sonar/delete_history_image.sh

#!/bin/bash
# @File  : delete_history_image.sh
# @Author: DJW
# @Date  : 2023-11-06 14:00
# @Desc  : 该脚本实现目标图像目录超过 max_images 张图像就删除旧图像的功能

image_path="/data/sonar_img"
max_images=20000

# 获取当前图片数量
image_count=$(find "$image_path" -maxdepth 1 -type f -name "*.jpg" | wc -l)

# 如果图片数量超过最大数量，就开始删除
if [ "$image_count" -gt "$max_images" ]; then
    # 计算要删除的图片数量
    images_to_delete=$((image_count - max_images))

    # 获取要删除的图片列表，并按修改时间排序
    images=$(find "$image_path" -maxdepth 1 -type f -name "*.jpg" -printf "%T@ %p\n" | sort -n | awk '{print $2}')

    # 删除最旧的图片
    echo "Deleting $images_to_delete images..."
    echo "$images" | head -n "$images_to_delete" | xargs rm -f

    echo "Done!"
else
    echo "No images to delete."
fi