How to uninstall nvclock-gtk from Ubuntu

Uninstall nvclock-gtk

To uninstall just nvclock-gtk package itself from Ubuntu execute on terminal:

sudo apt-get remove nvclock-gtk

Uninstall nvclock-gtk and it's dependent packages

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

sudo apt-get autoremove nvclock-gtk

Purging nvclock-gtk

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

sudo apt-get purge nvclock-gtk

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

sudo apt-get autoremove --purge nvclock-gtk

nvclock-gtk package information

name nvclock-gtk
section x11

Overclock an NVIDIA card (GTK+ interface)

website nvclock/ 

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 nvclock-gtk package on Ubuntu