下载校验与命令行
MD5
7336293f18ca28122e240261f1291632
SHA256
0b25f7e5abf7c1d3475faed77d5d3ff9a1b43bda0c9a190bc97ef1048978af25
curl -O https://secure-appldnld.apple.com/iOS7/091-9872.20130924.2wc82/iPhone4,1_7.0.2_11A501_Restore.ipsw
# 校验文件完整性
md5sum iPhone4,1_7.0.2_11A501_Restore.ipsw # 期望 7336293f18ca28122e240261f1291632