下载校验与命令行
MD5
2384a47f4e3d8f7c1c4e354610a3304c
SHA256
ec3d24e8299563bca957fb9f689b306ca0a6bb157a543e3282dd1a0c5b27372c
curl -O https://updates.cdn-apple.com/2021FallFCS/fullrestores/002-03508/8281BE23-3E20-4CB6-AFF7-1B03CD666DB9/iPhone_4.7_15.0_19A346_Restore.ipsw
# 校验文件完整性
md5sum iPhone_4.7_15.0_19A346_Restore.ipsw # 期望 2384a47f4e3d8f7c1c4e354610a3304c