1、判断当前磁盘剩余空间是否有20G,如果小于20G,则将报警邮件发送给管理员,每天检查一次磁盘剩余空间。
[root@Server-NFS-DNS ~]# yum install mailx -y
[root@Server-NFS-DNS ~]# vim /etc/mail.rc
[root@Server-NFS-DNS ~]# vim disk.sh
[root@Server-NFS-DNS ~]# bash disk.sh
set smtp=smtp.qq.com
set smtp-auth-user=1658635147@qq.com
set smtp-auth-password=jeez.....gei
set smtp-auth=login
编写脚本
#!/bin/bash
disk=$(df -m | grep -w "/" | tr -s " " |cut -d " " -f4)
str1="Warning! disk space less than 20G!"
if [ "$disk" -lt 20000 ]
then
echo "str1" \| mail -s "str1" 1658635147@qq.com
fi
测试能否发送
[root@Server-NFS-DNS ~]# bash disk.sh
编写周期性计划
[root@Server-NFS-DNS ~]# vim /etc/crontab
0 0 * * * root /bin/bash /root/disk1.sh
2、判断web服务是否运行(1、查看进程的方式判断该程序是否运行,2、通过査看端口的方式判断该程序是否运行),如果没有运行,则启动该服务并配置防火墙规则
[root@Server-NFS-DNS ~]# vim web.sh
#!/bin/bash
ps=`ps -ef | grep "httpd" | grep -v "grep" | wc -l`
if [ "$ps" -gt 0 ]
then
echo "htppd is already running"
else
echo "httpd not started,waiting......"
yum install httpd -y &> /dev/null
systemctl start httpd
systemctl start firewalld
firewall-cmd --permanent --zone=public --add-service=http > /dev/null
firewall-cmd --permanent --zone=public --add-port=80/tcp > /dev/null
firewall-cmd --reload > /dev/null
echo "httpd is already running."
fi
[root@Server-NFS-DNS ~]# bash web.sh
测试
3、使用curl命令访问第二题的web服务,看能否正常访问,如果能正常访问,则返回web serveris running;如果不能正常访问,返回12状态码。
[root@node ~]# vim web1.sh
#!/bin/bash
curl -s 192.168.118.131 > /dev/null
if (($?==0))
then
echo "web server is running"
else
echo "web not accessible"
exit 12
fi
测试