How to uninstall libxcb-atom0 from Ubuntu
To uninstall just libxcb-atom0 package itself from Ubuntu execute on terminal:
sudo apt-get remove libxcb-atom0
Uninstall libxcb-atom0 and it's dependent packages
To uninstall the libxcb-atom0 package and any other dependant package which are no longer needed on Ubuntu.
sudo apt-get autoremove libxcb-atom0
If you also want to delete configuration and/or data files of libxcb-atom0 from Ubuntu then this will work:
sudo apt-get purge libxcb-atom0
To delete configuration and/or data files of libxcb-atom0 and it's dependencies from Ubuntu then execute:
sudo apt-get autoremove --purge libxcb-atom0
libxcb-atom0 package information
utility libraries for X C Binding -- atom
This package contains the library files needed to run software using libxcb-atom, providing standard core X atom constants and atom caching. The xcb-util module provides a number of libraries which sit on top of libxcb, the core X protocol library, and some of the extension libraries. These experimental libraries provide convenience functions and interfaces which make the raw X protocol more usable. Some of the libraries also provide client-side code which is not strictly part of the X protocol but which have traditionally been provided by Xlib.
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.