Linux脚本点滴

1、当硬盘空间不足15%时，循环删除最早的日志文件(ELK)：

#!/bin/bash
for((i=20;i>=5;i-=1))
do
code=`df /dev/mapper/ElkGroup-lv_elk | grep -c -E \(8[5-9]\%\)\|\(100\%\)`
day=`date -d -"$i days" +%m.%d`
if [ $code -gt 0 ]
then
curl -XDELETE http://127.0.00.1:9200/*.$day
fi
done

2、当硬盘空间小于70%时，自动清理最早的日志文件(Nginx)：

#!/bin/bash
for((i=42;i>=7;i-=1))
do
  code=`df /dev/vdb | grep -c -E \([789][0-9]\%\)\|\(100\%\)`
  day=`date -d -"$i days" +%Y-%m-%d`
  if [ $code -gt 0 ]
  then
  rm -rf /home/nginx/*/access_$day.log
  rm -rf /home/nginx/*/error_$day.log
  fi
done

3、读取Redis表中的值记录到日志中，并将改值置0

#!/bin/bash
for((i=0;i<=1;i+=1))
do
a=(61.189.35.181
59.46.90.82)
echo $(date +%Y%m%d%H%M) $(/usr/local/redis/bin/redis-cli -h 172.16.1.166 -a meTN3xF2yzsbXrRk -n 1 hget ${a[i]} D) >> /usr/local/script/data/${a[i]}.log
/usr/local/redis/bin/redis-cli -h 172.16.1.166 -a meTN3xF2yzsbXrRk -n 1 hset ${a[i]} D 0 > /dev/null 2>&1
done

4、删除同一个项目旧的文件夹，保留最新的那个

#!/bin/bash
for ((i=5;i>=1;i--))
do
NDPATH="/data/dist/"
PRJ="global-v4.dev"
NUM=`ls -lt $NDPATH | grep "$PRJ-*" | wc -l`
# echo $NUM
if [ $NUM -gt 1 ];then
cd $NDPATH
ls -lt $NDPATH | grep "$PRJ-*" | tail -n 1 | xargs rm -rf
fi
done

5、向脚本传递参数：

# ./inputvirible.sh 1 5 9

#!/bin/bash
echo "this shell name is : $0"
echo "the first varible is $1"
echo "the second varible is $2"
echo "the third varible is $3"

6、Base64命令文本转图片：

# sed -i "s/\"//g" /data/base64/*.txt
# sed -i "s/data\:image\/png\;base64\,//g" /data/base64/*.txt

# vim convert.sh
#!/bin/bash

for f in $(find ./ -iname "*.txt");
do

    base64 -d ./$f > /data/base64/$f.png

done

# rename txt.png png ./*

7、按天生成 logstash 系统日志，仅保留最近3天的日志：

# cat /data/logstash/logrotated.sh

#!/bin/bash

day=`date -d -"0 days" +%Y.%m.%d`
PIDS=$(ps -e -f | grep -i "logstash" | grep -v "grep" | grep -v "logrotated" | awk '{print $2}')

if [ "$PIDS" ]; then
kill -9 "$PIDS"
sleep 15
su --login elk --command="/usr/local/logstash-7.6.2/bin/logstash -f /usr/local/logstash-7.6.2/etc/logstash_agent.conf > /data/logstash/log/logstash_"$day".log &"
else
su --login elk --command="/usr/local/logstash-7.6.2/bin/logstash -f /usr/local/logstash-7.6.2/etc/logstash_agent.conf > /data/logstash/log/logstash_"$day".log &"
sleep 30
find "/data/logstash/log/" -name "*.log" -type f -mtime +1 -exec rm {} \;
fi

8、检测 MongoDB 服务状态是否正在运行，并终止服务：

#!/bin/bash

PIDS=$(ps ax | grep -i "mongod-rs" | grep -v grep | awk '{print $1}')

if [ -z "$PIDS" ]; then
  echo "No mongodb server to stop"
  exit 1
else 
  kill -SIGUSR1 $PIDS
fi

　　　

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