每当我尝试libpng12-0使用此命令进行安装时：
sudo apt-get install libpng12-0
我得到这个返回：
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following packages were automatically installed and are no longer required:
gstreamer0.10-plugins-base libavformat53 libcdaudio1 libgcrypt11 libgnutls-deb0-28 libgnutls26 libgsoap5
libgstreamer-plugins-bad0.10-0 libgstreamer-plugins-base0.10-0 libgstreamer0.10-0 libhogweed2 libjasper1 libmimic0
libmpg123-0 libnettle4 libpostproc52 libqt4-dbus libqt4-network libqt4-opengl libqt4-xml libqtcore4 libqtdbus4
libqtgui4 librtmp0 libslv2-9 libsoundtouch0 libswscale2 libtasn1-3 libuv1 libvncserver0 libwildmidi1 qdbus
qt-at-spi qtchooser qtcore4-l10n virtualbox-dkms
Use 'sudo apt autoremove' to remove them.
The following NEW packages will be installed: …