由于我分别维护数据库和 Web 服务器，我希望我的 Forge 维护的 Web 服务器没有 mysql，因为它往往会使用大量内存，即使我不使用它。
尝试运行 asudo apt-get --purge remove mysql-client mysql-server mysql-common将导致以下输出：
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package 'mysql-server' is not installed, so not removed
The following packages were automatically installed and are no longer required:
ghostscript gsfonts imagemagick-common libaio1 libavahi-client3
libavahi-common-data libavahi-common3 libboost-context1.54.0
libboost-filesystem1.54.0 libboost-program-options1.54.0
libboost-regex1.54.0 libboost-system1.54.0 libboost-thread1.54.0 libcups2
libcupsfilters1 libcupsimage2 libdbi-perl libfftw3-double3 libgflags2
libgoogle-glog0 libgs9 libgs9-common libijs-0.35 libjasper1 libjbig2dec0
libjemalloc1 liblcms2-2 liblqr-1-0 libmagickcore5 libmagickwand5
libmemcached10 libpaper-utils libpaper1 libtbb2 libterm-readkey-perl
libunwind8 linux-headers-3.13.0-52 linux-headers-3.13.0-52-generic
linux-image-3.13.0-52-generic linux-image-extra-3.13.0-52-generic
mysql-client-core-5.6 mysql-server-core-5.6 poppler-data
Use 'apt-get autoremove' to remove them.
The following packages will be REMOVED:
hhvm libdbd-mysql-perl libmysqlclient18 mysql-client-5.6 mysql-common
mysql-common-5.6 mysql-server-5.6
0 upgraded, 0 newly installed, 7 to remove and 4 not upgraded.
After this operation, 113 MB disk space will be freed.
Do you want to continue? [Y/n] n
Abort.
如您所见，我要求删除 mysql，但它也会删除hhvm我想保留的！有什么办法可以做到这一点？