Shell scripts automatically delete files from 30 days ago (Latest recommendation)

Shell script automatically deletes files from 30 days ago

The file directory that needs to be deleted is in /data/dbbak.
You can use the following shell script to implement the timely deletion of files 30 days ago in the specified directory:
vi /opt/

#!/bin/bash
target_dir="/data/dbbak"
timestamp=$(date +%s -d "30 days ago")
for file in "${target_dir}"/*
do
    if [[ -f "${file}" && $(date +%s -r "${file}") -lt "${timestamp}" ]]
    then
        rm -f "${file}"
        echo "Deleted file: ${file}"
    fi
done

Set up timed tasks using crontab, for example, perform once every day at 3 a.m.:
0 3 * * * sh /opt/
This will automatically delete files from the specified directory 30 days ago every day.

Supplement: Linux deletes elasticsearch index on a timely basis according to date

Linux deletes elasticsearch index on date time

Use sh script to delete

searchIndex=filebeat
elastic_url=192.168.98.136
elastic_port=9200
saveday=7
date2stamp () {
    date --utc --date "$1" +%s
}
dateDiff (){
    case $1 in
        -s)   sec=1;      shift;;
        -m)   sec=60;     shift;;
        -h)   sec=3600;   shift;;
        -d)   sec=86400;  shift;;
        *)    sec=86400;;
    esac
    dte1=$(date2stamp $1)
    dte2=$(date2stamp $2)
    diffSec=$((dte2-dte1))
    if [ ${diffSec} -lt 0 ]; then abs=-1; else abs=1; fi
    echo $((diffSec/sec*abs))
}
for index in $(curl -s "${elastic_url}:${elastic_port}/_cat/indices?v" | grep  "${searchIndex}" | grep "_log-20[0-9][0-9]\.[0-1][0-9]\.[0-3][0-9]" | awk '{print$3}'); do
        date=$(echo ${index##*-} | sed 's/\./-/g')
        cond=$(date +%Y-%m-%d)
        diff=$(dateDiff -d $date $cond)
        echo -n "${index}****diff**** (${diff})"
        if [ $diff -gt ${saveday} ]; then
          echo "!!!DELETE ${index}"
          curl -XDELETE "${elastic_url}:${elastic_port}/${index}?pretty"
        else
          echo ""
        fi
done

Add timer

crontab -e
# Add the following00 03 * * * /usr/local/elk/elasticsearch-8.17.0/delete_es_by_day.sh &gt; /dev/null 2&gt;&amp;1
#Verify that it has been addedcrontab -l|tail -2

refer to:elasticsearch deletes indexes according to date time
refer to:removing-old-indices-in-elasticsearch

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