如何删除Lubuntu桌面环境并再次回到默认状态？

Question

我对Ubuntu有意见。它总是从低的图形设置开始，并且运行缓慢。

1. 我安装了Lubuntu桌面环境，然后我意识到我不喜欢它，所以我尝试删除它。我可能将SeatDefaults设置为空白或: user-session=ubuntu greeter=unity
2. 我怎么把它放回Ubuntu呢？我不记得我所做的所有改变，我不知道如何修复它们。我不想丢失我的应用程序或文档。

编辑:运行Nathan建议的代码后，我得到以下输出

sudo apt-get purge --auto-remove abiword abiword-commonabiword-plugin-grammar abiword-plugin-mathview  ace-of-penguins audacious audacious-plugins audacious-plugins-data blueman  chromium-browser chromium-browser-l10n chromium-codecs-ffmpeg  elementary-icon-theme esound-common galculator gdebi gdebi-core  gecko-mediaplayer giblib1 gnome-icon-theme-full gnome-mplayer gnome-system-tools  gnome-time-admin gnumeric gnumeric-common gnumeric-doc gpicview  gtk2-engines-pixbuf guvcview hardinfo indicator-status-provider-pidgin leafpad  libaacs0 libabiword-2.9 libaudclient2 libaudcore1 libaudiofile1 libbinio1ldbl  libbluray1 libbs2b0 libcddb2 libcompfaceg1 libcue1 libencode-locale-perl  libept1.4.12 libesd0 libexo-1-0 libexo-common libexo-helpers  libfile-listing-perl libfluidsynth1 libfm-data libfm-gtk-data libfm-gtk1 libfm1  libfont-afm-perl libgdome2-0 libgdome2-cpp-smart0c2a libglade2-0 libgmlib0  libgmtk0 libgmtk0-data libgoffice-0.8-8 libgoffice-0.8-8-common libgringotts2  libgsf-1-114 libgsf-1-common libgtkmathview0c2a libguess1 libhtml-form-perl  libhtml-format-perl libhtml-parser-perl libhtml-tagset-perl libhtml-tree-perl  libhttp-cookies-perl libhttp-daemon-perl libhttp-date-perl libhttp-message-perl  libhttp-negotiate-perl libid3tag0 libimlib2 libio-socket-inet6-perl  libio-socket-ssl-perl libjpeg-progs libjpeg-turbo-progs liblink-grammar4  libloudmouth1-0 liblwp-mediatypes-perl liblwp-protocol-https-perl  libmailtools-perl libmcrypt4 libmenu-cache1 libmowgli2 libmpg123-0  libnet-dbus-perl libnet-http-perl libnet-ssleay-perl libobrender27 libobt0  libonig2 liboobs-1-5 libopts25 libots0 libpisock9 libresid-builder0c2a  libsidplay2 libsocket6-perl libtar0 libtidy-0.99-0 libtie-ixhash-perl  libtimedate-perl libuniconf4.6 liburi-perl libvdpau1 libwebcam0 libwv-1.2-4  libwvstreams4.6-base libwvstreams4.6-extras libwww-perl libwww-robotrules-perl  libxfce4ui-1-0 libxfce4util-bin libxfce4util-common libxfce4util4 libxfconf-0-2  libxml-parser-perl libxml-twig-perl libxml-xpath-perl libxss1  lightdm-gtk-greeter link-grammar-dictionaries-en lm-sensors lubuntu-artwork  lubuntu-artwork-12-04 lubuntu-core lubuntu-default-settings lubuntu-desktop  lubuntu-icon-theme lubuntu-software-center lxappearance lxappearance-obconf  lxinput lxkeymap lxlauncher lxmenu-data lxpanel lxpanel-indicator-applet-plugin  lxrandr lxsession lxsession-edit lxshortcut lxtask lxterminal mplayer2 mtpaint  ntp obconf openbox openbox-themes osmo pcmanfm pidgin pidgin-data  pidgin-libnotify pidgin-microblog plymouth-theme-lubuntu-logo  plymouth-theme-lubuntu-text python-pysqlite2 python-xklavier scrot sylpheed  sylpheed-doc sylpheed-i18n sylpheed-plugins synaptic system-tools-backends  transmission ttf-lyx uvcdynctrl uvcdynctrl-data wvdial xfburn  xfce-keyboard-shortcuts xfce4-power-manager xfce4-power-manager-data xfconf  xfonts-100dpi xpad xscreensaver xscreensaver-dat
 Reading package lists... Done
 Building dependency tree       
 Reading state information... Done
 Package 'indicator-status-provider-pidgin' is not installed, so not                       removed
 Package 'libfm1' is not installed, so not removed
 Package 'libmenu-cache1' is not installed, so not removed
 Package 'libxfce4util4' is not installed, so not removed
 E: Unable to locate package abiword-commonabiword-plugin-grammar
 E: Unable to locate package libabiword-2.9
 E: Couldn't find any package by regex 'libabiword-2.9'
 E: Unable to locate package libfm-gtk1
 E: Unable to locate package libgmlib0
 E: Unable to locate package libgmtk0
 E: Unable to locate package libgmtk0-data
 E: Unable to locate package libobrender27
 E: Unable to locate package libobt0
 E: Unable to locate package openbox-themes

编辑_2/更新：

运行代码后，建议从Nathan编写代码：

sudo apt-get purge --auto-remove abiword abiword-plugin-mathview ace-of-penguins audacious audacious-plugins audacious-plugins-data blueman chromium-browser chromium-browser-l10n chromium-codecs-ffmpeg elementary-icon-theme esound-common galculator gdebi gdebi-core gecko-mediaplayer giblib1 gnome-icon-theme-full gnome-mplayer gnome-system-tools gnome-time-admin gnumeric gnumeric-common gnumeric-doc gpicview gtk2-engines-pixbuf guvcview hardinfo leafpad libaacs0 libaudclient2 libaudcore1 libaudiofile1 libbinio1ldbl libbluray1 libbs2b0 libcddb2 libcompfaceg1 libcue1 libencode-locale-perl libept1.4.12 libesd0 libexo-1-0 libexo-common libexo-helpers libfile-listing-perl libfluidsynth1 libfm-data libfm-gtk-data libfont-afm-perl libgdome2-0 libgdome2-cpp-smart0c2a libglade2-0 libgoffice-0.8-8 libgoffice-0.8-8-common libgringotts2 libgsf-1-114 libgsf-1-common libgtkmathview0c2a libguess1 libhtml-form-perl libhtml-format-perl libhtml-parser-perl libhtml-tagset-perl libhtml-tree-perl libhttp-cookies-perl libhttp-daemon-perl libhttp-date-perl libhttp-message-perl libhttp-negotiate-perl libid3tag0 libimlib2 libio-socket-inet6-perl libio-socket-ssl-perl libjpeg-progs libjpeg-turbo-progs liblink-grammar4 libloudmouth1-0 liblwp-mediatypes-perl liblwp-protocol-https-perl libmailtools-perl libmcrypt4 libmowgli2 libmpg123-0 libnet-dbus-perl libnet-http-perl libnet-ssleay-perl libonig2 liboobs-1-5 libopts25 libots0 libpisock9 libresid-builder0c2a libsidplay2 libsocket6-perl libtar0 libtidy-0.99-0 libtie-ixhash-perl libtimedate-perl libuniconf4.6 liburi-perl libvdpau1 libwebcam0 libwv-1.2-4 libwvstreams4.6-base libwvstreams4.6-extras libwww-perl libwww-robotrules-perl libxfce4ui-1-0 libxfce4util-bin libxfce4util-common libxfconf-0-2 libxml-parser-perl libxml-twig-perl libxml-xpath-perl libxss1 lightdm-gtk-greeter link-grammar-dictionaries-en lm-sensors lubuntu-artwork lubuntu-artwork-12-04 lubuntu-core lubuntu-default-settings lubuntu-desktop lubuntu-icon-theme lubuntu-software-center lxappearance lxappearance-obconf lxinput lxkeymap lxlauncher lxmenu-data lxpanel lxpanel-indicator-applet-plugin lxrandr lxsession lxsession-edit lxshortcut lxtask lxterminal mplayer2 mtpaint ntp obconf openbox osmo pcmanfm pidgin pidgin-data pidgin-libnotify pidgin-microblog plymouth-theme-lubuntu-logo plymouth-theme-lubuntu-text python-pysqlite2 python-xklavier scrot sylpheed sylpheed-doc sylpheed-i18n sylpheed-plugins synaptic system-tools-backends transmission ttf-lyx uvcdynctrl uvcdynctrl-data wvdial xfburn xfce-keyboard-shortcuts xfce4-power-manager xfce4-power-manager-data xfconf xfonts-100dpi xpad xscreensaver xscreensaver-data

这个过程没有任何问题，但是当我重新启动时，我被困在Ubuntu的引导屏幕上。

我的下一个问题是，如果我可以恢复整个系统的默认与松散的一切，但我将从头开始，而不需要USB，CD，DVD或其他可引导媒体来启动系统？

提前谢谢你。

Answer 1

我认为您可以遵循问题undefined的答案中列出的步骤，跳过除lubuntu桌面之外的其他桌面环境。(他们还安装了xubuntu、肉桂和gnome)

编辑:这里，现在试一试。我编写了一个快速python脚本，以从原始命令中删除错误中出现的包。它给了我：

sudo apt-get purge --auto-remove abiword abiword-plugin-mathview ace-of-penguins audacious audacious-plugins audacious-plugins-data blueman chromium-browser chromium-browser-l10n chromium-codecs-ffmpeg elementary-icon-theme esound-common galculator gdebi gdebi-core gecko-mediaplayer giblib1 gnome-icon-theme-full gnome-mplayer gnome-system-tools gnome-time-admin gnumeric gnumeric-common gnumeric-doc gpicview gtk2-engines-pixbuf guvcview hardinfo leafpad libaacs0 libaudclient2 libaudcore1 libaudiofile1 libbinio1ldbl libbluray1 libbs2b0 libcddb2 libcompfaceg1 libcue1 libencode-locale-perl libept1.4.12 libesd0 libexo-1-0 libexo-common libexo-helpers libfile-listing-perl libfluidsynth1 libfm-data libfm-gtk-data libfont-afm-perl libgdome2-0 libgdome2-cpp-smart0c2a libglade2-0 libgoffice-0.8-8 libgoffice-0.8-8-common libgringotts2 libgsf-1-114 libgsf-1-common libgtkmathview0c2a libguess1 libhtml-form-perl libhtml-format-perl libhtml-parser-perl libhtml-tagset-perl libhtml-tree-perl libhttp-cookies-perl libhttp-daemon-perl libhttp-date-perl libhttp-message-perl libhttp-negotiate-perl libid3tag0 libimlib2 libio-socket-inet6-perl libio-socket-ssl-perl libjpeg-progs libjpeg-turbo-progs liblink-grammar4 libloudmouth1-0 liblwp-mediatypes-perl liblwp-protocol-https-perl libmailtools-perl libmcrypt4 libmowgli2 libmpg123-0 libnet-dbus-perl libnet-http-perl libnet-ssleay-perl libonig2 liboobs-1-5 libopts25 libots0 libpisock9 libresid-builder0c2a libsidplay2 libsocket6-perl libtar0 libtidy-0.99-0 libtie-ixhash-perl libtimedate-perl libuniconf4.6 liburi-perl libvdpau1 libwebcam0 libwv-1.2-4 libwvstreams4.6-base libwvstreams4.6-extras libwww-perl libwww-robotrules-perl libxfce4ui-1-0 libxfce4util-bin libxfce4util-common libxfconf-0-2 libxml-parser-perl libxml-twig-perl libxml-xpath-perl libxss1 lightdm-gtk-greeter link-grammar-dictionaries-en lm-sensors lubuntu-artwork lubuntu-artwork-12-04 lubuntu-core lubuntu-default-settings lubuntu-desktop lubuntu-icon-theme lubuntu-software-center lxappearance lxappearance-obconf lxinput lxkeymap lxlauncher lxmenu-data lxpanel lxpanel-indicator-applet-plugin lxrandr lxsession lxsession-edit lxshortcut lxtask lxterminal mplayer2 mtpaint ntp obconf openbox osmo pcmanfm pidgin pidgin-data pidgin-libnotify pidgin-microblog plymouth-theme-lubuntu-logo plymouth-theme-lubuntu-text python-pysqlite2 python-xklavier scrot sylpheed sylpheed-doc sylpheed-i18n sylpheed-plugins synaptic system-tools-backends transmission ttf-lyx uvcdynctrl uvcdynctrl-data wvdial xfburn xfce-keyboard-shortcuts xfce4-power-manager xfce4-power-manager-data xfconf xfonts-100dpi xpad xscreensaver xscreensaver-data

如果这不起作用，如果你只是用

sudo apt-get purge --auto-remove lubuntu-desktop

如前所述，在该命令之后，您还应该自动清除掉不需要的旧包数据& update &dist-升级，用于更新w/智能依赖关系处理，如下所示：

sudo apt-get autoclean

sudo apt-get update 

sudo apt-get dist-upgrade

更新2:尝试重新启动计算机，然后按Ctrl+Alt+F1键，而不是正常登录。这将使您进入文本模式的tty1 shell (Ctrl+Alt+F7将使您回到GUI -一旦GUI被修复！)。输入您的用户名和密码登录。

如果你幸运的话，你会有互联网(要找出答案，输入'ping askubuntu.com‘等几秒钟&如果你收到错误/超时以外的响应，它会工作&你可以停止它w/ ctrl+c)，否则你可以搜索并找到如何从命令行连接到网络的指南。

现在您可能可以尝试一些类似于

sudo apt-get --fix-broken install unity unity-greeter

然后重新启动。另外，查看LightDM的显示管理器文档 &ubuntu专用的这里的文件。您可能需要重新安装/重新配置它，以使其正常工作。

如果这不起作用，或者似乎比获得可引导媒体更难，那么您最好的选择是尝试Xubuntu或其他您认为最有效的Ubuntu版本。从活动会话，您应该能够移动您的重要文件，然后安装。还有一些方法可以创建节约的安装(比如主磁盘上的活动会话)--有时是w/o可引导媒体，但它们可能很棘手，因为您必须使用大量命令行实用工具&/或让虚拟机运行。

祝好运!