libgladeui-2-6 software package provides GTK+ User Interface Build core library, you can install in your Debian 8 (Jessie) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install libgladeui-2-6
libgladeui-2-6 is installed in your system.
Make ensure the libgladeui-2-6 package were installed using the commands given below,
$ sudo dpkg-query -l | grep libgladeui-2-6 *
You will get with libgladeui-2-6 package name, version, architecture and description in a table
| Distro | Debian 8 jessie |
| Section | Libraries |
| Package | libgladeui-2-6 |
| Version | 3.18.3-1 |
| Description | GTK+ User Interface Build core library |
| Sub Section | libs |