nginx日志按天切割

#!/bin/bash
LOG_DIR=/usr/local/nginx/logsYESTERDAY_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 /usr/local/nginx/nginx.pid)

nginx acc日志分析

#!/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=$1echo "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]}}'

服务器初始化

#/bin/bash

# 设置时区并同步时间

ln -s /usr/share/zoneinfo/Asia/Shanghai /etc/localtimeif ! crontab -l | grep ntpdate &>/dev/null ; then (echo "* 1 * * * ntpdate time.windows.com >/dev/null 2>&1";crontab -l) |crontabfi

# 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 firewalldelif 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 65535EOF fi

# 系统内核优化

cat >> /etc/sysctl.conf << EOFnet.ipv4.tcp_syncookies = 1net.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 if

查看网卡实时流量

#!/bin/bash

NIC=$1echo -e " In ------ Out"while true; do OLD_IN=$(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

mysql 备份

#!/bin/bash

DATE=$(date +%F_%H-%M-%S) 
HOST=localhost 
USER=backup 
PASS=passwd 
BACKUP_DIR=/data/db_backup 
DB_LIST=$(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

监控服务器磁盘利用率

#!/bin/bash
HOST_INFO=host.info  

# 主机列表，实现采集多台主机信息，需要能够ssh到目标主机

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

封禁大量恶意访问的IP

#!/bin/bash

DATE=$(date +%d/%b/%Y:%H:%M)
LOG_FILE=/usr/local/nginx/logs/access.log
ABNORMAL_IP=$(tail -n10000 $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

统计进程数，找出并kill 僵尸进程

#!/bin/ bash

ALL_PROCESS=$(1s /proc/ l egrep "[0-9]+") running_count=0 stoped_count=0 s1eeping_count=0 zombie_count=O for pid in ${ALL_PROCESS[*]}dotest -f /proc/$pid/status && state=$(egrep "state"/proc/$pid/status / awk'{print $2}')case ""$state" inR)running_count=$ ((running_count+1));T)stoped_count=$((stoped_count+1));;s)sleeping_count=$((sleeping_count+1));z)zombie_count=$( (zombie_count+1)) echo "$pid" >>zombie.txtkill -9 "$pid";;esacdoneecho -e "total:$((running_count+stoped_count+sleeping_count+zombie_count))\nrunning:$running_count\nstoped: $stoped_count\nsleeping: $sleeping_count\nzombie:$zombie_count"