From：h ttp://joysofprogramming.com/install-readline-linux/
the apt-cache search and
apt-get install commands are
really useful.
Readline is used to read a line after editing. To work with readline in C/C++,
you must install the readline packages.
Let’s see the different readline packages
apt-cache search readline
libreadline-dev - GNU readline and history libraries,
development files
libreadline-java - GNU readline and BSD editline
wrappers for
Java
libreadline-java-doc - API docs for readline/editline wrappers for Java
libreadline5 - GNU readline and history libraries,
run-time
libraries
libreadline5-dbg - GNU readline and history libraries,
debugging libraries
libreadline5-dev - GNU readline and history libraries,
development files
libreadline6 - GN