# nano /usr/lib/zabbix//externalscripts/time_folder.sh


#!/bin/bash

BK_DIR="/opt/Backup"
TARGET="$1"
current_time=$(date +"%s")

for srv in $(ls "$BK_DIR")
do
    archive_path="$BK_DIR/$srv"

    # получаем время изменения файла/архива
    backup_unix=$(stat -c %Y "$archive_path" 2>/dev/null)

    # если файл не найден — пропускаем
    [ -z "$backup_unix" ] && continue

    # разница в минутах
    diff_minutes=$(( (current_time - backup_unix) / 60 ))

    # вывод
    if [ -n "$TARGET" ]; then
        [ "$srv" = "$TARGET" ] && echo "$diff_minutes"
    else
        echo "$srv $diff_minutes"
    fi
done

# nano /etc/zabbix/zabbix_agentd.d/backup_info.conf
# UserParameter=backup.time[*],/usr/lib/zabbix//externalscripts/time_folder.sh $1
# chmod +x /usr/lib/zabbix//externalscripts/time_folder.sh
# chown zabbix:zabbix /usr/lib/zabbix//externalscripts/time_folder.sh