蓝鲸脚本集合

统计cpu使用率

#CPU
#!/bin/bash
TotalA=`cat /proc/stat | sed -n '1p' | awk '{print $2+$3+$4+$5+$6+$7+$8}'`
IDLEA=`cat /proc/stat |sed -n '1p' |awk '{print $5}'`
sleep 2
TotalB=`cat /proc/stat | sed -n '1p' | awk '{print $2+$3+$4+$5+$6+$7+$8}'`
IDLEB=`cat /proc/stat |sed -n '1p' |awk '{print $5}'`
Total=`echo "$TotalB-$TotalA" |bc`
Idle=`echo "$IDLEB-$IDLEA" |bc`
USAGE=`echo "$Idle/$Total*100"|bc -l`
RATE=`echo "100-$USAGE "|bc -l`
USERATE=`echo "scale=2;$RATE/1"|bc`%

统计内存使用率

#!/bin/bash
onemin=$(cat /proc/loadavg |awk '{print $1}')
fivemin=`cat /proc/loadavg |awk '{print $2}'`
shiwumin=`cat /proc/loadavg |awk '{print $3}'`                    
echo "load1" ${onemin}
echo "load5" ${fivemin}
echo "load15" ${shiwumin}

服务器初始化

要求：打开TCP连接快速回收功能，提示：net.ipv4.tcp_tw_reuse = 1

设置系统最大文件打开数为 204800,立即生效

将 ssh 访问的 TCP 为 ESTABLISHED 状态的连接全kill掉 

#!/bin/bash
#打开TCP连接
sed -i '$a net.ipv4.tcp_tw_reuse = 1' /etc/sysctl.conf
cat /etc/sysctl.conf | grep "net.ipv4.tcp_tw_reuse"
#系统最大文件打开数
ulimit -n 204800
ulimit -a | grep "open files"
#ssh进程kill
sshd_pid=`netstat -lantp | grep -w sshd | grep ESTABLISHED | awk '{print $(NF-1)}' | awk -F "/" '{print $1}' | xargs`
for i in $sshd_pid
do
    kill -9 $i
done

#!/bin/bash
ulimit -n 204800
ulimit -a | grep "open files"
date_time=`date +"%Y-%m-%d"`
echo "/corefile/core-$date_time" > /proc/sys/kernel/core_pattern
cat /proc/sys/kernel/core_pattern

发布logicsvr作业

要求：

分发logicsvr.tar.gz

解压程序包到/opt目录

修改配置文件logicsvr.conf，address="本机内网ip"

启动命令：logicsvr -c logicsvr.conf 

#!/bin/bash
IP_HOST=`hostname -i`
tar xf /opt/logicsvr.tar.gz -C /opt
sed -i "s/address=.*/address=$IP_HOST/g" /opt/logicsvr/logicsvr.conf
echo "test"
cd /opt/logicsvr && ./logicsvr -c logicsvr.conf
ps -ef | grep logicsvr

logicsvr进程监控

要求：创建logicsvr进程监控,如果进程不存在自动拉起进程,并且写日志到/opt/logicsvr_monitor.log

将进程监控作业设置为定时执行,每分钟执行一次 

#!/bin/bash
date_time=`date +"%Y-%m-%d"`
ps -ef |grep -w  logicsvr | grep -v grep
if [ $? == 0 ];
then
        echo "logicsvr success"
else
        cd /opt/logicsvr && ./logicsvr -c logicsvr.conf
    ps -ef | grep logicsvr
        echo "logicsvr restart ok $date_time" >> /opt/logicsvr_monitor.log
fi

部署nginx

要求：部署NGINX

配置NGINX监听内网IP,并启动NGINX 

#!/bin/bash
rpm -qa |grep nginx
if [ $? == 0 ];
then
    sed -i  '/.*[:/d' /etc/nginx/nginx.conf && sed  -i 's/listen.*/listen 127.0.0.1:80;/g' /etc/nginx/nginx.conf
    systemctl start nginx
else
    yum install nginx -y
fi

部署apache

#!/bin/bash
rpm -qa | grep httpd
if [ $? != 0 ];then
    yum -y insatll httpd
    sed  -i 's/80/8089/g' /etc/httpd/conf/httpd.conf
else
    service httpd start && service httpd status
fi