值得收藏的运维常用16个linux shell脚本

#!/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

# 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

#!/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

#!/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

#!/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)

#!/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]}}'

#!/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

#/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

#!/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

#!bin/bash


# 所以主机，以空格分隔
ALL_HOSTS=(IP 地址 IP 地址)




for host in ${ALL_HOSTS[*]}
do
{
start_time=$(date +'%s')
ssh $host "hostname" &>/dev/null
sleep 2
stop_time=$(date +'%s')
time_consuming=$((stop_time-start_time))
echo "$host: $time_consuming" >>hostname.txt
}&
done
wait




host=$(sort -n -k 2 hostname.txt | head -1 | awk -F':' '{print $1}')
ssh $host "top -b -n 1"

#!/bin/bash


ALL_PROCESS=$(ls proc/ | egrep '[0-9]+')




running_count=0
stoped_count=0
sleeping_count=0
zombie_count=0




for pid in ${ALL_PROCESS[*]}
do
test -f proc/$pid/status && state=$(egrep "State" proc/$pid/status | awk '{print $2}')
case "$state" in
R)
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.txt


kill -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"

#!/bin/bash


ALL_SH_FILE=$(find . -type f -name "*.sh")
for file in ${ALL_SH_FILE[*]}
do
filename=$(echo $file | awk -F'.sh' '{print $1}')
new_filename="${filename}.shell"
mv "$file" "$new_filename"
sed -i '2d' "$new_filename"
done

#!/bin/bash


DIRPATH='/tmp/jstack'
CURRENT_TIME=$(date +'%F'-'%H:%M:%S')




if [ ! -d "$DIRPATH" ];then
mkdir "$DIRPATH"
else
rm -rf "$DIRPATH"/*
fi




cd "$DIRPATH"




while true
do
sleep 3600
# 这里需要将inceptor改后自己的java进程名称
pid=$(ps -ef | grep 'inceptor' | grep -v grep | awk '{print $2}') jstack $pid >> "jstack_${CURRENT_TIME}"
dir_count=$(ls | wc -l)
if [ "$dir_count" -gt 10 ];then
rm -f $(ls -tr | head -1)
fi
done

#!/bin/bash


awk '{print $2}' hive-server2.log | tr -d ':' | awk '{sum+=$1} END {print "avg: ", sum/NR}' >>capture_hive_log.log
awk '{print $2}' hive-server2.log | tr -d ':' | awk '{max = 0} {if ($1+0 > max+0) max=$1} END {print "Max: ", max}'>>capture_hive_log.log

#!/bin/bash


state="true"




while $state
do
SMALL_REQUESTS=$(netstat -ant | awk -F'[ :]+' '/:22/{count[$4]++} END {for(ip in count) print count[ip]}' | sort -n | head -20 | head -1)
if [ "$SMALL_REQUESTS" -gt 500 ];then
sar -A > alert.txt
state="false"
else
sleep 6
continue
fi
done

#!/bin/bash


# 目标目录
DIRPATH='/tmp'
# 查看目录
FILEPATH='.'




find "$FILEPATH" -size +10k -type f | xargs -i mv {} "$DIRPATH"
ls -lS "$DIRPATH" | awk '{if(NR>1) print $NF}'