How to uninstall libboost-regex1.42-dev from Ubuntu
To uninstall just libboost-regex1.42-dev package itself from Ubuntu execute on terminal:
sudo apt-get remove libboost-regex1.42-dev
Uninstall libboost-regex1.42-dev and it's dependent packages
To uninstall the libboost-regex1.42-dev package and any other dependant package which are no longer needed on Ubuntu.
sudo apt-get autoremove libboost-regex1.42-dev
If you also want to delete configuration and/or data files of libboost-regex1.42-dev from Ubuntu then this will work:
sudo apt-get purge libboost-regex1.42-dev
To delete configuration and/or data files of libboost-regex1.42-dev and it's dependencies from Ubuntu then execute:
sudo apt-get autoremove --purge libboost-regex1.42-dev
libboost-regex1.42-dev package information
regular expression library for C++
This package forms part of the Boost C++ Libraries collection. Regular expressions are a form of pattern-matching that are often used in text processing; many users will be familiar with the Unix utilities grep, sed and awk, and the programming language perl, each of which make extensive use of regular expressions. Traditionally C++ users have been limited to the POSIX C APIs for manipulating regular expressions, and while regex does provide these APIs, they do not represent the best way to use the library. For example regex can cope with wide character strings, or search and replace operations (in a manner analogous to either sed or perl), something that traditional C libraries can not do.
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.