/httpd -k restart
apache 5852 5845 0 15:59 ? 00:00:00 /usr/sbin/httpd -k restart
apache 5853 5845 0 15:59 ? 00:00:00 /usr/sbin/httpd -k restart
apache 5854 5845 0 15:59 ? 00:00:00 /usr/sbin/httpd -k restart
apache 5855 5845 0 15:59 ? 00:00:00 /usr/sbin/httpd -k restart
apache 5856 5845 0 15:59 ? 00:00:00 /usr/sbin/httpd -k restart
apache 5857 5845 0 15:59 ? 00:00:00 /usr/sbin/httpd -k restart
apache 5858 5845 0 15:59 ? 00:00:00 /usr/sbin/httpd -k restart
apache 5859 5845 0 15:59 ? 00:00:00 /usr/sbin/httpd -k restart

###脚本改进####
脚本改进测试：
[root@oldboy-B /]# echo oldboytest >/var/www/html/index.htm 拥有帝国一切，皆有可能。欢迎访问phome.net
[root@oldboy-B /]# wget --quiet --spider http://10.0.0.161/index.htm
[root@oldboy-B /]# echo $?
0
[root@oldboy-B /]# ll index.htm
ls: index.htm: 没有那个文件或目录

[root@oldboy-B scripts]# cat apachemon1
#!/bin/sh
#created by oldboy 20110523
#QQ 31333741
. /etc/init.d/functions
#HTTPPRONUM=`ps -ef|grep http|grep -v grep|wc -l` #=====>这个是基于http方式进行判断
wget --quiet --spider http://10.0.0.161/index.htm #=====>这个是基于WGET URL方式进行判断
if [ $? -ne 0 ];then
#action "httpd is not running" /bin/false #=====>正式运行,最好注释掉
action "httpd is not running" /bin/false >/tmp/httpd.log
httpdctl restart >/dev/null 2>&1
action "httpd is restart" /bin/true >>/tmp/httpd.log
mail -s "`uname -n`''s httpd restarted at `(date)`"

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