lcl-gtk2 software package provides Lazarus Components Library - GTK+ backend dependency package, you can install in your Ubuntu 17.04 (Zesty Zapus) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install lcl-gtk2
lcl-gtk2 is installed in your system.
Make ensure the lcl-gtk2 package were installed using the commands given below,
$ sudo dpkg-query -l | grep lcl-gtk2 *
You will get with lcl-gtk2 package name, version, architecture and description in a table
| Distro | Ubuntu 17 04 zesty zapus |
| Section | Development |
| Package | lcl-gtk2 |
| Version | 1.6+dfsg-6 |
| Description | Lazarus Components Library - GTK+ backend dependency package |
| Sub Section | devel |