1、监控100台服务器磁盘利用率脚本

#!/bin/bash
HOST_INFO=host.info
for IP in $(awk '/^[^#]/{print $1}' $HOST_INFO); do
    USER=$(awk -v ip=$IP 'ip==$1{print $2}' $HOST_INFO)
    PORT=$(awk -v ip=$IP 'ip==$1{print $3}' $HOST_INFO)
    TMP_FILE=/tmp/disk.tmp
    ssh -p $PORT $USER@$IP 'df -h' > $TMP_FILE
    USE_RATE_LIST=$(awk 'BEGIN{OFS="="}/^\/dev/{print $NF,int($5)}' $TMP_FILE)
    for USE_RATE in $USE_RATE_LIST; do
        PART_NAME=${USE_RATE%=*}
        USE_RATE=${USE_RATE#*=}
        if [ $USE_RATE -ge 80 ]; then
            echo "Warning: $PART_NAME Partition usage $USE_RATE%!"
        fi
    done
done

2、监控MySQL主从同步状态是否异常脚本

#!/bin/bash  
HOST=localhost
USER=root
PASSWD=123.com
IO_SQL_STATUS=$(mysql -h$HOST -u$USER -p$PASSWD -e 'show slave status\G' 2>/dev/null |awk '/Slave_.*_Running:/{print $1$2}')
for i in $IO_SQL_STATUS; do
    THREAD_STATUS_NAME=${i%:*}
    THREAD_STATUS=${i#*:}
    if [ "$THREAD_STATUS" != "Yes" ]; then
        echo "Error: MySQL Master-Slave $THREAD_STATUS_NAME status is $THREAD_STATUS!" |mail -s "Master-Slave Staus" xxx@163.com
    fi
done

3、MySQL数据库备份单循环

#!/bin/bash
DATE=$(date +%F_%H-%M-%S)
HOST=localhost
USER=backup
PASS=123.com
BACKUP_DIR=/data/db_backup
DB_LIST=$(mysql -h$HOST -u$USER -p$PASS -s -e "show databases;" 2>/dev/null |egrep -v "Database|information_schema|mysql|performance_schema|sys")
`for DB in $DB_LIST; do
BACKUP_NAME=$BACKUP_DIR/${DB}_${DATE}.sql
if ! mysqldump -h$HOST -u$USER -p$PASS -B $DB > $BACKUP_NAME 2>/dev/null; then
echo "$BACKUP_NAME 备份失败!"
fi
done`

4、MySQL数据库备份多循环

#!/bin/bash
DATE=$(date +%F_%H-%M-%S)
HOST=localhost
USER=backup
PASS=123.com
BACKUP_DIR=/data/db_backup
DB_LIST=$(mysql -h$HOST -u$USER -p$PASS -s -e "show databases;" 2>/dev/null |egrep -v "Database|information_schema|mysql|performance_schema|sys")
`for DB in $DB_LIST; do
BACKUP_DB_DIR=$BACKUP_DIR/${DB}_${DATE}
[ ! -d $BACKUP_DB_DIR ] && mkdir -p $BACKUP_DB_DIR &>/dev/null
TABLE_LIST=$(mysql -h$HOST -u$USER -p$PASS -s -e "use $DB;show tables;" 2>/dev/null)
for TABLE in $TABLE_LIST; do
BACKUP_NAME=$BACKUP_DB_DIR/${TABLE}.sql
if ! mysqldump -h$HOST -u$USER -p$PASS $DB $TABLE > $BACKUP_NAME 2>/dev/null; then
echo "$BACKUP_NAME 备份失败!"
fi
done
done`

5、Dos攻击防范（自动屏蔽攻击IP）

#!/bin/bash
DATE=$(date +%d/%b/%Y:%H:%M)
LOG_FILE=/usr/local/nginx/logs/demo2.access.log
ABNORMAL_IP=$(tail -n5000 $LOG_FILE |grep $DATE |awk '{a[$1]++}END{for(i in a)if(a[i]>10)print i}')
for IP in $ABNORMAL_IP; do
    if [ $(iptables -vnL |grep -c "$IP") -eq 0 ]; then
        iptables -I INPUT -s $IP -j DROP
        echo "$(date +'%F_%T') $IP" >> /tmp/drop_ip.log
    fi
done

6、Linux系统发送告警脚本

# yum install mailx
# vi /etc/mail.rc  
set from=baojingtongzhi@163.com smtp=smtp.163.com
set smtp-auth-user=baojingtongzhi@163.com smtp-auth-password=123456
set smtp-auth=login

7、nginx 访问访问日志按天切割

#!/bin/bash
LOG_DIR=/usr/local/nginx/logs
YESTERDAY_TIME=$(date -d "yesterday" +%F)
LOG_MONTH_DIR=$LOG_DIR/$(date +"%Y-%m")
LOG_FILE_LIST="default.access.log"

for LOG_FILE in $LOG_FILE_LIST; do
\[ ! -d $LOG_MONTH_DIR \] \&\& mkdir -p $LOG_MONTH_DIR
mv $LOG_DIR/$LOG_FILE $LOG_MONTH_DIR/${LOG_FILE}_${YESTERDAY_TIME}
done

`kill -USR1 $(cat /var/run/nginx.pid)`

8、nginx访问日志分析脚本

#!/bin/bash
LOG_DIR=/usr/local/nginx/logs
YESTERDAY_TIME=$(date -d "yesterday" +%F)
LOG_MONTH_DIR=$LOG_DIR/$(date +"%Y-%m")
LOG_FILE_LIST="default.access.log"

for LOG_FILE in $LOG_FILE_LIST; do
\[ ! -d $LOG_MONTH_DIR \] \&\& mkdir -p $LOG_MONTH_DIR
mv $LOG_DIR/$LOG_FILE $LOG_MONTH_DIR/${LOG_FILE}_${YESTERDAY_TIME}
done

`kill -USR1 $(cat /var/run/nginx.pid)`

8、nginx访问日志分析脚本

#!/bin/bash
# 日志格式: $remote_addr - $remote_user [$time_local] "$request" $status $body_bytes_sent "$http_referer" "$http_user_agent" "$http_x_forwarded_for"
LOG_FILE=$1
echo "统计访问最多的10个IP"
awk '{a[$1]++}END{print "UV:",length(a);for(v in a)print v,a[v]}' $LOG_FILE |sort -k2 -nr |head -10
echo "----------------------"

echo "统计时间段访问最多的IP"
awk '$4\>="\[01/Dec/2018:13:20:25" \&\& $4\<="\[27/Nov/2018:16:20:49"{a\[$1\]++}END{for(v in a)print v,a\[v\]}' $LOG_FILE \|sort -k2 -nr\|head -10
echo "----------------------"


echo "统计访问最多的10个页面"
awk '{a\[$7\]++}END{print "PV:",length(a);for(v in a){if(a\[v\]\>10)print v,a\[v\]}}' $LOG_FILE \|sort -k2 -nr
echo "----------------------"

`echo "统计访问页面状态码数量"
awk '{a[$7" "$9]++}END{for(v in a){if(a[v]>5)print v,a[v]}}' $LOG_FILE |sort -k3 -nr`

9、查看网卡实时流量脚本

#!/bin/bash
NIC=$1
echo -e " In ------ Out"
while true; do
    OLD_IN=$(awk '$0~"'$NIC'"{print $2}' /proc/net/dev)
    OLD_OUT=$(awk '$0~"'$NIC'"{print $10}' /proc/net/dev)
    sleep 1
    NEW_IN=$(awk  '$0~"'$NIC'"{print $2}' /proc/net/dev)
    NEW_OUT=$(awk '$0~"'$NIC'"{print $10}' /proc/net/dev)
    IN=$(printf "%.1f%s" "$((($NEW_IN-$OLD_IN)/1024))" "KB/s")
    OUT=$(printf "%.1f%s" "$((($NEW_OUT-$OLD_OUT)/1024))" "KB/s")
    echo "$IN $OUT"
    sleep 1
done

10、服务器系统配置初始化脚本

#/bin/bash
# 设置时区并同步时间
ln -s /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
if ! crontab -l |grep ntpdate &>/dev/null ; then
    (echo "* 1 * * * ntpdate time.windows.com >/dev/null 2>&1";crontab -l) |crontab 
fi

禁用selinux
=========



sed -i '/SELINUX/{s/permissive/disabled/}' /etc/selinux/config


关闭防火墙
=====



if egrep "7.\[0-9\]" /etc/redhat-release \&\>/dev/null; then
systemctl stop firewalld
systemctl disable firewalld
elif egrep "6.\[0-9\]" /etc/redhat-release \&\>/dev/null; then
service iptables stop
chkconfig iptables off
fi


历史命令显示操作时间
==========



if ! grep HISTTIMEFORMAT /etc/bashrc; then
echo 'export HISTTIMEFORMAT="%F %T `whoami` "' \>\> /etc/bashrc
fi


SSH超时时间
=======



if ! grep "TMOUT=600" /etc/profile \&\>/dev/null; then
echo "export TMOUT=600" \>\> /etc/profile
fi


禁止root远程登录
==========



sed -i 's/#PermitRootLogin yes/PermitRootLogin no/' /etc/ssh/sshd_config


禁止定时任务向发送邮件
===========



sed -i 's/\^MAILTO=root/MAILTO=""/' /etc/crontab


设置最大打开文件数
=========



if ! grep "\* soft nofile 65535" /etc/security/limits.conf \&\>/dev/null; then
cat \>\> /etc/security/limits.conf \<\< EOF
\* soft nofile 65535
\* hard nofile 65535
EOF
fi


系统内核优化
======



cat \>\> /etc/sysctl.conf \<\< EOF
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_max_tw_buckets = 20480
net.ipv4.tcp_max_syn_backlog = 20480
net.core.netdev_max_backlog = 262144
net.ipv4.tcp_fin_timeout = 20

EOF


减少SWAP使用
========



echo "0" \> /proc/sys/vm/swappiness


安装系统性能分析工具及其他
=============


`yum install gcc make autoconf vim sysstat net-tools iostat iftop iotp lrzsz -y`

11、目录文件变化监控和实时文件同步

#!/bin/bash
`MON_DIR=/opt
inotifywait -mqr --format %f -e create $MON_DIR |`
`
while read files; do
rsync -avz /opt /tmp/opt
#echo "$(date +'%F %T') create $files" | mail -s "dir monitor" xxx@163.com
done`

12、批量创建100用户并设置密码脚本

#!/bin/bash
DATE=$@
USER_FILE=user.txt
for USER in $USER_LIST; do
    if ! id $USER &>/dev/null; then
        PASS=$(echo $RANDOM |md5sum |cut -c 1-8)
        useradd $USER
        echo $PASS |passwd --stdin $USER &>/dev/null
        echo "$USER   $PASS" >> $USER_FILE
        echo "$USER User create successful."
    else
        echo "$USER User already exists!"
    fi
done

13、批量检测网站是否异常脚本

#!/bin/bash  
URL_LIST="www.baidu.com www.ctnrs.com"
for URL in $URL_LIST; do
    FAIL_COUNT=0
    for ((i=1;i<=3;i++)); do
        HTTP_CODE=$(curl -o /dev/null --connect-timeout 3 -s -w "%{http_code}" $URL)
        if [ $HTTP_CODE -eq 200 ]; then
            echo "$URL OK"
            break
        else
            echo "$URL retry $FAIL_COUNT"
            let FAIL_COUNT++
        fi
    done
    if [ $FAIL_COUNT -eq 3 ]; then
        echo "Warning: $URL Access failure!"
    fi
done

14、批量主机远程执行命令脚本

#!/bin/bash
COMMAND=$*
HOST_INFO=host.info
for IP in $(awk '/^[^#]/{print $1}' $HOST_INFO); do
    USER=$(awk -v ip=$IP 'ip==$1{print $2}' $HOST_INFO)
    PORT=$(awk -v ip=$IP 'ip==$1{print $3}' $HOST_INFO)
    PASS=$(awk -v ip=$IP 'ip==$1{print $4}' $HOST_INFO)
    expect -c "
       spawn ssh -p $PORT $USER@$IP
       expect {
          \"(yes/no)\" {send \"yes\r\"; exp_continue}
          \"password:\" {send \"$PASS\r\"; exp_continue}
          \"$USER@*\" {send \"$COMMAND\r exit\r\"; exp_continue}
       }
    "
    echo "-------------------"
done

15、一键部署LNMP网站平台脚本

#!/bin/bash
NGINX_V=1.15.6
PHP_V=5.6.36
TMP_DIR=/tmp

INSTALL_DIR=/usr/local


PWD_C=$PWD


echo
echo -e "\\tMenu\\n"
echo -e "1. Install Nginx"
echo -e "2. Install PHP"
echo -e "3. Install MySQL"
echo -e "4. Deploy LNMP"
echo -e "9. Quit"


function command_status_check() {
if \[ $? -ne 0 \]; then
echo $1
exit
fi
}


function install_nginx() {
cd $TMP_DIR
yum install -y gcc gcc-c++ make openssl-devel pcre-devel wget
wget http://nginx.org/download/nginx-${NGINX_V}.tar.gz
tar zxf nginx-${NGINX_V}.tar.gz
cd nginx-${NGINX_V}
./configure --prefix=$INSTALL_DIR/nginx 

--with-http_ssl_module 

--with-http_stub_status_module 

--with-stream
command_status_check "Nginx - 平台环境检查失败！"
make -j 4
command_status_check "Nginx - 编译失败！"
make install
command_status_check "Nginx - 安装失败！"
mkdir -p $INSTALL_DIR/nginx/conf/vhost
alias cp=cp ; cp -rf $PWD_C/nginx.conf $INSTALL_DIR/nginx/conf
rm -rf $INSTALL_DIR/nginx/html/\*
echo "ok" \> $INSTALL_DIR/nginx/html/status.html
echo '\<?php echo "ok"?\>' \> $INSTALL_DIR/nginx/html/status.php
$INSTALL_DIR/nginx/sbin/nginx
command_status_check "Nginx - 启动失败！"
}


function install_php() {
cd $TMP_DIR
yum install -y gcc gcc-c++ make gd-devel libxml2-devel 

libcurl-devel libjpeg-devel libpng-devel openssl-devel 

libmcrypt-devel libxslt-devel libtidy-devel
wget http://docs.php.net/distributions/php-${PHP_V}.tar.gz
tar zxf php-${PHP_V}.tar.gz
cd php-${PHP_V}
./configure --prefix=$INSTALL_DIR/php 

--with-config-file-path=$INSTALL_DIR/php/etc 

--enable-fpm --enable-opcache 

--with-mysql --with-mysqli --with-pdo-mysql 

--with-openssl --with-zlib --with-curl --with-gd 

--with-jpeg-dir --with-png-dir --with-freetype-dir 

--enable-mbstring --enable-hash
command_status_check "PHP - 平台环境检查失败！"
make -j 4
command_status_check "PHP - 编译失败！"
make install
command_status_check "PHP - 安装失败！"
cp php.ini-production $INSTALL_DIR/php/etc/php.ini
cp sapi/fpm/php-fpm.conf $INSTALL_DIR/php/etc/php-fpm.conf
cp sapi/fpm/init.d.php-fpm /etc/init.d/php-fpm
chmod +x /etc/init.d/php-fpm
/etc/init.d/php-fpm start
command_status_check "PHP - 启动失败！"
}

`read -p "请输入编号：" number
case $number in
1)
install_nginx;;
2)
install_php;;
3)
install_mysql;;
4)
install_nginx
install_php
;;
9)
exit;;
esac
`

16、一键查看服务器资源利用率

#!/bin/bash
function cpu() {
    NUM=1
    while [ $NUM -le 3 ]; do
        util=`vmstat |awk '{if(NR==3)print 100-$15"%"}'`
        user=`vmstat |awk '{if(NR==3)print $13"%"}'`
        sys=`vmstat |awk '{if(NR==3)print $14"%"}'`
        iowait=`vmstat |awk '{if(NR==3)print $16"%"}'`
        echo "CPU - 使用率: $util , 等待磁盘IO响应使用率: $iowait"
        let NUM++
        sleep 1
    done
}

function memory() {
total=`free -m |awk '{if(NR==2)printf "%.1f",$2/1024}'`
used=`free -m |awk '{if(NR==2) printf "%.1f",($2-$NF)/1024}'`
available=`free -m |awk '{if(NR==2) printf "%.1f",$NF/1024}'`
echo "内存 - 总大小: ${total}G , 使用: ${used}G , 剩余: ${available}G"
}


function disk() {
fs=$(df -h \|awk '/\^/dev/{print $1}')
for p in $fs; do
mounted=$(df -h \|awk '$1=="'$p'"{print $NF}')
size=$(df -h \|awk '$1=="'$p'"{print $2}')
used=$(df -h \|awk '$1=="'$p'"{print $3}')
used_percent=$(df -h \|awk '$1=="'$p'"{print $5}')
echo "硬盘 - 挂载点: $mounted , 总大小: $size , 使用: $used , 使用率: $used_percent"
done
}


function tcp_status() {
summary=$(ss -antp \|awk '{status\[$1\]++}END{for(i in status) printf i":"status\[i\]" "}')
echo "TCP连接状态 - $summary"
}

`cpu
memory
disk
tcp_status
`

17、找出占用CPU 内存过高的进程脚本

ps -eo user,pid,pcpu,pmem,args --sort=-pcpu  |head -n 10
`ps -eo user,pid,pcpu,pmem,args --sort=-pmem  |head -n 10`