如果ubuntu安装的64位的，在其中安装32位软件时就会碰到缺失libgtk-x11-2.0.so的情况
比如用wine安装qq时 启动qq时就会报这样的错误
error while loading shared libraries: libgtk-x11-2.0.so.0: cannot open shared object file: No such file or directory
网上的解决方法
sudo apt-get install ia32-libs ia32-libs-gtk
但是又出现一下错误提示：
sudo apt-get install ia32-libs Reading package lists… Done Building dependency tree Reading state information… Done Package ia32-libs is not available, but is referred to by another package. This may mean that the package is missing, has been obsoleted, or is only available from another source E: Package ‘ia32-libs’ has no installation candidate
于是又搜索，知道要添加以前版本的源，然后就行了
下面是添加源的方法：
方法1：
sudo gedit /etc/apt/sources.list
然后在最后添加上：
deb http://archive.ubuntu.com/ubuntu/ raring main restricted universe multiverse
方法2：
终端中输入：
echo "deb http://archive.ubuntu.com/ubuntu/ raring main restricted universe multiverse" >> sudo gedit /etc/apt/sources.list
还有其他添加本地源的方法，可以参考：http://hi.baidu.com/android4/item/6c0f962351a7ec102b0f1cac
添加完源之后
sudo apt-get update sudo apt-get install ia32-libs ia32-libs-gtk
这样就应该可以了