我怎样才能回到安装包之前的状态？
安装：
# apt-get -y install --no-install-recommends build-essential
...
The following additional packages will be installed:
binutils cpp cpp-5 dpkg-dev g++ g++-5 gcc gcc-5 libasan2 libatomic1
libc-dev-bin libc6-dev libcilkrts5 libdpkg-perl libgcc-5-dev libgdbm3
libgomp1 libisl15 libitm1 liblsan0 libmpc3 libmpfr4 libmpx0 libperl5.22
libquadmath0 libstdc++-5-dev libtsan0 libubsan0 linux-libc-dev make patch
perl perl-modules-5.22 xz-utils
Suggested packages:
binutils-doc cpp-doc gcc-5-locales debian-keyring g++-multilib
g++-5-multilib gcc-5-doc libstdc++6-5-dbg gcc-multilib manpages-dev autoconf
automake libtool flex bison gcc-doc gcc-5-multilib libgcc1-dbg libgomp1-dbg
libitm1-dbg libatomic1-dbg libasan2-dbg liblsan0-dbg libtsan0-dbg
libubsan0-dbg libcilkrts5-dbg libmpx0-dbg libquadmath0-dbg glibc-doc
libstdc++-5-doc make-doc ed diffutils-doc perl-doc libterm-readline-gnu-perl
| libterm-readline-perl-perl
Recommended packages:
fakeroot libalgorithm-merge-perl manpages manpages-dev
libfile-fcntllock-perl rename
The following NEW packages will be installed:
binutils build-essential cpp cpp-5 dpkg-dev g++ g++-5 gcc gcc-5 libasan2
libatomic1 libc-dev-bin libc6-dev libcilkrts5 libdpkg-perl libgcc-5-dev
libgdbm3 libgomp1 libisl15 libitm1 liblsan0 libmpc3 libmpfr4 libmpx0
libperl5.22 libquadmath0 libstdc++-5-dev libtsan0 libubsan0 linux-libc-dev
make patch perl perl-modules-5.22 xz-utils
移动：
# apt-get -y --purge --auto-remove remove build-essential
...
The following packages will be REMOVED:
build-essential*
# apt-get -y --purge autoremove
...
The following packages will be REMOVED:
g++* g++-5* libstdc++-5-dev*
为什么要保留其他的东西？
答案1
简而言之：
sudo bash -c 'echo "Apt::AutoRemove::SuggestsImportant false;" > /etc/apt/apt.conf.d/01autoremove-suggested'
此行为由选项控制Apt::AutoRemove::SuggestsImportant。
选项：Apt::AutoRemove::SuggestsImportant
默认值： true
描述：如果该选项为真，则只要任何已安装的软件包建议使用未使用的软件包，aptitude 就不会将其视为未使用的软件包（因此不会自动删除它们）。有关更多信息，请参阅“管理自动安装的软件包”一节。
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