错误:2 http://mirrors.aliyun.com/kali kali-rolling/main amd64 Packages
Writing more data than expected (15079856 > 15077315) [IP: 115.28.122.210 80]
Hashes of expected file:
- Filesize:15077315 [weak]
- SHA256:19e1fb21745914162c5801cf984970b75e4f57d629500960bc0f4d7eeb036814
- SHA1:a9b432ddd2ababb8823e534e56ab0a4ed650d474 [weak]
- MD5Sum:a4ab169765862c6cf54c1fac10284b10 [weak]
Release file created at: Tue, 23 May 2017 06:45:15 +0000
获取:4 http://mirrors.aliyun.com/kali kali-rolling/non-free amd64 Packages [164 kB]
获取:5 http://mirrors.aliyun.com/kali kali-rolling/contrib amd64 Packages [105 kB]
正在读取软件包列表... 完成
E: 无法下载 http://mirrors.aliyun.com/kali/dists/ka ... ackages.gz Writing more data than expected (15079856 > 15077315) [IP: 115.28.122.210 80]
Hashes of expected file:
- Filesize:15077315 [weak]
- SHA256:19e1fb21745914162c5801cf984970b75e4f57d629500960bc0f4d7eeb036814
- SHA1:a9b432ddd2ababb8823e534e56ab0a4ed650d474 [weak]
- MD5Sum:a4ab169765862c6cf54c1fac10284b10 [weak]
Release file created at: Tue, 23 May 2017 06:45:15 +0000
E: 部分索引文件下载失败。如果忽略它们，那将转而使用旧的索引文件。
求助

重新apt update呗

重新还是报这个错误：

Writing more data than expected (15079856 > 15077315) [IP: 115.28.122.210 80]
Hashes of expected file:
- Filesize:15077315 [weak]
- SHA256:19e1fb21745914162c5801cf984970b75e4f57d629500960bc0f4d7eeb036814
- SHA1:a9b432ddd2ababb8823e534e56ab0a4ed650d474 [weak]
- MD5Sum:a4ab169765862c6cf54c1fac10284b10 [weak]
Release file created at: Tue, 23 May 2017 06:45:15 +0000

用支持 https 的软件源如 USTC，并切换为 https，可以减小这种事情的概率

提示未安装apt-transport-https

目前很难更新源了，怎么办？

原来你是 kali，基于 debian 的，默认没有安装这个
切回 http 安装。如果由于清空了软件包列表装不了，用手机开个热点，电脑连上 apt update