如何计算包含一些不可读内容的文件夹的大小？

Question

将/var/lib包含一些不可读的内容，其中之一是在mysql文件夹中。我想查看/var/lib文件夹的大小，mysql特别是文件夹的大小。右键单击它并单击“属性”选项给我这个：

如果您需要规格：

• Ubuntu 12.10
• 鹦鹉螺 3.4.2

编辑：

`du -sh /var/lib` gives me this:
du: cannot read directory `/var/lib/sudo': Permission denied
du: cannot read directory `/var/lib/tor': Permission denied
du: cannot read directory `/var/lib/udisks2': Permission denied
du: cannot read directory `/var/lib/php5': Permission denied
du: cannot read directory `/var/lib/openfire': Permission denied
du: cannot read directory `/var/lib/gdm': Permission denied
du: cannot read directory `/var/lib/lightdm': Permission denied
du: cannot read directory `/var/lib/polkit-1': Permission denied
du: cannot read directory `/var/lib/mysql': Permission denied
du: cannot read directory `/var/lib/libvirt/qemu': Permission denied
du: cannot read directory `/var/lib/libvirt/sanlock': Permission denied
du: cannot read directory `/var/lib/libvirt/images': Permission denied
du: cannot read directory `/var/lib/libvirt/boot': Permission denied
266M    /var/lib

并sudo du -sh /var/lib给出：

309M    /var/lib

Answer 1

sudo du -sh lib/应该可以完成这项工作。它显示的大小大于“属性”窗口中显示的大小。需要 root 登录，因为只有 root 可以访问某些文件。因此，权限被拒绝和不可读的内容错误。