用shell脚本实现每隔30年代检查httpd进程存在与否,httpd存在时输出0,不存在输出1。
方法一:
单条命令实现
cat apache.sh
# !/bin/bash
while 真正的
做
ps -ef |, grep http |, grep -v grep 祝辞,/dev/null ,,,, echo 0, | |, echo 1
sleep 30
完成
while 真正的为真,一直执行做循环。
#,ps -ef |, grep http 过滤出http进程
输出结果:
root ,,,,, 7286,,,,, 1,, 0, 15:14 ?,,,,,,,, 00:00:00 /usr/sbin/httpd
nagios ,,, 7288,, 7286,, 0, 15:14 ?,,,,,,,, 00:00:00 /usr/sbin/httpd
nagios ,,, 7289,, 7286,, 0, 15:14 ?,,,,,,,, 00:00:00 /usr/sbin/httpd
nagios ,,, 7290,, 7286,, 0, 15:14 ?,,,,,,,, 00:00:00 /usr/sbin/httpd
nagios ,,, 7291,, 7286,, 0, 15:14 ?,,,,,,,, 00:00:00 /usr/sbin/httpd
nagios ,,, 7292,, 7286,, 0, 15:14 ?,,,,,,,, 00:00:00 /usr/sbin/httpd
nagios ,,, 7293,, 7286,, 0, 15:14 ?,,,,,,,, 00:00:00 /usr/sbin/httpd
nagios ,,, 7294,, 7286,, 0, 15:14 ?,,,,,,,, 00:00:00 /usr/sbin/httpd
nagios ,,, 7295,, 7286,, 0, 15:14 ?,,,,,,,, 00:00:00 /usr/sbin/httpd
root ,,,,, 7440,, 4708,, 0, 15:17 pts/0,,,, 00:00:00 grep http
#,ps -ef |, grep http |, grep -v grep,过滤ps -ef | grep http本身。
输出结果:
root ,,,,, 7286,,,,, 1,, 0, 15:14 ?,,,,,,,, 00:00:00 /usr/sbin/httpd
nagios ,,, 7288,, 7286,, 0, 15:14 ?,,,,,,,, 00:00:00 /usr/sbin/httpd
nagios ,,, 7289,, 7286,, 0, 15:14 ?,,,,,,,, 00:00:00 /usr/sbin/httpd
nagios ,,, 7290,, 7286,, 0, 15:14 ?,,,,,,,, 00:00:00 /usr/sbin/httpd
nagios ,,, 7291,, 7286,, 0, 15:14 ?,,,,,,,, 00:00:00 /usr/sbin/httpd
nagios ,,, 7292,, 7286,, 0, 15:14 ?,,,,,,,, 00:00:00 /usr/sbin/httpd
nagios ,,, 7293,, 7286,, 0, 15:14 ?,,,,,,,, 00:00:00 /usr/sbin/httpd
nagios ,,, 7294,, 7286,, 0, 15:14 ?,,,,,,,, 00:00:00 /usr/sbin/httpd
nagios ,,, 7295,, 7286,, 0, 15:14 ?,,,,,,,, 00:00:00 /usr/sbin/httpd
#,ps -ef |, grep http |, grep -v grep 祝辞,/dev/null,输出到空设备文件。
#,ps -ef |, grep http |, grep -v grep 祝辞,/dev/null ,,,, echo 0, | |, echo 1
逻辑与:,,,逻辑或:| |。”ps -ef |, grep http |, grep -v grep 祝辞,/dev/null”为真时执行echo 0,否则执行echo 1。
方法二:
cat apache.sh
while 真正的
httpnum=' ps -ef |, grep http |, grep -v grep |, wc - l '
做
,,,if [, httpnum 美元;-gt 0,)
,,,then
echo 0
,,,
echo 1
,,fi
sleep 30
完成
方案二摘自老男孩博客http://oldboy.blog.51cto.com/2561410/577227,里面有详细介绍。
