shell脚本
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12.监控iptables
cat 12_iptables.sh
#!/bin/bash
#Usage:Monitor the iptables
#Author:chengyanli
#Date:2016/7/15
watch -n 1 ‘/etc/init.d/iptables status‘
14.查看路由
cat 14_route.sh
#!/bin/bash
#Usage:Judge 10.0.0.0 is one of the route or not
#Author:chengyanli
#Date:/2016/7/20
route -n | grep 10.0.0.0 > /dev/null
if [ $? != 0 ]; then
echo ‘The 10.0.0.0 is not one of the route‘
else
echo ‘The 10.0.0.0 is one of the route‘
fi
17系统负载
cat 17_load.sh
#!/bin/bash
#Usage:Judge the server load is bigger than 4 or not
#Author:chengyanli
#Date:2016/7/15
IP=`ip addr show|sed ‘8!d‘|awk ‘{print $2}‘|cut -f 1 -d ‘/‘`
#The load of server in 1min,5min,15min
a=`uptime | awk -F ‘:‘ ‘{print $5}‘ |awk -F ‘,‘ ‘{print $1}‘ |awk -F ‘.‘ ‘{print $1}‘`
b=`uptime | awk -F ‘:‘ ‘{print $5}‘ |awk -F ‘,‘ ‘{print $2}‘ |awk -F ‘.‘ ‘{print $1}‘`
c=`uptime | awk -F ‘:‘ ‘{print $5}‘ |awk -F ‘,‘ ‘{print $3}‘ |awk -F ‘.‘ ‘{print $1}‘`
d=4
#Judge server load in 1min is bigger than 4 or not
if [ "$a" -ge "$d" ] ; then
echo -e " ${IP} sever load is bigger than 4 \n\n `date +%Y-%m-%d`" |mail -s ‘WARNING‘ $USER
fi
#Judge server load in 5min is bigger than 4 or not
if [ "$b" -ge "$d" ] ; then
echo -e " ${IP} sever load is bigger than 4 \n\n `date +%Y-%m-%d`" |mail -s ‘WARNING‘ $USER
fi
#Judge server load in 15min is bigger than 4 or not
if [ "$c" -ge "$d" ] ; then
echo -e " ${IP} sever load is bigger than 4 \n\n `date +%Y-%m-%d`" |mail -s ‘WARNING‘ $USER
fi
18.批量查看home分区使用
cat 18_home.sh
#!/bin/bash
#Usage:count the use of /home
#Author:chengyanli
#Date:2016/07/25
#This is a function to achieve auto_ssh_login
auto_ssh_copy_id(){
expect -c "set timeout -1;
spawn /usr/bin/ssh-copy-id -i /root/.ssh/id_rsa.pub [email protected]$1;
expect {
*(yes/no)* {send -- yes\r;exp_continue;}
*password:* {send -- $2\r;exp_continue;}
eof {exit 0;}
}";
}
#login remote host and count the use of home
while read line
do
ip=`echo $line | awk ‘{print $1}‘`
pass=`echo $line | awk ‘{print $2}‘`
auto_ssh_copy_id ${ip} ${pass} >/dev/null 2>&1
sleep 1
home_used=`ssh -n $ip ‘df -h|grep home‘`
echo ${ip} home used: $home_used
echo
done < /mnt/ip_list
19查看syslog是否正常工作
cat 19_syslog.sh
#!/bin/bash
#Usage:monitor the syslog with error
#Author:chengyanli
#Date:2016/7/15
IP=`ip addr show|sed ‘8!d‘|awk ‘{print $2}‘|cut -f 1 -d ‘/‘`
#if error messages,give an alarm
cat /var/log/messages |grep error >/dev/null 2>&1
if [ $? = 0 ];then
echo -e "Notice:${IP} error messages \n\n `date +%Y-%m-%d`"
else
echo ‘no error messages‘
fi
20.非法ip入侵
cat 20_ip.sh
#!/bin/bash
#Usage:ip unusual
#Author:chengyanli
#Date:2016/7/20
#The history ip
myarray=`last|grep pts|awk ‘{print $3}‘|sort|uniq`
#A module to check unusual ip
for i in ${myarray}
do
cat /etc/hosts.allow|grep ${i}
if [ ! $? -eq 0 ]
then
echo "Notice:unusual ip:${i} in"
fi
done
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