我安装了 valgrind，它用一个略有不同的版本替换了我的 Ubuntu 12.04 系统上的 libc6，这破坏了我系统上的应用程序。我可以以某种方式恢复到 Ubuntu 5.1 版本吗？如果是这样，我在哪里可以找到它？
Preparing to replace libc6-dev 2.13-20ubuntu5.1 (using .../libc6-dev_2.13-20ubuntu5.3_amd64.deb) ...
Unpacking replacement libc6-dev ...
Preparing to replace libc-dev-bin 2.13-20ubuntu5.1 (using .../libc-dev-bin_2.13-20ubuntu5.3_amd64.deb) ...
Unpacking replacement libc-dev-bin ...
Preparing to replace libc-bin 2.13-20ubuntu5.1 (using .../libc-bin_2.13-20ubuntu5.3_amd64.deb) ...
Unpacking replacement libc-bin ...
Processing triggers for man-db ...
Setting up libc-bin (2.13-20ubuntu5.3) ...
(Reading database ... 192982 files and directories currently installed.)
Preparing to replace libc6 2.13-20ubuntu5.1 (using .../libc6_2.13-20ubuntu5.3_amd64.deb) ...
Unpacking replacement libc6 ...
Setting up libc6 (2.13-20ubuntu5.3) …