How to uninstall css-mode from Ubuntu

Uninstall css-mode

To uninstall just css-mode package itself from Ubuntu execute on terminal:

sudo apt-get remove css-mode

Uninstall css-mode and it's dependent packages

To uninstall the css-mode package and any other dependant package which are no longer needed on Ubuntu.

sudo apt-get autoremove css-mode

Purging css-mode

If you also want to delete configuration and/or data files of css-mode from Ubuntu then this will work:

sudo apt-get purge css-mode

To delete configuration and/or data files of css-mode and it's dependencies from Ubuntu then execute:

sudo apt-get autoremove --purge css-mode

css-mode package information

name css-mode
section editors
description

A Cascading Style Sheets (CSS) editing mode for Emacs

website www.garshol.priv.no/ download/ software/ css-mode/ 
maintainer ubuntu-motu@lists.ubuntu.com

More information about apt-get remove

Advanced Package Tool, or APT, is a free software user interface that works with core libraries to handle the installation and removal of software on Debian, Ubuntu and other Linux distributions. APT simplifies the process of managing software on Unix-like computer systems by automating the retrieval, configuration and installation of software packages, either from precompiled files or by compiling source code.

apt-get is the command-line tool for handling packages, and may be considered the user's "back-end" to other tools using the APT library.

apt-get remove is identical to install except that packages are removed instead of installed. Note that removing a package leaves its configuration files on the system. If a plus sign is appended to the package name (with no intervening space), the identified package will be installed instead of removed.

See Also

How to install css-mode package on Ubuntu