ubuntu-12.04.3安装gcc4.8出错

[damaoshan]

按照下面博客内容安装
http://www.cnblogs.com/zhuyp1015/p/3533613.html

安装到
sudo apt-get update
出现以下错误

W: Failed to fetch bzip2:/var/lib/apt/lists/partial/extras.ubuntu.com_ubuntu_dists_precise_main_source_Sources Hash Sum mismatch

W: Failed to fetch bzip2:/var/lib/apt/lists/partial/extras.ubuntu.com_ubuntu_dists_precise_main_binary-amd64_Packages Hash Sum mismatch

W: Failed to fetch bzip2:/var/lib/apt/lists/partial/extras.ubuntu.com_ubuntu_dists_precise_main_binary-i386_Packages Hash Sum mismatch

W: Failed to fetch bzip2:/var/lib/apt/lists/partial/ppa.launchpad.net_ubuntu-toolchain-r_test_ubuntu_dists_precise_main_binary-amd64_Packages Hash Sum mismatch

W: Failed to fetch bzip2:/var/lib/apt/lists/partial/ppa.launchpad.net_ubuntu-toolchain-r_test_ubuntu_dists_precise_main_binary-i386_Packages Hash Sum mismatch

W: Failed to fetch bzip2:/var/lib/apt/lists/partial/us.archive.ubuntu.com_ubuntu_dists_precise_restricted_source_Sources Hash Sum mismatch

W: Failed to fetch bzip2:/var/lib/apt/lists/partial/ppa.launchpad.net_ubuntu-toolchain-r_test_ubuntu_dists_precise_main_i18n_Translation-en Hash Sum mismatch

W: Failed to fetch gzip:/var/lib/apt/lists/partial/us.archive.ubuntu.com_ubuntu_dists_precise-backports_universe_binary-i386_Packages Hash Sum mismatch

E: Some index files failed to download. They have been ignored, or old ones used instead.

如果继续
sudo apt-get install gcc-4.8
出现错误

E: Unable to locate package gcc-4.8
E: Couldn't find any package by regex 'gcc-4.8'


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求问如何解决？
多谢~

[zhxianbin]

http://blog.sina.com.cn/s/blog_afeac1330101bm2c.html http://blog.csdn.net/ville_zeng/article/details/8869981

[damaoshan]

引用 1 楼 zhxianbin 的回复:

http://blog.sina.com.cn/s/blog_afeac1330101bm2c.html http://blog.csdn.net/ville_zeng/article/details/8869981

大谢，基本正确，主要是不断尝试更好的 源 换源方法 http://www.lupaworld.com/article-217514-1.html