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Dos 攻击防范(自动屏蔽攻击 IP)
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#!/bin/bash
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DATE=$(date +%d/%b/%Y:%H:%M)
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LOG_FILE=/usr/local/nginx/logs/demo2.access.log
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ABNORMAL_IP=$(tail -n5000 $LOG_FILE |grep $DATE |awk '{a[$1]++}END{for(i in a)if(a[i]>10)print i}')
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for IP in $ABNORMAL_IP; do
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if [ $(iptables -vnL |grep -c "$IP") -eq 0 ]; then
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iptables -I INPUT -s $IP -j DROP
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echo "$(date +'%F_%T') $IP" >> /tmp/drop_ip.log
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fi
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done
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Linux 系统发送告警脚本
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# yum install mailx
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# vi /etc/mail.rc
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set from=baojingtongzhi@163.com smtp=smtp.163.com
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set smtp-auth-user=baojingtongzhi@163.com smtp-auth-password=123456
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set smtp-auth=login
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MySQL 数据库备份单循环
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#!/bin/bash
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DATE=$(date +%F_%H-%M-%S)
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HOST=localhost
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USER=backup
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PASS=123.com
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BACKUP_DIR=/data/db_backup
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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 $DB_LIST; do
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BACKUP_NAME=$BACKUP_DIR/${DB}_${DATE}.sql
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if ! mysqldump -h$HOST -u$USER -p$PASS -B $DB > $BACKUP_NAME 2>/dev/null; then
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echo "$BACKUP_NAME 备份失败!"
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fi
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done
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MySQL 数据库备份多循环
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#!/bin/bash
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DATE=$(date +%F_%H-%M-%S)
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HOST=localhost
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USER=backup
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PASS=123.com
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BACKUP_DIR=/data/db_backup
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DB_LIST=$(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 $DB_LIST; do
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BACKUP_DB_DIR=$BACKUP_DIR/${DB}_${DATE}
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[ ! -d $BACKUP_DB_DIR ] && mkdir -p $BACKUP_DB_DIR &>/dev/null
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TABLE_LIST=$(mysql -h$HOST -u$USER -p$PASS -s -e "use $DB;show tables;" 2>/dev/null)
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for TABLE in $TABLE_LIST; do
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BACKUP_NAME=$BACKUP_DB_DIR/${TABLE}.sql
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if ! mysqldump -h$HOST -u$USER -p$PASS $DB $TABLE > $BACKUP_NAME 2>/dev/null; then
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echo "$BACKUP_NAME 备份失败!"
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fi
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done
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done
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Nginx 访问访问日志按天切割
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#!/bin/bash
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LOG_DIR=/usr/local/nginx/logs
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YESTERDAY_TIME=$(date -d "yesterday" +%F)
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LOG_MONTH_DIR=$LOG_DIR/$(date +"%Y-%m")
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LOG_FILE_LIST="default.access.log"
-
-
for LOG_FILE in $LOG_FILE_LIST; do
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[ ! -d $LOG_MONTH_DIR ] && mkdir -p $LOG_MONTH_DIR
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mv $LOG_DIR/$LOG_FILE $LOG_MONTH_DIR/${LOG_FILE}_${YESTERDAY_TIME}
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done
-
-
kill -USR1 $(cat /var/run/nginx.pid)
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Nginx 访问日志分析脚本
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#!/bin/bash
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# 日志格式: $remote_addr - $remote_user [$time_local] "$request" $status $body_bytes_sent "$http_referer" "$http_user_agent" "$http_x_forwarded_for"
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LOG_FILE=$1
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echo "统计访问最多的10个IP"
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awk '{a[$1]++}END{print "UV:",length(a);for(v in a)print v,a[v]}' $LOG_FILE |sort -k2 -nr |head -10
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echo "----------------------"
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-
echo "统计时间段访问最多的IP"
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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
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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]}}'
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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
-
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 if
-
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
文章转载:https://mp.weixin.qq.com/s/4XYm_Lphw7cdp937sIHSOg
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