9 个日常实用 Shell 脚本,运维请收藏~

个日常实用

个日常实用

1、Dos 攻击防范(自动屏蔽攻击 IP)

#!/bin/bashDATE=$(date +%d/%b/%Y:%H:%M)LOG_FILE=/usr/local/nginx/logs/demo2.access.logABNORMAL_IP=$(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    fidone

2、Linux 系统发送告警脚本

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

3、MySQL 数据库备份单循环

#!/bin/bashDATE=$(date +%F_%H-%M-%S)HOST=localhostUSER=backupPASS=123.comBACKUP_DIR=/data/db_backupDB_LIST=$(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!" fidone

4、MySQL 数据库备份多循环

#!/bin/bashDATE=$(date +%F_%H-%M-%S)HOST=localhostUSER=backupPASS=123.comBACKUP_DIR=/data/db_backupDB_LIST=$(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 donedone

5、Nginx 访问访问日志按天切割

#!/bin/bashLOG_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 /var/run/nginx.pid)

6、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=$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 -10echo "----------------------"
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 -10echo "----------------------"
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 -nrecho "----------------------"
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]}}'

7、查看网卡实时流量脚本

#!/bin/bashNIC=$1echo -e " In ------ Out"while true; do    OLD_IN=$(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 1done

8、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/localtimeif ! crontab -l |grep ntpdate &>/dev/null ; then    (echo "* 1 * * * ntpdate time.windows.com >/dev/null 2>&1";crontab -l) |crontabfi
# 禁用selinuxsed -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 offfi
# 历史命令显示操作时间if ! grep HISTTIMEFORMAT /etc/bashrc; then echo 'export HISTTIMEFORMAT="%F %T `whoami` "' >> /etc/bashrcfi
# SSH超时时间if ! grep "TMOUT=600" /etc/profile &>/dev/null; then echo "export TMOUT=600" >> /etc/profilefi
# 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 65535EOFfi
# 系统内核优化cat >> /etc/sysctl.conf << EOFnet.ipv4.tcp_syncookies = 1net.ipv4.tcp_max_tw_buckets = 20480net.ipv4.tcp_max_syn_backlog = 20480net.core.netdev_max_backlog = 262144net.ipv4.tcp_fin_timeout = 20EOF
# 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

9、监控 100 台服务器磁盘利用率脚本

#!/bin/bashHOST_INFO=host.infofor 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    donedone

来源:我的小碗汤

4月21-22日,XOps风向标!GOPS 全球运维大会 2022 · 深圳站正式开启,国内外互联网、金融、通信领域TOP议题来袭~,关注 GOPS,运维转型不背锅~

个日常实用

长按下方二维码,进入大会官网 ⬇️

个日常实用

近期好文:

容器技术基石:Linux namespace 和 cgroups,运维了解一下

“高效运维”公众号诚邀广大技术人员投稿,

投稿邮箱:jiachen@greatops.net,或添加联系人微信:greatops1118.
个日常实用
点个“在看”,一年不宕机

文章来源于网络,投诉文章请联系:zhangyunfei@anqiangkj.com

主题测试文章,只做测试使用。发布者:2915,转转请注明出处:https://community.anqiangkj.com/archives/4567

(0)
打赏 微信扫一扫 微信扫一扫 支付宝扫一扫 支付宝扫一扫
上一篇 2022年2月11日 上午7:55
下一篇 2022年2月15日 上午7:57

相关推荐

发表回复

您的电子邮箱地址不会被公开。